BE347621A - - Google Patents

Description

       

    <Desc / Clms Page number 1>
 



   The present invention relates to automatic telephone systems in general, but more particularly to systems of the kind in which any subscriber can, by means of suitable selection devices, establish a communication with the line of any. another subscriber born to the system, provided naturally that this line is not busy, and especially automatic telephone systems in which the mechanism or apparatus by means of which a subscriber establishes a communication with the line of another subscriber, without the assistance of a telephone operator or other agent, consists of an appropriate number of switches which operate on the principle of jerky motion and which,

   as a result of the use of switching devices ap

  <Desc / Clms Page number 2>

 proprietary to subscriber stations, are under the control of the various subscribers and are intended to be operated by them.



   Prior to the present invention, the general practice was, to the knowledge of the present inventors, to employ in a telephone system of the particular type indicated above, that is to say a number of switches corresponding in total number of subscribers, each of these. switches being assigned to a single subscriber and being specific to this one, and each switch being therefore used only by the subscriber to which it is assigned, to establish a communication, directly or indirectly, with the line of a another subscriber, or one or more switches operating constantly to collect calls.

   If these individual switches are intended to receive the pulse or pulses corresponding to the first digit of the called number, they are called first selectors, provided of course that the desk is of such dimensions as to necessitate the use of several switches for establishing a communication between two subscriber lines.

   It has also been proposed to reduce the number of these first selectors to a certain percentage, that is to say to employ for example ten or twenty first selectors for each hundred subscribers in the office, each group. selectors thus being common to a large number of subscribers; with a provision of this kind, we have. It was then customary to provide each subscriber with a so-called individual switch, intended to be actuated by one or more pulses launched by the subscriber in the line before calling the number of the desired subscriber.

   Other more or less similar constructions and arrangements have been proposed, their aim being generally to reduce as much as possible the number of switches in the office; but in each case, to the knowledge of the present inventors, it has always been necessary, prior to the present invention, to employ either

  <Desc / Clms Page number 3>

 constantly operating mutators, or to provide each subscriber with an individual selective switching device of some kind, that is to say the number of jerky switching devices or other devices appropriate by the '' through which any subscriber establishes the initial connection necessary for establishing a communication with the line of any other subscriber,

   always corresponds to the total number of subscriber sets that can communicate with the office or central set.



  In other words, and regardless of the arrangement and division of the switching devices, it has always been necessary, prior to the present invention, to employ constantly operating switches or to provide each subscriber with the telephone. of a type of selective switching device, that is to say of a device specific to its line to choose a junction line or to be connected to a line.

   For example, in a patent application filed in America under number 249499 on March 10, 1905 for improvements in automatic electrical switching means, there is a machine controlling a switch which is common to all members of the switchboard. a group of subscribers, each subscriber being however provided with an individual switch, that is to say a switching device with jerky advancement which is assigned to a subscriber line and used only by this subscriber , although all of the different individual switches are operated through a switch control machine which is common to all subscribers in the group;

   in the present case, on the contrary, as will emerge more fully from what follows, one of the main goals to be achieved is the reduction of all saddle-motion switches on a percentage basis, so as to drastically reduce the amount of switching machines and devices needed for service between subscribers, such that virtually none of the central station devices or

  <Desc / Clms Page number 4>

 of the office is not specific to subscriber lines, except perhaps in the case of line relays or other extremely simple control devices, as will emerge more clearly from the following; another object is to do away with all constantly operating switches or similar circuit control machines.



   In general, the object of the present invention is to provide an improved construction and arrangement allowing a satisfactory and efficient telephone service between the different subscribers, but without the need to provide each subscriber with one. individual selective switching device, and with the additional advantage of a significant reduction in the quantity of selective switching devices or devices necessarily employed in the office or central station.



   A special object is to provide an improved construction and arrangement enclosing a selective switching apparatus which may be employed in common by a group of subscribers of any suitable number and which, after serving the purpose of one of the subscribers to make the first connection necessary in establishing a communication with another subscriber line, then automatically places itself in a state such that it is ready for use by the next subscriber in the group wishing to call another subscriber, the time used by this device for establishing the desired connection being of sufficiently short duration that even despite the various subscribers of the group initiating calls in rapid succession, the device can always meet the desires of each subscriber,

   since it is extremely unlikely that two subscribers simultaneously pick up their receivers and attempt to use the device in question at the same time.



   Another object is to provide an improved construction and arrangement whereby a selective switching apparatus can be commonly employed by some name.

  <Desc / Clms Page number 5>

 number of subscribers as a means of making the first connection necessary for establishing a communication with the called subscriber, and in combination with a group of first selectors which are much less in number than the group of subscribers to whom the apparatus as a whole is assigned;

   it is possible with this arrangement to use for example only ten first selectors for each hundred subscribers, this selective switching device which is common to a hundred subscribers being intended to connect a subscriber line ap - peeling from any of the first ten selectors, the selector thus chosen being naturally a selector which is not used at this time by another subscriber of the same group.



   Another object is to provide an improved apparatus, normally at rest, for choosing a trunk line and establishing a connection, which apparatus is interposed between the subscriber lines and the first selectors or other means. appropriate to form connections in accordance with the called number,
It is also an object of the invention to provide certain construction details tending to increase the general efficiency, the economy of installation and maintenance and the operating qualities of an automatic telephone system of this particular type. .



   In several respects, the present invention constitutes an improvement to the telephone system and to the devices indicated in the other mentioned patent. For example, this patent shows an arrangement whereby a single switch actuation machine can be made common to all members of a subscriber group, and whereby this machine can be used by n 'any subscriber of this group as a means of operating a switch taken from a number of jerky feed switches, so as to connect the calling subscriber line to a trunk line,

   and without hindering subsequent employment and

  <Desc / Clms Page number 6>

 practically immediate from this machine by other subscribers to establish other communications while the activated switch remains in service; On the contrary, with the arrangement described and claimed hereinafter, the switches which are actuated automatically by the switch actuating machine, instead of being each unique to a subscriber, are in number much smaller than the total number of subscribers and are furthermore electrically connected to the switch actuating machine, instead of being mechanically connected to it as in the prior patent.

   Accordingly, as previously indicated, an advantage of the present invention lies in the fact that virtually none of the devices in the office are unique to different subscribers, each jerky feed switch, or other switching device capable of making any one of several possible connections, being common to several of the subscribers and nothing, apart from the number of line relays or other similar simple devices, being in number equal to the number total subscribers.



   In the accompanying drawings, Fig. 1 is a schematic view showing the electrical construction and circuit arrangement of this selective switching device which is common to a group of about one hundred subscribers.



   Figure 2 is a schematic view showing the electrical construction and circuit arrangement of one of the preliminary connectors which are arranged in groups of about ten, each group being assigned to a group of about one hundred subscribers. born approximately.



   Figure 3 is a plan view of the machine or switching apparatus shown schematically in Figure 1 and also shows several of the "line" or "individual relays.



   Figure 4 is an end view of the selective switching device shown in Figure 3.

  <Desc / Clms Page number 7>

 



   Figure 5 is a section taken along line 5-5 of Figure 3, viewed in the direction indicated by the arrows.



   Figure 6 is a detail showing a different position of some of the parts shown in Figure 5.



   Figure 7 is a detail of a section through line 7-7 of Figure 4.



   Figure 8 is a horizontal section taken on line 5-8 of Figure 3 but viewed in a direction opposite to that indicated by the arrows.



   Figure 9 is another end view of the selective switching device shown in Figure 3.



   Figure 10 shows in detail a section through line 10-10 of Figure 8.



   Figure 11 is a perspective detail view of one of the spring-loaded switch devices forming part of the construction of the selective switching device.



   Figure 12 is a schematic representation of a subscriber telephone and switchgear.



   Figure 13 shows the mechanical construction of one of the preliminary connectors which constitute a new feature of an automatic telephone system.



   Figure 14 shows an ordinary connector switch, which is intended to be employed to make the final connection with the called subscriber line and which is here shown, described and claimed in combination with other features, but which is not new in itself.



   Fig. 15 is a diagram showing the circuit connections which exist during the time that two subscriber lines are in communication for a conversation in a system in which it has been assumed that there are only a relatively small number. small number of subscribers and in which no first, second or third selectors are employed, an ordinary connector being sufficient for the needs of the calling subscriber after the preliminary connections have been established.

  <Desc / Clms Page number 8>

 



   Figure 16 is a detail view on a larger scale of a relay of the series shown in Figure 1.



   FIG. 17 is a diagram showing the capacity of the system increased to go, for example, from a hundred system to a thousand system. In this figure, the LL trunking line conductors coming from the wipers of the preliminary connector or the non-digital selector end in an N selector switch instead of ending in a connector as in figure 15. The N selector is of the same type. general type described in US Patent No. 815321 granted March 13, 1906 to Keith, Erickson # Erickson From each series of fixed contacts of this selector leaves a junction line which terminates in a switch-connector such as the one shown in the figure
15. There is shown one of these junction lines comprising the conductors L1 and L2.

   In other words, the selector H is suitably interposed (in Fig. 15) between the trunk line connection switch and the connector.



   Figure 18 shows schematically a second selector which, if the system is further increased in capacity, for example from one thousand to ten miles, is interposed between the first selector N and the switch-connector.



   Figure 19 schematically shows a third selector switch which is employed when the central office is established for a hundred mile system. Selector 0 is shown connected to switch connector M which is the same as the connector shown in figure 15.



  The apparatus being as thus shown, with a view to a better understanding of the construction and operation of the improved automatic telephone system, before entering into a more complete description of the details of the construction, the arrangement and the mode of operation are as follows: the subscribers can be divided into groups of one hundred each. Each subscriber can be provided with any suitable type of device, for example the one represented.

  <Desc / Clms Page number 9>

 tee in figure 12. Each subscriber line ends at the office or central station in a line relay such as for example the line relay shown to the right of figure 2.



   At the central station, each line is also preferably connected normally to the fixed contacts of an appropriate number of switches, for example ten of the jerky-advancing switches shown to the left of Figure 2. In addition, an automatic switching device. switch of the kind shown in figure 1 is assigned to each subscriber group and associated with the ten jerky-advancing switches shown in figure
2. When the subscriber begins calling another subscriber, the act of removing the receiver operates the line relay at which the calling subscriber's line terminates.

   This naturally precedes the calling operation of the number of the desired subscriber and the whole occurs in the interval between the removal of the receiver of the calling subscriber and the transmission of the first or the first necessary pulses. to call the desired number. As soon as the line relay operates, it activates the apparatus shown in figure 1 and from that moment until the subscriber begins to call the desired number, operation is strictly - tomatic.

   As soon as the automatic switching device shown in FIG. 1 is put into action by any one of the subscribers of the group to which this switch is assigned, it automatically chooses a free switch from the group of ten jerky advance switches of the same. The species shown in Figure 2, which switches are assigned to the above-indicated group of subscribers and to the switching apparatus shown in Figure 1. The arrangement is also such that the switch shown in Figure 1 is preferably still in connection with one of the switches shown in FIG. 2, that is to say with one of the ten switches which is not occupied. On leave .. quence, the apparatus in Figure 1 automatically calls, as soon as it is set in motion, the number of the calling subscriber.

   In

  <Desc / Clms Page number 10>

 in other words, the switch shown in figure 1 automatically transmits pulses corresponding to the number of the calling subscriber, which obliges the switch of figure 2 to choose the fixed contacts connected to the subscriber's line. - peeling. In this way, by simply removing the receiver or in any other suitable manner, the calling subscriber automatically calls his own line so to speak and thus establishes a connection with a free trunk extending, for example, to 'to a first selector or some other switch.

   As soon as this has been done, the subscriber is then, in the meantime, ready to start the operation of calling the desired number; but it is only connected to that first selector or other switch from the time it begins the call until the conversation is over and the switches have returned to their normal positions. There are therefore no individual switches, the line relays being practically the only devices which are each made individual to a single subscriber. Therefore, the number of the first selectors and other necessary switches may be much smaller than the total number of subscribers, resulting in the apparatus being simplified and considerably reduced without in any way decreasing the efficiency of the service. between subscribers.

   This is obviously largely due to the fact that the automatic switch shown in Figure 1, after having automatically called the number of the calling subscriber and thus having established a communication between the line of the calling subscriber and one of the ten switches shown in FIG. 2, then returns to the normal state and remains ready to be used by another subscriber of the same group. With this arrangement therefore, unless two subscribers of the group to which the switch of Figure 1 is assigned simultaneously remove their receivers, etc., which is extremely unlikely, the switch of Figure 1 is always ready to be used by any subscriber in the group for the purpose of connecting

  <Desc / Clms Page number 11>

 its line has a first free selector.

   Despite the fact that there are no jerky-motion selective switches which are unique to subscribers, the operation, as far as the calling subscriber is concerned, is practically the same as if each line terminated in a first selector or another analog switch. In other words, the calling subscriber, by simply removing his receiver from the usual hook, automatically initiates a series of electrical operations which are completed when he is ready to begin the call. call the desired number;

   without any hesitation or additional work on the part of the calling subscriber, a first selector, a connector, or another switch, depending on the size of the office, is thus placed in electrical communication with its line and is ready to receive the or the pulses corresponding to one or more digits of the called number, as the case may be.

   From this point on, the apparatus and operation may be of any suitable nature known or deemed suitable, the invention relating more particularly to that part of the operation which is between the time of removal of the receiver from the device. the calling subscriber and the subsequent automatic connection with a first free selector or another switch; the devices then employed to call the desired number and to terminate the connection to the called subscriber may be of any suitable nature known or deemed suitable.



   In general, before describing the details of the construction, the operation of connecting one subscriber line to another can be described as follows: for example, it will be assumed that the subscriber of set A (figure 15), whose number can be assumed to be 51, wishes to converse with the subscriber of set G whose number is supposed to be 99 and we will also assume, for ease of representation , that the two subscribers belong to the same group to which the machine mentioned above is assigned for the activation of the switch-

  <Desc / Clms Page number 12>

 tor;

   it must be understood, however, of course, that the office can have any appropriate or desirable importance, the only difference, generally speaking, between an office of one hundred subscribers and an office of ten thousand subscribers per example residing in the number of automatic switches that each given subscriber must use to connect his line to the line of another subscriber. With the arrangement shown, however, the subscriber 51 by removing his receiver from the hook-switch a, thus produces momentary contact of the protrusion a al of the hook-switch with the switch contact a2 (Fig. 12). ).

   As can be seen, this momentarily earths the line conductor 1 of the subscriber, the earthed circuit thus formed momentarily enclosing this line conductor, the conductors a3, a4, the hook-switch, the contact a2 , the conductor a5, the contacts a6, a7, towards the earth at a8. In this way, the removal of the receiver automatically earths one side of the calling subscriber line, resulting in the relay coil 7 (Figure 15), which is one of the two coils of the calling party. relays 6 and 7 - normally in bridge between the conductors of the subscriber line, and normally connected at their midpoint to contacts 8, 9 and 10, the last of which is connected to an ungrounded blade of battery 11 - is energized enough to attract armature 12.

   In other words, momentary grounding of the subscriber line completes a temporarily grounded circuit, enclosing coil 7 as well as battery 11. When so energized, the line relay of the subscriber attracts his frame 12 and causes the normally separate contacts 3, 4 and 5 to be brought into engagement with each other. It can be seen that contact 5 is connected to earth (figure 1). As can be seen this completes a circuit from earth through contact 3 from conductor 17 to relay coil 15, thence through conductor 19, contact arm 24, contact arm 21. , the relay coil 25, the conductor 26 to the ungrounded battery blade 11 and

  <Desc / Clms Page number 13>

 from there back to earth.

   In this way, the energization of the subscriber's line relay is instantly followed by the energization of the internal relay coil 15, which causes this relay to attract its armature, and is followed by the energization of the relay 25. , which also attracts its frame. At the same time that these circuits are formed and that these relays are energized, another circuit is however closed from the earth by the contact arm 4 to the conductor 18, thence by the internal relay coil 16 through the conductor 19, by the contact arms 24 and 21, by the relay coil 25 and by the conductor 26 to the battery 11 and then to the earth.

   It is evident that with the arrangement shown, when the internal relay coil 16 is energized, it causes its armature 14 to break contact with the contact tip 27, and when the internal relay coil 15 is energized. excited in the manner described, it attracts its armature 13 which forces the latter to cut off contact with the contact tip 28. At the same time, the excitation of the relay coil 25 forces its armature to come into engagement with it. contact tip 30, which closes a circuit as follows: from battery 11 through conductor 26, through contacts 30 and 29, through rotating magnet coil 31, thence through circuit break contacts normally engaged, 33 and 32, to earth and back to battery.

   When this rotating magnet is thus excited, it attracts the armature 135b which forces the latter to separate the contacts 32 and 33 and thus allows the armature to be instantly released. As will appear more clearly in the following, the construction of the rotating magnet is such that each time its armature is released, it causes its pawl to engage with a tooth of the ratchet wheel of the switch shaft, shaft to which is attached a spring wiper or contact brush 35, the latter normally resting on a series of contact teeth or switch contacts arranged in a circle.

   As a result, as the I35b armature is alternately attracted and released, as a result of the rapid action

  <Desc / Clms Page number 14>

 closing and opening that it produces in the coil 31, the spring wiper 35 receives a rapid movement by jerking on said contact teeth or switch contacts. The spring slider 35 is, as shown in figure 1, included in a circuit, and when it performs the first rotary advance, the cam 34 which is attached to the same shaft breaks contact with the spring 21 this which allows the latter in turn to cut off contact with spring 24 and to close contact with spring 20; at the same time, this allows the contact arm 22 to come into contact with the spring or switch contact 23.

   The contact springs or switch arms or contacts 21 and 20 serve to establish, when joined, a circuit to earth through the relay coil 36, which is on the same coil or the same. magnet than winding 16, by corresponding winding 37 on the next coil or magnet and from there by all the corresponding coils of the sixteen other magnets shown in figure 1, by conductor 38, contacts 20 and 21, coil 25, conductor 26, to battery 11 and thence to earth.



   The windings 36, 37, etc., in all eighteen magnets are preferably connected in series and they are of such construction that the attractive force of their cores or pole pieces is comparatively minimal, so that the frames 14 and 13 which, as will be recalled, are already in contact with their respective pole pieces or their magnet cores, are retained in contact with them, but that none of the frames of the sixteen magnets relay is attracted.

   The frame 29 of the relay 25 is however retained in contact with its pole piece or its magnet core, which maintains the continuity of the previously closed circuit passing through the rotating magnet 31 and its break contacts. circuit 32 and 33; in this way, this rotating magnet continues to rotate its shaft and thus keeps the spring slider 35 in motion until it stops.

  <Desc / Clms Page number 15>

 until the latter has made a complete turn.

   It is evidently seen that the cam 34 also makes a complete revolution at the same time as the wiper and that when it returns to its starting point, it again establishes contact with the contact arm 21, which presses the latter out of engagement with contact arm 20 and again closes contact with arm or spring 24, and this cuts off the described circuit going from earth through windings 36, 37, etc., in series, through the other relay coils in series, through conductor 38, contacts 20 and 21, relay coil 25, conductor 26 to battery and to earth.

   When this circuit is broken, the relay coil 25 instantly allows its armature to return to the normal position, which cuts off the contact between this armature 29 and the contact 30 and thus opens the circuit by the rotating magnet 31, At the same time, however, the armature 14 of the relay coil 16 returns to its normal position engaged with the contact tip 27, and the armature 13 of the relay 15 returns to the normal position engaged with the contact point. - contact te 28.

   During the time that the spring wiper 35 performs its rotation from the starting point on the contact 100, certain other operations are however carried out of course; Regarding these additional electrical operations and actions, the following preliminary explanation should be given: The wipers or switch arms 101, 102 and 103, shown in figure 1 are schematic representations of the spring wipers shown in figures 3 and 4 and described in more detail below. These spring wipers are mounted on a different shaft from that on which the spring 35 previously described is mounted; but this second shaft is also rotated in a jerky manner by means of the rotating magnet 104 and its armature 107 which are shown in Figures 1, 3 and 4.

   This rotating magnet 104 actuates, through its frame, a ratchet and ratchet wheel mechanism similar to that actuated by the rotating magnet.

  <Desc / Clms Page number 16>

 tif 31. Accordingly, whenever armature 107 is pulled down against its pole piece or core, the pawl is pulled back enough to engage a new tooth of the wheel. ratchet, and when the armature is then released, the spring tension is such that the pawl pushes the ratchet wheel forward, in a circle, until it hits the screw of the ratchet. stop 108.

   The adjustment and position of the stop screw 108 is preferably such that when the pawl rests against it the ratchet wheel is immobilized with the shaft in a position such that the spring rubbers 101 , 102 and 103 rest in contact with one of the ten series of contact teeth arranged in a semicircle as shown in FIG. 4. The method of fixing these rubbers to the shaft as well as the method of isolating the rubbers one in relation to the other are shown in FIG. 7 and will be described in detail in the following.

   Referring now to Figures 1, 2 and 13, it can be seen that the ten sets of contact teeth such as the 109, 113 and 117 series, the 110 series, 114 and
118, series 111, 115 and 119, etc., are each connected to one of the ten automatic preliminary connectors shown to the left of FIG. 2 and which have already been discussed previously. For ease of representation, only a series of these different connections has been shown. The contact tip 109 is shown connected to the conductor 121; contact point 113 to conductor 122 and contact 117 to conductor 123.

   These three conductors lead to the so-called preliminary connector or to another suitable automatic switch shown in FIG. 2, this preliminary connector being provided only with a vertical magnet and a rotating magnet 144a and 145, as well as a magnet. release, with, of course, armatures, pawls, stops, etc., suitable for giving the shaft a jerky vertical movement and a jerky rotary movement.

   As has been shown, the arrangement of the circuits is such that the spring wipers 101, 102, 103

  <Desc / Clms Page number 17>

 never come to rest, except for a short time, on a series of contacts connected to a preliminary connector which is occupied or already in service, and the circuits and means which prevent these wipers from stopping on a series of occupied contacts are established as follows:

     it will be assumed for example that for some reason these wipers 101, 102, 103 must be moved and put in position so that the wiper 101 touches the contact tip 109, the wiper 102 touches the contact 113 and the wiper 103 touches the contact 117, it being understood that these three contacts constitute one of the ten series of contacts forming part of the fixed contacts and of the switch contacts shown in FIG. 4; It will also be assumed for the present explanation that the preliminary connector K shown in Figures 2 and 13 (which is the preliminary connector connected to these three fixed contacts) must be found occupied.



  In such cases, the spring contact arm 124 of this preliminary connector rests against the contact tip 125 which closes the connection between earth and contact 109 by means of the conductor 121 and thus establishes a guard potential on the contact point. contact tip 109 as a result of its temporary connection to the earthed pole of the battery or other current source.

   As a result, when the wiper 101 meets the contact tip 109, a circuit is closed from earth by the conductor 121, the contact tip 109, the spring wiper 101, the conductor 126, the contact arms 106. and 105 and by coil 104 to the battery and to earth; this forces the rotating magnet coil 104 to attract its armature and, by means already described, causes the shaft to which the spring wipers 101, 102, 103 are attached to be instantly rotated; these rubbers are thus brought out of contact with the tips 109, 113 and 117 and come into contact with the tips 110, 114 and 118.

   If these last-mentioned fixed contacts were found to be occupied, the operations which have just been described would be repeated instantaneously.

  <Desc / Clms Page number 18>

 to bring the spring wipers to another position. In order to be able to better understand the circuits, it will be assumed that when the operator or the subscriber of station 51 begins to make the call, which forces the spring-loaded wiper 35 to make a full turn on its contact points, as already described, the wiper 101 rests at this time on the contact tip 109, the wiper 102 on the contact tip 113 and the wiper 103 on the contact tip 117, that the preliminary connector switch K is in. its normal position and ready to receive a call from the switch actuation machine shown in Figure 1.

   If these conditions are met when the calling subscriber picks up his receiver, which forces the wiper 35 to make a complete revolution on its fixed contacts - all this obviously taking place in an instant - the following operations occur: It will be recalled that when the spring wiper moves leaving the contact tip 100, the cam 34 leaves the contact arm 21, which allows the contact arm 22 to engage the arm. As soon as this occurs, a circuit is closed from earth through contact arm 23, contact arm 22, conductor 129, rotating magnet 104 to the battery and to earth.

   This naturally causes the rotating magnet 104 to attract its armature and to hold the latter in the attracted position until the spring slider 35 has completed its rotation, which allows the cam 34 to come into contact again. tact with the arm 21 and thus open the circuit between the contact arms 22 and 23.

   When this happens, the rotating magnet 104 releases its armature; By means of the ratchet and ratchet device described above and explained in more detail below, the spring wipers 101, 102 and 103 are moved forward, by one advancement, and come onto the contact tips 110, 114 and 118, so as to be ready for the next call from the switch actuation machine; but these rubbers obviously remain on the contact points 109,

  <Desc / Clms Page number 19>

 
113 and 117 while the spring wiper 35 is rotating.

   As the spring-loaded wiper receives a jerky forward movement on its contact tips 100, 131, 132,
133, etc., on all series of fixed contacts in the row and until the moment it rests on each new contact tip, it is obviously connected to earth by the conductor
134a, the contact arm 33 and the contact arm 32.

   As can be seen, this is because each time the wiper 35 lands on a contact tip the armature 135b is moved away from the core or pole piece of its magnet, and each time the armature 135b is attracted against its core or its pole piece, the contact is thus cut between the arms 33 and 32, which has the result that the contact arm or the scrubber 35, passing over its teeth, is also momentarily connected to earth when it rests on each tooth during its trajectory.

   The effect of this action is easily understood, because when the contact arm or the wiper 35 rests on the contact tip 131, a circuit is thus closed from the earth by the contact arm 32, the contact arm 33, the conductor 134a, contact arm or slider 35, contact tip 131, conductor 144, vertical switch slider 103, contact tip 117, conductor 123, vertical magnet 144a (Figure 2), conductor 146, to battery 11 and to earth. Closing this circuit obviously results in the emission of a pulse in the vertical magnet 144a, which obliges the latter to raise the shaft of the switch K.

   Switch wiper 35 obviously passes over contact 132 where it again closes a circuit and emits another pulse in vertical magnet 144a of this preliminary switch connector K. This last circuit goes from earth through wiper 35, contact tip 132, conductor 136a, contact tip 147, contact arm 140, conductor 135a, conductors 144 and 128, vertical switch slider 103, contact tip 117 away from the conductor

  <Desc / Clms Page number 20>

 
123 to the vertical magnet 144a of switch K and to the battery.

   At this moment, the spring wiper 35 passes over the contact point 133 where it effects the transmission of another impulse by the vertical magnet 144a, the circuit being closed at this moment by the contact point 133, the conductor 137a, contact tip 148, armature 141, contact tip 147, armature 140, conductor 135a, contact tip 131, conductors 144 and 128, to vertical wiper 103, etc. like before.

   In this way, when the wiper 35 passes over the contact tip 134, another electric pulse is transmitted through the vertical magnet 144a, and this time the circuit encloses the contact tip 134, the conductor.
138a, contact tip 149, armature 142, contact tip 148, armature 141, contact 147, armature 140, conductors 135a, 144 and 128, vertical wiper 103, etc,
The spring-loaded wiper 35 moves to the contact tip 135 where it again transmits an electric pulse through the contact tip 135, the conductor 139, the contact tip 150, the armature 143 , the contact tip 149, the frame 142, the contact tip 148, the frame 141, the contact tip 147, the frame 140, the conductors 135a, 144 and 128, the vertical wiper 103, etc .;

   it is understood that from this point each circuit passing through the vertical magnet 144a is the same as the others. As mentioned, the spring wiper 35 contacts the switch tip 136; but from this point it does not and cannot effect the transmission of another "vertical" impulse in the vertical magnet 144a.

   This is obviously due to the fact that the armature 13 of the coil 15 is, at this moment, attracted, which breaks the contact with the contact tip 28 so that the spring wiper 35 is then and from. this place unable to effect the transmission of other "vertical" impulses and does not cause the transmission of any impulse from any input until it passes from the

  <Desc / Clms Page number 21>

 contact tip 137 on contact tip 138; when this occurs, it begins to emit "spinning" pulses in the "spinning line" to the rotary magnet 143 of the preliminary connector switch K.



   It can now be seen that five pulses corresponding to the first digit of the number of the calling subscriber have been transmitted by the vertical magnet 144a of the primary connector switch K, which has caused the rubbers of this preliminary connector to rise up to 'to the appropriate stages - that is to say up to the points where these rubbers are in front of the fifth row of contact teeth and are thus made ready to enter their stages as soon as pulses " Rotors "are initiated into the rotary magnet of the switch, and it is seen that a" rotary "pulse is transmitted as soon as the spring-loaded wiper 35 reaches the contact tip 138, a circuit thus being closed momentarily as follows:

   Ground through contact arm 32, contact arm 33, conductor 134a, spring wiper 35, contact tip 138, conductor 127, rotary wiper 102 of the switch actuating machine, contact tip 113, conductor 122, rotating magnet 145, conductor 146, to battery 11 and earth, causing a single "rotating" pulse to be emitted in the rotating magnet 145, the construction of which is such, as will appear more clearly in the following, that it forces the switch shaft of the preliminary connector to perform a rotary advance, so that the shaft rubbers 151 and 152 are brought in contact with the switch points 154 and 153 of the row of fixed contacts assigned to this switch;

   private wiper 155 is also brought into electrical contact with the tooth or the contact tip 56 of the so-called “private” row of fixed contacts of this switch. At this moment we see that the preliminary connector switch K has completed its operation after placing the line wipers 151 (and 152 on the first series of con-

  <Desc / Clms Page number 22>

 fifth row or fifth stage tacts in the row contact group; Note that this group is formed of pairs of contacts, each pair consisting of two contacts connected to opposite sides of a subscriber line.

   In other words, a connection is established with the series of contacts which corresponds to the number of the calling subscriber, which completes the connection of the incoming lines coming from telephone set 51, by conductors 157 and 158. , line rubbers
151 and 152 to the trunk line conductors terminating at a first regular selector or, as shown in Figure 15, a regular connector or other suitable switching apparatus.

   It can be seen that at this moment a circuit is also established by the bridge interrupt relay 159 (figure 2), this circuit going from the earth by the private wiper 155, the contact tip 156, the relay coil 159 towards battery 11 and earth, which causes the core of coil 159 to attract the armature 159a and produces the maintenance of this armature in its attracted position until the preliminary connector K is finally released and brought back to the normal state after the conversation has ended.

   When the bridge interrupt relay 159 attracts its armature, - and it must be understood that one of these bridge interrupt relays can be assigned to each subscriber line and made specific to this line-, it cuts off the contact between the contact springs or the contacts 8, 9 and 10, which opens the normally closed bridge between the line conductors 1 and 2 coming from the telephone set 51, this bridge containing the coils or windings of the relays of line 6 and 7 normally connected to the battery through these contact arms, and this leaves the line of the calling subscriber free from bridges of this nature and puts the line in condition for the subscriber 51 activates the first regular selector, the second selector, the third selector, etc., and the usual regular connector, or else, as indicated,

     'calling subscriber can then do

  <Desc / Clms Page number 23>

 simply operate a known connector switch as shown in Figure 15 and obtain direct communication with the line of the called subscriber without using any selector.



   It can also be seen that after leaving the contact tip
138, the wiper 35 continues in the previously described manner until it returns to the contact tip 100; at the same time, the cam 34 also returns to its initial position, which moves the contact arm 21 away from the contact arm
20 and engages it with the contact arm 24, also cutting off the contact between the arms 23 and 22.

   It is obvious that in the arrangement shown, when the contact 21 is detached from the arm 20, it serves to open the circuit previously described going from the earth to the coils 36 and 37 and to all these coils in series, as shown in Figure 1; having been produced, the armature 14 naturally returns to its initial position in engagement with the contact tip 27 while the armature 13 of the coil 15 returns to its initial position in engagement with the contact tip 28. We see however that this circuit also contains the relay coil 25 and, consequently, that the latter releases its armature, which cuts the contact between the contact arm 29 and the contact tip 30 and in this way opens the circuit coming from it. earth and passing through the rotating magnet coil 31.

   This obviously results in putting the wiper 35 at rest on the contact tip 100, where it remains until a new call arrives from another telephone set of that particular group of subscribers, or any other subscriber of the office in the case where the importance of the office is of the kind indicated in the drawings.

   It should be remembered however that another circuit is cut or opened - namely: the circuit by the rotating magnet 104 - as a result of the separation of the contacts 22 and 23; consequently the magnet 104 releases its frame, after which the pawl of the frame 107 engages with the shaft carrying the spring wipers 101 and 102 and 103 and thus advances the latter until they engage

  <Desc / Clms Page number 24>

 with the tips 110, 114 and 118, ready to receive the next call coming from the call slider 35 under the effect of the removal of a telephone receiver from its hook by another subscriber,

   or under the effect of a current transmitted in any other suitable manner for the purpose of producing the connection operations which are of a more or less preliminary nature and which must occur before the electrical impulses representing the digits of the called number can pass through the relays or magnets of a selector switch or of a connector switch or of these two types of switch as appropriate.



   The method of calling the desired number can be done as follows: in FIG. 14, the connector mechanism is shown and in FIG. 15 this connector is shown in service between two subscriber stations. After the subscriber 51 has obtained, in the manner explained above, a connection to the trunk line L leading to the free connector, the calling subscriber then actuates his calling device, for example the keys or the buttons al6 and al7 ; it is of course understood that in practice the calling device may be of any suitable construction known or deemed suitable, and that these keys or buttons are merely shown for ease of explanation.

   When the key or the button al6 is lowered, it is obvious that the line conductor 2 is connected by the contact tip al8, the conductors al9 and a5, the contacts a6 and a7 to the earth at a8; in a similar way, when the key or the button al7 is lowered, the line conductor 1 is connected to the earth by the contact a20 and from there by the same conductive path which has just been described in connection with the updating. the earth of line conductor 2. In FIG. 15, A represents the equipment of the calling subscriber and B that of the called subscriber. The strong lines represent the conversation circuit, that is, the circuits for the voice currents.

   Relays or other devices included between the dashed lines

  <Desc / Clms Page number 25>

 broken 1-1 and 2-2 belong to the preliminary connector in service between the two subscriber lines. Relays, magnets and switching devices etc. included between chain lines 2-2 and 3-3 belong to the connector which is shown in service between the two lines. The devices shown to the left of line 1-1 are specific to the line of the calling subscriber. Similarly, the devices shown to the right of line 3-3 are specific to the called subscriber's line.

   If the called subscriber number is 99, the calling subscriber first lowers the switching key a17 nine times, which emits nine separate pulses in the "vertical" line conductors 1 and 157, and in the re- vertical leave m84 because of the connection thus produced between conductor 1 and earth at a8, and this relay and the ungrounded pole of battery 11 by means of suitable conductors, as shown for example in the figure 15. The vertical relay in turn closes the circuit nine times which includes battery 11, vertical magnet m23, side switch friction contact m67, friction contact m68, contact springs m54 and m52 and the conact springs m90 and m92 towards the earth in m93 and return to the battery.

   The first pulse releases the connector locking tabs because hook m27 lifts release bar m19 away from pin m17. and the nine separate pulses jerk the shaft upwardly to the ninth stationary contact stage, which brings the shaft's private, vertical, and rotary wipers into the desired position. The calling subscriber then presses the switching key a16 once, so as to ground the "rotating" line conductor only once, which emits a single pulse in the "private magnet" m40 of the connector.

   When this magnet is energized and then de-energized, it allows the finger m58 to release a tooth under the influence of the spring m59 and thus move the side switch rubbers from the first position to the second.

  <Desc / Clms Page number 26>

 



   The calling subscriber then presses the key a17 again nine times so as to emit nine distinct pulses in the "vertical" line conductor 1; but this time, as a result of the movement of the wiper m66 as far as the contact m68, these pulses excite the rotary magnet m34 as a result of the circuit arrangement provided and shown in figure 14. The nine rotary pulses thus printed to the connector shaft by the rotating magnet bring the wipers ml, m2 and m3 in the desired position, that is to say in the correct position to establish a connection with the normal line and "private" conductors connected to the called subscriber's line as shown in figure 15.



   After this, the calling subscriber again presses the key al6 once and thus again energizes and de-energizes the private magnet m40 of the connector. This private magnet allows the m58 finger to produce the escapement and to move outward until it meets the m60 stop, the movement of this side switch having been first limited by the engagement of the projection m121 with the cam mll. Final operation of the side switch in this way moves the side switch wipers away from the second position and puts them in the third position, which connects the line conductors L to the conductors ending in the vertical and rotary wipers m2 and m3. , which are now in engagement with the fixed contacts connected to the normal line conductors terminating at the called subscriber line.



  The final operation of the side switch in this way also makes it possible, by lowering the key al2, to connect the earth a8 to the vertical line conductor 1 of the line of the calling subscriber, and thus to start ringing current. in the completed line circuit between the two subscribers by continuation of the contact of the m66 wiper with the third contact m69.



  When the calling subscriber presses the ringing key in this way, a circuit is formed from earth, as indicated, through conductors 1 and 157, through vertical line relay m84, to battery 11 and then to the earth; closer

  <Desc / Clms Page number 27>

 obviously che the springs m90 and m92, which closes a circuit of the earth m93 by the springs m52 and m54, the wiper m66, by the bell relay ml04 and from there to the ungrounded pole of the battery. The ringing relay thus excited attracts its armature and thus opens the line circuit existing between the two subscriber lines and at the same time it bridges the ringing generator m112 on the circuit.

   The ringing current thus launched in the called subscriber line causes the ringing to operate at set B. While calling the desired number, it can be seen that the pulses sent by vertical line 1 energize the vertical relay m84, which closes the local circuit enclosing the vertical magnet m23, as shown in figure 14; in this way, the line pulses are repeated, so to speak, from the line circuit into a local circuit including the vertical magnet. Similarly, the electric pulses sent by the line conductor 2 are repeated by the rotary line relay m85 in a local circuit including the private magnet m40, as also shown in figure 14.

   As explained however, the next group or series of pulses sent by the vertical line is repeated by the vertical line relay m84 in a local circuit containing the rotating magnet m34 as a result. of the displacement of the side switch as explained. The final impulse launched in the rotating line is repeated by the rotating relay in the local circuit enclosing the private magnet, so as to cause the displacement of the side switch to the third position as explained, and because of the circuit arrangement shown more clearly in Figures 14 and 15.

   The fact that the private slider ml touches a contact connected to the called subscriber line's bridge interrupt relay causes this relay to be energized, which removes the bridge from this part of the circuit. In addition, since the private wiper ml is now connected to the grounded contact m72, it produces a guard potential on the multiples of the contact with which it

  <Desc / Clms Page number 28>

 remains engaged during the conversation between two subscribers; in this way no other connector can be actuated by other subscribers so as to establish a connection with fixed contacts connected to the line of the called subscriber.

   While the two subscribers are in conversation, the grounded slider 155 also produces a guard potential at all fixed connector contacts assigned and connected to the calling subscriber's line. In this way, the private shaft wipers of the connector and also of the preliminary connector have, so to speak, a dual function, in that they complete circuits to energize the bridge interrupt relays, and that 'in addition they connect the private fixed contacts in multiple in the subscriber lines to the earthed pole of the battery so as to prevent the calling line or the called line being taken in service while the two subscribers are in conversation.

   If the line of the called subscriber is busy when the calling subscriber initiates the pulses representing the last digit of the called number, it is obvious that the connector is instantly and automatically released. This results from the fact that when the private slider ml encounters an occupied contact, with the side switch still in the second position, a circuit is immediately formed from the earth by the normal private conductor connected to the occupied line, by the private slider ml, the side switch slider m65, by the springs m53 and m55, the private magnet having been energized by the final single pulse, thence by the release magnet m79 to the ungrounded pole battery earth 11.

   With the release magnet energized in this manner, the locking pawls are withdrawn from the teeth of the ratchet wheel and the switch shaft is allowed to assume its normal position.



  When the calling subscriber then presses his ringing key, the single pulse thus transmitted, instead of operating the called subscriber's ringing, energizes the vertical relay and thus produces the excitation of the vertical magnet, with this result

  <Desc / Clms Page number 29>

 that the tree receives a vertical advance. As can be seen, this is sufficient to close the contacts m7 and m8 to each other and thus to close a busy signal circuit going from the busy signal machine W (figure 15 ) through these contacts and through the side switch slider m64 to the rotary line conductor 2 through the receiver of the calling subscriber and back through the other side of the circuit in the well known manner.

   If, on the contrary, the line of the called subscriber is not busy, the communication between the two lines is established and the circuits are completed as shown in Figure 15.



   The mode of release of the switches after the subscribers have finished speaking is as follows: Each of the subscribers can release the switches, but it will be sufficient to assume that the release is made by the subscriber of set 51. In such a case , the subscriber 51, who was the calling subscriber, simply hangs up his receiver alO on the hook-switch a, so that the projection a21 of the hook presses together the three normally separated contacts a22, a23 and a24, this which completes a connection from both sides of the line to earth through conductor a5, as shown in figure 12.



   This energizes the "vertical" and "rotary" line relays of the connector, because of the circuit arrangement shown and described, and thus closes a circuit from the ungrounded pole of battery 11, through suitable conductors, by the release magnet m79, by the springs m88 and m89, by the release relay k to earth and from there back to the battery. With the release magnet and the release relay thus energized, the connector mechanism is released in the manner described and a local circuit is also closed to the calling preliminary connector; this local circuit contains the release magnet k1 which promptly releases the mechanism of the preliminary connector.

   The two switches having thus been returned to their normal positions, the apparatus is ready for operation.

  <Desc / Clms Page number 30>

 be used in establishing other communications. The called party can also detach the connector from his own line by replacing his receiver on the hook-switch and thereby momentarily ground both sides of his line in the manner described for switch A. When this is done, the reverse release relays m96 and m97 are energized because of the circuit arrangement shown, these two remakes remaining, while the subscribers are in conversation, bridging the circuit with their midpoints re - linked to the ungrounded pole of the battery 11.

   When these two relays are energized, they attract their armatures and thus produce the closure of the circuit containing the release magnet m79. It can be seen that this circuit, shown in FIG. 14, extends from earth m103 through springs m101 and m100, through the release magnet m79, to battery 11 and again to earth. This obviously produces the release of the connector and returns the latter to normal in the manner already described.



     The private magnet m40 of the connector is thus only used with a view to releasing when an automatic release must be produced because of the meeting of occupied contacts, by the shaft wipers of the connector.



   It has been shown how a subscriber of a hundred-line office operates the apparatus to establish a communication with a second subscriber. We will now show how a communication is established in a system of a thousand lines. Referring to FIG. 17, it can be seen that the junction line conductors LL of the preliminary connector or pre-selector switch terminate at the first selector N instead of terminating at the connector M as shown in FIG. 5. sees that the trunk line conductors L1 and 12 which start from the fixed contacts of the first selector N and which are similar to the conductors LL terminate in the connector switch M (figure 15).

   If subscriber A (figure 17) wishes to establish a call with the subscriber whose number will be assumed to be 299, @

  <Desc / Clms Page number 31>

 the central office switches are actuated as follows: When the calling subscriber's receiver is removed from the hook, a preliminary pulse is transmitted to line conductor 1 and a preliminary connector is actuated in the manner explained to establish a communication with line conductors 1 and 2 and thus extend the substation conductors to the first N selector.

   When the subscriber activates the call device for the first digit 2, the "vertical" line conductor 1 is grounded twice and the "rotary" line conductor 2 is grounded once. one time.' Grounding of the vertical line conductor closes a circuit through vertical line relay n16 of the first selector switch, this circuit extending from ground a8 through push button spring a17, conductors 1 and 157 , the shaft slider 152, the conductor L, the side switch n5, the contact tip n24, through the vertical line relay n16 to the battery conductor and thence through the battery 11 to earth. The vertical line relay operates by energizing to close springs n18 and n19 in contact with each other, which closes a circuit through vertical magnet nl.

   The vertical magnet operates in the usual manner to lift the shaft rubbers nll, nl2 and nl3 of two advancements to the position opposite the second stage, in which are located the ends of the connecting lines leading to the switches connectors. When the key or button a16 is pressed, the "rotary" line conductor 2 is earthed and an excitation current flows through the rotary line relay n17, going from the earth a8 through the key. a16, conductors 2 and 158, shaft slider 151, conductor L, side switch wiper n6, contact tip n25, through rotary line relay n17 to the battery conductor and from there through battery 11 to earth.

   The rotary line relay presses in contact with each other, energizing, the springs n19 and n20, which then closes a circuit through the private magnet n4. In

  <Desc / Clms Page number 32>

 energizing, and de-energizing, the private magnet allows the side switch walkers to shift from the first position to the second. When the side switch slider n7 meets the contact tip n26, an excitation circuit is established by the rotating magnet nl4 and this magnet functions in the usual manner to drive the shaft wipers nll, nl2 and n13 to the contacts of the first free junction line which will be assumed to be the line containing the conductors L1 and L2.

   When the subscriber activates the calling device for the last two digits 9 and 9, the connector switch :: (figure 15) is activated in the manner explained above, to establish communication with the normal conductors terminating at the end. station B. The two stations are thus connected and the conversation can be carried out by the circuit indicated by means of the strong lines in figures 17 and 15.

   A difference in the layout of the central office switches, in the thousand-line system and the 100-line system explained previously is the addition of the first selector N between the preliminary connector and the connector switch M La li- Switching of the central office switches occurs when the calling subscriber places the receiver back on the hook, which grounds both line conductors 1 and 2 and simultaneously energizes the "vertical" and rotary line relays "m84 and m85 of the connector switch M, relays which function to close an excitation circuit passing through the release relay n23 of the selector N in series with the release magnet n79 of the connector.

   The connector release magnet operates, energizing, in the usual manner to return the switch to normal. The release relay n23 operates, by being energized, to close an excitation circuit passing through the release magnet n3 of the selector N in series with the release relay k of the preliminary connector switch The release relay k functions to in turn close an excitation circuit by the release magnet kl. The magnets

  <Desc / Clms Page number 33>

   release and the relays thus energized de-energize and operate to return their respective switches to the normal position when the connection to line conductors 1 and 2 is removed.



  When the central office is set up as a ten thousand line system a second selector E (Figure 18) is added and the number of called subscriber B can be assumed to be 2299.



  Calling subscriber A operates the preliminary connector and the first selector N in the usual manner, but selector N instead of choosing trunk lines terminating at connector switches, now chooses trunk lines L1 and L2 which terminate at the switch second selector E (Figure 18), and second selector E in turn operates to choose trunk line conductors L3-and L4 which terminate at connector switch M.

   The earthing of line conductors 1 and 2 for the second digit of number 2299 activates the second selector E to extend conductors 1 and 2 from the substation to the junction line conductors L3 and L4 leading to the M connector (figure 15), and the connector is in turn actuated by the pulses for the last two digits in order to extend the communication to the normal conductors of line 1-2 of station B. The communication extends through the M connector which existed in the hundred line system, by the first N selector which was added for the thousand line system, and by the second E selector which is now added for the ten thousand line system.



  When the central office is arranged on the hundred mile basis, a third 0 switch is added to the series of switches employed in the ten mile system. Subscriber extension numbers must contain five digits since there are three digital switches, besides the connector, which must be operated by the calling subscriber. It will be assumed that the line number of the called subscriber is 22299. The subscriber calls @

  <Desc / Clms Page number 34>

 Peeling A (figure 17) operates the preliminary connector and the first selector N in the usual way.

   The selector N is then actuated for the first digit (2) to choose trunk line conductors L1 and L2 which terminate in a second selector E (figure 18) and the second selector
E is in turn actuated for the second digit (2) in order to choose the junction line conductors 13 and L4 which lead to the third selector 0 (figure 19). When the subscriber continues the call, selector 0 is operated for the third digit (2) to choose a free trunk L5 and
L6 which terminates in connector M. The earthing of line conductors 1 and 2 by the calling subscriber for the last two digits (9 and 9) makes the connector M operate in the usual way to extend the connection until 'to normal conductors 1 and 2 of substation B.

   The two stations A and B are then in communication, the communication extending from station A through conductors 1 and 2, through the preliminary connector or preselector K, to the first selector N (figure 17), through the second selector E (figure 18), the third selector 0 (figure 19) and finally by the connector switch M to the line conductors 1 and 2 which lead to the desired station,
The release of the central office switches is produced when the calling subscriber puts his receiver back on the hook-switch, which grounds both line conductors and simultaneously energizes the "vertical" line relays. and "rotary" of the connector switch M, which functions to close a series excitation circuit passing through the release relay behind the selector switch E and the release magnet m79 of the connector.

   When energized, the release relay el operates to close an excitation circuit by the release magnet e2 of selector 2 in series with the release relay n23 of the first selector N. The release relay selector n23 then operates to close a circuit passing through the release relay k in series with the magnet of

  <Desc / Clms Page number 35>

 release n3, and the release relay k, by energizing, in turn intervenes to energize the release magnet k1 of the preliminary connector. All magnets and relays included in the release remain energized until the earth connections to the line conductors are removed.



   The connector shown in Figure 14 is of the type described and shown in patent number 815176, issued in America March 13, 1906 to Keith, Erickson and Erickson. The preliminary connectors described here are also similar in terms of mechanical construction and mode of operation to the switch described in this patent. The subscribers' devices, in particular the calling device, or the device for operating the various switches, is of the Strowger type well known for this application, the usual pulse emitting device being represented schematically by the buttons - push buttons al6 and a17.



   The mechanical construction and arrangement of the electrical circuits of the switch actuating machine shown in Fig. 1 and also in Figs. 3 to 10 inclusive, have been chosen as follows: Note that telephone 51 is simply one member of a group of one hundred telephones or one hundred subscriber stations, or some other smaller number, eighty-one being the number of telephones or subscriber stations shown in Figure 1.

   We see in this diagram that the smallest number for each station is eleven while the highest number is ninety-five; it can also be seen that only the three contact arms corresponding to the contact arms 3, 4 and 5 have been shown for each telephone set or subscriber set, but it is understood that a line relay is associated with each of these eighty-one sets of contact arms. It can also be seen that the relays 160 and 164 and all those included between these two relays constitute what can be called the vertical relays of the switch actuating machine, in the sense that they control the various circuits.

  <Desc / Clms Page number 36>

 fired by which the vertical pulses are transmitted by this machine to operate the vertical magnets of the preliminary connectors.

   On the other hand, relays 16 and
168 and all the relays between these two particular double-wound relays constitute what may be called the rotary relays of the switch actuating machine, in the sense that these particular relays control the various circuits by which this machine transmits the rotary pulses to operate the rotary magnets of the preliminary connectors. Accordingly, the nine relays to the right of line X-Y represent the first digits of the subscriber numbers in that particular group, while all of the relays to the left of that row represent the second digits of those numbers.

   For example, if the subscriber
11 removes his receiver, the result would be the excitation of relays 16 and 160, that is to say of the internal coils of these two relays; in such a case, the switch actuator first emits a vertical pulse, and then a rotary pulse, which effectively calls the number of the calling subscriber. Likewise, if the subscriber 99 removes his receiver from the switch hook, the result would be the energization of relays 168 and 164 and in this case the switch actuation machine first transmits nine vertical pulses to the free preliminary connector. which waits, and then nine rotary pulses.

   In other words, each relay located to the left of the X-Y line is common to nine subscribers whose numbers all end with the same digit; example relay 16 is common to all subscribers, whose numbers end with the digit 1. In a similar manner, each relay located to the right of line XY is common to nine subscribers whose numbers all begin. by the same number; for example the relay 160 is common to all the subscribers of the group whose numbers begin with the digit 1.

   With this arrangement, the first vertical relay cooperates with the first rotary relay or with any

  <Desc / Clms Page number 37>

 which other relay situated to the left of line XY, depending on the number of the calling subscriber, and in a similar manner, any other relay situated to the right of line XY cooperates with any relay situated to the left of this line following the number of the calling subscriber. Invariably then, if the first digit of the calling subscriber number is five for example, removal of the receiver at that subscriber station results in energizing the internal coil of the fifth vertical relay, but if in all In this case, the first digit of the calling party number is eight, for example, the eighth vertical relay is energized.

   On the other hand, and invariably, if the second digit of the calling subscriber's number is five, the result will be the excitation of the fifth rotary relay while if this second digit is eight for example, the eighth rotary relay is energized. It can be seen, however, that in all cases the excitation of a certain vertical relay, for example, causes only a certain number of the vertical contacts to receive and send pulses from the wiper 35 to the vertical magnet d. 'a preliminary connector, the number of contacts thus remaining in action corresponding to the number of the excited vertical relay, tan-. say that all vertical contacts above this number are made inactive to transmit pulses when encountered by this wiper.

   this is of course true for rotary relays in that energizing any particular rotary relay disables so to speak all rotary contacts above that rotary relay number, i.e. That is, if the third rotary relay is energized, only the first three rotary contacts remain in action while the other seven are made inactive due to the breach or gap produced in the circuits. It can be seen that the line relay contacts assigned and used to close an earth connection by any particular vertical relay are all mounted in a row.

  <Desc / Clms Page number 38>

 tiple together by means of one of the "horizontal" conductors shown in figure 1.

   Similarly, the line relay contacts which are assigned and used for closing a ground circuit passing through any particular rotary relay are all mounted together in multiple by means of one of the conductors. "vertical" shown, extending perpendicular to the "horizontal" conductors. It is therefore evident that each subscriber line in the group is provided with a double winding line relay as shown in Figure 2, and a bridge interrupt relay. switch contacts actuated by the latter, for example co-contacts 8, 9 and 10; each line relay there are also three normally separate contacts, such as contacts 3, 4 and 5.

   These line and bridge interrupt relays can of course be placed in any convenient or advantageous position, for example on a shelf of suitable construction. In any event, however, the subscriber lines are preferably divided into groups of one hundred or, if the arrangement is exactly that shown in the drawing, into groups of eighty-one each. As shown and described, a group of eighty-one subscribers could obviously constitute an entire office.

   As indicated previously, this group of eighty-one subscribers would have in common nine vertical line relays and also nine rotary line relays, and the same group would also have in common a switching mechanism such as that shown. in Figures 3 to 10 inclusive, the construction of the circuits has already been described. Referring more particularly to FIG. 3, it can be seen that the switch actuation machine comprises a frame or a suitable body F intended to provide the supports and supports for the various magnets and the operating parts. The shaft S for example, which carries the wiper 35, is supported in bearings s.

   As explained previously, this tree is

  <Desc / Clms Page number 39>

 provided with a ratchet wheel sl intended to be actuated by the pawl s2 which is pivotally mounted on the frame 135b of the rotary magnet 31. Referring to FIG. 8, it can be seen that the movement of this The pawl is limited, in its forward thrust, by means of an adjustable stop screw s3 introduced into part f of the frame. A spring loaded pawl s4 also engages this ratchet wheel and thus prevents the shaft S from rotating backwards.

   The ratchet s2 is pivotally mounted in s5 on the upper end of the armature arm s6 and is subjected to the appropriate tension of a spring which serves to keep it in engagement with the teeth of the ratchet wheel and to it. allow these teeth to slide backwards; this armature 135b is provided with a spring s7 applied so that the armature is normally spaced from the magnet 31, this spring s7 also constituting the means of positively actuating the ratchet device; The ratchet is in fact attracted when the magnet is energized and the ratchet wheel is rotated when the armature is released.



   The spring wiper 35 is set so as to describe a circle and during this rotation to slide over the contact teeth or the switch contacts which are arranged in a circle as previously described and which are each provided with 'a s8 terminal to make the necessary connections with the conductors leading to the contacts of the vertical and rotary relays. This spring wiper is preferably attached to an insulated hub s9 mounted on the shaft S, this hub being in contact with a brush or a spring arm slO; it can be seen that with this arrangement the conductor 134a (FIG. 1) can be fixed to the terminal of the brush slO and that in this way the necessary current coming from the earth pole to the battery 11 is transported to the wiper 35 without the shaft S is included in the circuit.



  The frame 135b also carries the isolated switch arm sll which is intended to operate the springs 31 and 32 for opening and closing the circuit, described previously; this switch arm is provided, at its end, with a lateral projection s 2 intended, when the armature is drawn, to first come into contact with the intermediate spring

  <Desc / Clms Page number 40>

 s13 (see figure 11) and then to place himself between this spring and the outer end of the spring 32 so as to press the outer end of the spring 33 to move it away from its position out of contact with the end of the spring. spring 32; it should be noted that an insulating part s14 separates the springs s13 and 33.



   When the armature is released, the part s12 again passes between the ends of the springs s13 and 32, which prevents the springs 33 and 32 from coming back into contact with each other until after the armature has been completely returned to its normal position. It should be understood, however, that any other suitable arrangement known or considered suitable may be employed to produce intermittent energization of the rotating magnet 31. As explained previously, the cam 34 is also mounted on the shaft S, this cam being in practice made of hard rubber or other insulating material. With the arrangement shown, this cam is substantially round and is provided with a single projection or a node s15 as shown in figure 9.

   Normally, this protrusion is in contact with the spring 21 in order to hold the springs
21 and 22 normally separated and also for the purpose of keeping the springs 22 and 23 normally separated, as shown in Figures 1 and 9; also sees that the springs 21 and 24 are normally engaged with each other. The cam 34 rotates in the direction indicated by the arrow and after releasing these springs, it makes one complete revolution at the same time as the wiper 35, before coming back into engagement with these springs and returning them to their normal state. . Referring again to FIG. 3, it can be seen that the shaft 1 is supported in bearings 1 and preferably arranged parallel to the shaft S.

   As explained previously, the spring wipers 101, 102 and 103 are all mounted on this shaft 1 and as shown more clearly in Figure 7, they are all isolated from each other and isolated from the shaft, but it is understood that these rubbers rotate at the same time as the shaft. Contacts

  <Desc / Clms Page number 41>

 fixed verticals of the vertical wiper 103 are provided with terminals it; the rotary fixed contacts of the rotary wiper 102 are provided with terminals i2, and the private fixed contacts of the private wiper 101 are provided with terminals i3.

   These fixed vertical, rotary and private contacts are arranged in the manner shown more clearly in FIG. 4 and are naturally all isolated from each other, the row thus formed being able to be removed at once. part and put in the form of a are of a circle Consequently, the wipers 101, 102 and 103 are preferably this so to speak with two ends, each wiper being provided with opposite ends intended to be placed and to circulate on the contacts assigned to it.

   In this way, each slider is set so as to rotate in the direction indicated by the arrow in figure 4, and to come into contact at one end with its assigned series of contacts immediately after leaving the last contact of this series by its other end; in other words, the opposite ends of each wiper are alternately engaged with the contacts, the arrangement however being such that while one end is in use the other end is out of service. The wiper 103 is isolated from the shaft and from the other wipers but it is in electrical contact with the hub or metal collar 103a.

   In this way, a brush or a spring contact 103b which bears on this hub or collar is employed to supply current to. this slider. The arrangement of the other two wipers is practically the same, the wiper 102 being provided with a hub or collar 102a and a brush or spring contact arm 102b, and the private wiper 101 is provided with a hub or collar 101a, engaged with a broom or a spring arm 101b. As explained above, these rubbers 101, 102, 103 all rest on contacts of the semicircular row II and consequently the rubbers of this switch are always in connection with a junction line. , occupied or not, and with the preliminary connector located at the end of this line.

   Motive power or propulsion

  <Desc / Clms Page number 42>

 to rotate the shaft 1 consists, as explained above, of the rotating magnet 104, the armature 107, the pawl 108a and the ratchet wheel 14. This armature is advantageously mounted to pivot in i5 and the pawl is fixed by a pivot at i6 to the arm of this frame which projects upwards.



   Resilient means i7, of any suitable nature, are employed to hold the pawl in position against the teeth of the ratchet wheel. An adjustable stop screw 108 limits the forward thrust or movement of this pawl, while a spring loaded stop pawl i8 engages the ratchet wheel and thus prevents the shaft on which the wheel is set to turn back. A properly applied spring i9 keeps the armature 107 normally separated from the core or pole piece of the magnet 104. This armature 107 is provided with a switch arm il0 for manipulating or actuating the springs. 105 and 106 of circuit openings and closings.



   Since the construction and arrangement of these springs and the operation of this switch arm are identical to the construction and mode of operation of the circuit breaker or the switch assigned to the magnet 31, no details will be given. more detailed description for the apparatus of the magnet 104.



  It can be seen in figure 3 that the switch actuation machine, consisting of the automatic call switch shaft S and the trunk line automatic selector shaft I, is mounted on a suitable support. and combined with relay 25, which controls a switching point in the circuit of the rotary magnet, as well as with the so-called vertical and rotary relays which control the contact circuits of the wiper 35, only a few of these relays being shown for convenience of representation. Fig. 16 gives a detailed and enlarged representation of the construction of the rotary relay 16 with the aim of clearly showing the arrangement of the inner and outer coils, with the normally closed contacts controlled by this remake.

   It goes without saying that this asshole

  <Desc / Clms Page number 43>

 tion can be used for all vertical and rotary relays.



   The construction, arrangement and mode of operation of the preliminary connector are as follows: Ten automatic switches of the kind shown in Figures 2 and 13 and each called a preliminary connector can be assigned to each group of one hundred subscribers or of eighty-one subscribers, as shown in the drawing, each subscriber of any particular group thus being provided with a means of choosing automatically, among the ten preliminary connectors assigned to his group , a device which is not occupied, provided that of course all the ten preliminary connectors are not occupied at this moment, a possibility which is however not probable even at very busy hours of the day.

   As shown in Figure 13, a preliminary connector is virtually identical to an ordinary connector, at least in terms of mechanical construction and operation; it is only necessary to use in a switch of this kind, the "vertical" and "rotary" magnets.
144a and 145 and the ordinary release relay and release magnet k and kl. The switch shaft k2 is provided with the previously described shaft rubbers 153, 154 and 155, all isolated from each other and from the shaft.

   In the lower row of fixed contacts k3, the vertical and rotary line contacts are arranged in pairs in the well known manner, each pair consisting for example of an upper contact connected by the normal conductor 157 to the line conductor d. subscriber 1, and a lower contact connected by the normal conductor 158 to the subscriber line conductor 2; it is understood that this particular pair of contacts is, as has been shown, the first pair of the fifth stage of the fixed contacts and is in multiple with a pair of contacts being in a corresponding row of each of the nine other connectors prelimi -

  <Desc / Clms Page number 44>

 naires.

   In this way, each pair of contacts of this row k3 is connected to the normal conductors of a subscriber line and is in multiple with nine other pairs of contacts in the corresponding stages of the nine other preliminary connectors. The upper row k4 of fixed contacts, on the contrary, contains individual contacts, that is to say that each stage is constituted by ten individual contacts, each of which is connected to a subscriber bridge interrupt relay.



   For example, the first contact of the fifth stage of this row k4 is connected by the normal conductor 156 to the bridge interrupt relay 159, in the manner previously described; it is easily understood that this contact connected to the normal conductor 156 is in multiple with nine other fixed contacts in the fixed contacts deprived of the nine other preliminary connectors.



   This shaft also has k5 vertical ratchet teeth and k6 rotating ratchet teeth. The vertical magnet 144a is provided with an armature k7 intended to be pivotally mounted in k8 and maintained in its normally withdrawn position, by a spring k9. At its end, the arm of this frame is provided with a pawl K10 which is pivotally fixed to the arm kll and is subjected to the tension of a spring k12. When the armature is attracted, the pawl K10 is forced back into engagement with the ratchet teeth k5 by any suitable guide means, and the shaft is thus lifted one advance at a time. Normally, the timing pawls k13 and k14 are out of engagement with the vertical and rotating ratchet teeth, but are released and allowed to engage these teeth as soon as the vertical magnet 144a is energized.

   The release magnet kl is provided with a frame kl5 having a horizontal arm provided at its end with an opening kl6 which normally engages on the projection carried by the rear end of the setting pawl kl8; it will be noted that the latter is established so as to pivot in kl9 and is subjected to the action of a tension spring

  <Desc / Clms Page number 45>

 k20. With this arrangement, the arm k21 of the release magnet frame is lifted by the arm k22 when the vertical magnet is energized and it will be noted that the short L-shaped arm k22 is 'engages below the arm k21. It is the spring k23, applied to the release magnet frame, which keeps the two timing pawls normally out of engagement with their respective ratchet teeth.

   While the switch mechanism is in use for connections, the end of the arm k21 rests on the upper end of the protrusion k17 so that the timing pawls engage the ratchet teeth, but as soon as the release magnet kl is energized, the opening kl6 engages on the wing K17 and when the release magnet is de-energized the spring k23 brings the armature back and, in doing so, it attracts the timing pawls out of engagement with the ratchet teeth. A support pawl k24 for engagement below each circular vertical ratchet tooth supports the shaft as it rotates and normally engages a longitudinal slot k25 extending vertically in the vertical ratchet teeth.

   As a result, the shaft can only be lowered or returned to its normal position after being rotated to a position where the support pawl k24 engages the groove slot k25. Rotation of the shaft after it has been jerked vertically to the desired level is effected by the rotating magnet 145 and through the armature k26 and the pawl .k27. It can be seen that this pawl k27 is pivotally mounted at k28 on the arm k29 of this frame and is subjected to the tension of a spring k30. The frame k26 is held by a spring k31 in its normally withdrawn position.

   With this arrangement, the pawl k27 is forced back into engagement with the ratchet teeth

  <Desc / Clms Page number 46>

 k6 when the magnet 145 is energized, this pawl being brought into engagement and out of engagement with the teeth by means of suitable guides, in the well known manner. At its upper end, this shaft is provided with the usual coil spring device k32 to return it to its normal position after it has been released by the release magnet. The normal upward arm k33 normally meets the spring 124 which normally maintains the latter out of engagement with the contact 125.

   These contacts are however closed as soon as the switch begins to operate, which places the earth on the conductor 121 leading to the private fixed contacts encountered by the private scrubber 101, so as to prevent seizure in service by any subscriber. of a preliminary comector which is already in use by another subscriber, Normally the normal post arm k33 is held against the normal post k34 by the tension of the spiral spring, this post acting as a stop to limit the rotation of the the tree back. The release relay k controls a switching point in the release magnet circuit k1 and is provided with normally open contacts k35 and k36, the latter being grounded at k37.

   One terminal of this release relay is earthed at k38 while the other terminal is provided with a conductor k39 leading to a first selector or else with the arrangement shown, to the connector switch; in such a case, the conductor k39 constitutes a release junction conductor between switches.



  It goes without saying that a suitable frame is provided to support the magnets of the preliminary connector and to hold the various operating parts in position to fulfill their various functions. The private slider 155 is obviously grounded in k40 while the battery 11 is grounded in K41. Figure 14 shows an ordinary connector,

  <Desc / Clms Page number 47>

 that is, a connector switch having a mechanism and circuits of a well known nature. It should be understood that any suitable number of these connector switches, for example ten, can be assigned to each group of subscribers.

   In such a case and for each group of subscribers, there will be ten connectors each of which may have the ordinary well-known construction and also ten preliminary connectors each of which includes a jerky advancement mechanism of the usual or well-known nature but which, in some respects differs as previously described from the ordinary connector, the difference in one direction being caused by the use of a switch of this general well-known nature for the purpose of establishing a connection directly with the calling subscriber line and not with the called subscriber line, as has heretofore been the only function, to the knowledge of the present inventors, of the type of switch usually referred to as a connector.

   With this arrangement, each subscriber line will terminate in the fixed contacts of ten preliminary connectors - these contacts being connected in multiple from one switch to another - and also terminate in the fixed contacts of ten regular connectors or other suitable connectors, the corresponding contacts of these connectors also being connected in multiple from one switch to another, in the manner explained previously.

   The arrangement therefore comprises for example ten series of contacts for each subscriber line, intended to be used exclusively for calls arriving on the line, at the same time as ten series of contacts for each subscriber line, intended to be used. used exclusively for outgoing calls, all such contacts being stationary; In this way it is not necessary that each subscriber line be normally connected to the wipers or brushes or other movable contacts of any other automatic switch.

  <Desc / Clms Page number 48>

 
 EMI48.1
 



  As explained previously, if the desk is comparatively small, it may only have the prelimingar connectors and the motors. If, on the contrary, the desk is of considerable importance, the first selector, selector seoonds or even the third Well-known selector switches may be included in the office as one of the means of establishing communication between the preliminary connectors and the regular connectors or other suitable connectors. All such automatic switches, except the preliminary connectors, are intended to receive number pulses, that is to say electrical pulses which represent the digits of a called number,

   as opposed to current pulses used to operate other switches or to perform other functions, before reoperation, by selectors or connectors, of the current assigned to them or of the current of peculiar nature) as previously indicated, any suitable arrangement can be employed to produce those current pulses or passes capable of first operating the preliminary switches and making the preliminary connections. before activating the selectors and the connectors or other similar switches. As has been shown, the connector M of FIG.

   14 comprises a commutator shaft m which can turn and move vertically and is provided with a private m1 wiper, a m2 vertical wiper and a m3 rotary wiper, it is understood that these three wipers are fitted with fawn to move with the tree and are isolated from the tree and from each other. At its upper end, this shaft is fitted with the usual device with a spiral spring m4 to return it to the normal position when it is released.

   In its normal position the normal post arm m5 of this shaft is held by this spiral spring device against the normal post arm m6. This arm, in its normal position, keeps the switch spring m7 out of engagement with point

  <Desc / Clms Page number 49>

 .of contact m8, these two oontaots oonstituent the oommutateur to close the circuit of the busy signal, as will appear more fully in the following.

   The shaft is also fitted with m9 vertical roohet teeth and m10 rotating roohet teeth Below the drum or the mIO roohet wheel is the usual m11 cam The m12 and mI3 setting pawls are intended respectively to engage with the rotating teeth and with the vertical teeth * but are normally out of engagement with the latter, as shown in fig. 14.



  These setting pawls are of a rigid part with the pivoting member mI4 which is intended to be mounted by a pivot in mI5 and which is subjected to the action of a spring mI6 normally tending to put the oliquets in engagement with their teeth. de roohet res- peoiives. This member m14 is provided with a projection m17 and an arm mI8, the latter projecting downwards and the other upwards. This projection m17 normally engages in an opening m19 of the end of 'an m20 swivel arm which is subjected to the tension of a spring m21 and rotates in m22. When the vertical magnet m23 is pulled out, it attracts its armature m24 which lifts the armature arm m25 against the tension of the spring m26 of fapon to force the arm m27 to lift the latch m20 out of engagement with the projection m17 .

   In this way, the first pulse thrown into the vertical magnet not only serves to re-engage the m28 pawl into engagement with the vertical ratchet teeth, but also to release the setting oliquets. This m28 oliquet pivots in m29 on the end of the arm m25 and it is subjected to the tension of a spring m30. A m3I support oliquet normally engages in an m32 oanal extending vertically through the vertioal roohet teeth, and it is intended to support the shaft, as it rotates, coming in oon- tact with the lower side of any tooth with which it happens to be engaged.

   Consequently, this shaft cannot be lowered to its normal position until it has returned by rotation to a position in the-

  <Desc / Clms Page number 50>

 whichever the m3I oliquet can engage in the oanal or the groove m32, The frame m24 is intended to pivot in m33 and any well-known guide devices can be used to direct the m28 oliquet when it is engages and disengages with teeth m9. The rotating magnet m34 is provided with an m35 armature which is intended to pivot in m36. This frame is provided with an m37 arm at the end of which is mounted an m38 swivel ratchet.

   This pawl is established so as to be directed by suitable guide devices, to engage and disengage with the teeth mIO when the magnet m34 is alternately energized and de-energized., The oliquet being subjected to tension. a spring m39, The private magnet m40 is provided with an m4I armature which is intended to pivot in m42 and which is purr- seen from an arm m43, This arm is provided, from the top and / bottom: of flat springs m44 and m45 fitted with roohet teeth m46 and m47 respectively, these teeth being directed towards each other. An m48 spring holds the m4I armature normally removed while an m49 spring holds the m35 armature normally removed.



   The m43 arm is fitted with an arm. of the m50 switch which protrudes laterally and which carries an m5I insulating piece at its end. This isolation is interposed between the switch spells m52 and m53 which are isolated from each other.



  Switch springs m52 and m53 are normally in unison with each other. The spring m55 is normally out of engagement with the spring m53 and these springs are not closed on top of each other until the private magnet is energized and when this magnet is energized the springs m52 and m5I are separated.



  The side switch lever m56 is intended to pivot in m57 and it is subjected to the tension of a spring m59 which tends in particular to make the side switch go from its normal position, that is to say from the position in which it is normally held or immobilized by the innermost lower tooth m47 carried by the arm of the private magnet reinforcement, For this purpose, the side switch is provided with a finger m58

  <Desc / Clms Page number 51>

 which is normally in engagement with the innermost tooth m47 and which is provided with a stop eye mI2I.

   The side switch is also limited in its movement by an m60 stop,
The other end of the side switch arm is provided with a side projection m6I which is pivotally connected to a bar m62 which is suitably connected at its end to the lower end of the aforementioned mI8 arm. In addition, the side switch is provided with a vertical slider m63, a side switch rotary slider m64, a private slider m65 and a magnet switching slider m66) it will be understood that these Trotters are fitted to be able to pass simultaneously from the first to the second position and from the second to the third position as shown in fiugs 14.



   For this purpose, the magnet switching wiper is provided with three contacts m67, m68 and m69, the private wiper with three oon .. tacts m70, m71 and m72, the vertical wiper with three contacts m73, m74 and m75 and the three-contact rotary wiper m76, m77 and m78 The m79 release magnet is fitted with an m80 armature intended to be pivotally mounted in m81. This armature is subjected to the tension of a spring m82 which normally tends to maintain the armature in its withdrawn position. This frame is preferably provided with an arm m83 intended to come into engagement, with a view to actuating it, with the pivoting member mI4 carrying the balancing pawls.

   When this magnet is excited, the setting oliquets are obviously disengaged from their respective roohet teeth and the switch shaft is returned to its normal position under the influence of the spring m4. In the arrangement shown, the vertical relay and the rotary relay m84 and M85 are minis of m86 and m87 armatures intended to energize the m90s. normally separate or open contact spells m88, M89, / mI and m92, the latter being earthed in m93.



   In fig. 14 the solid lines indicate the oir ouit of conversations, that is to say the parallel conducting paths for the voice currents, we see that these two paths

  <Desc / Clms Page number 52>

 conductors contain the capacitors m94 and m95. As is customary in a well-known connector switch of this type, the rear release relays m96 and m97 are fitted with m98 and m99 armatures intended to actuate the normally open or separate springs mIO0 and m101. , the latter being earthed at m103, The mI04 bell relay is fitted with an m105 armature intended to actuate the switch springs m106, m107, m108, 109, mIIO and mIII.

   The springs mI06 and mI07 are normally in request with each other) the springs mI09 and mIIO are normally engaged with each other, but the res out mIO8 is normally out of engagement with the spring mI07 and the spring m111 is normally out of engagement with spring m110 so that ring generator mII2 is normally detached from "vertical" and "rotary" line conductors xII3 and mII4. As can be seen, the private fixed contacts mII5 are intended to be touched by the private wiper m1, while the fixed vertical and rotary contacts mII6 and m117 are intended to be touched by the vertical and rotary wipers m2 and m3.

   In the private fixed contact group, the contacts are arranged in ten horizontal rows or floors of ten individual oon- tacts each while in the other group of fixed contacts there are ten horizontal rows or floors of ten ohaoun pairs. , each pair being formed of a vertical line contact and a rotating line contact. Each contact of the private group is connected to the bridge interrupt relay of a subscriber line, for example by means of the normal private conductor m118 while the vertical and rotary line contacts of the other group are connected to the subscriber line conductor for example by means of normal line conductors mII9 and m120.

   In this way, it can be seen that each subscriber line is connected to a pair of line contacts in each of the ten connectors assigned to the group. The different pairs of contacts assigned to a certain subscriber line being connected together. in multiple from one switch to another) in a way

  <Desc / Clms Page number 53>

 analogously, each subscriber bridge interrupt relay is connected to ten private fixed contacts, in the ten different connectors. It can be seen in fig. 15, that the normal conductors 1a and 2a are intended to extend to the fixed vertical and rotary contacts of the ten pairs of these oontaots situated in the ten different connectors assigned to this subscriber group.

   It can also be seen that the normal conductors ib and 2b of the called subscriber line are intended to extend up to the ten pairs of vertical and rotating oontaots in the row of fixed oontaots of the ten different connectors assigned to this subscriber group. . The normal private conductor I56a is intended to extend up to ten different private fixed contacts in the ten different conductors. The normal conductor m118a is intended to extend up to ten different private fixed contacts in the ten different preliminary connectors belonging to the group of which the called subscriber is part,
In the first selector N (fig. 17) there are no normal conductors leading to connectors.

   Also in this selector the bridge interrupt relay is omitted and the line relays are connected directly to the battery conductor. Private normal conductors such as the private normal inverter of the selector patent mentioned above are not necessary for the purposes of the selector switch N and have therefore been omitted The vertical magnet nl and the rotating magnet n2 as well as the release magnet n3 function in the well known manner and the private magnet n4 obviously controls the side switch wipers n5, n6, n7 and n8, this private magnet also controlling the circuit of 1 (vertical magnet nl in the usual way by means of the springs n9 and n10 but not the releasing magnet, since the releasing magnet spring is omitted.

   The vertical movement of the switch shaft and therefore of the wipers nll, nI2, nI3 is controlled by the vertical magnet and the rotary movement by the rotating magnet, the circuit of the rotating magnet being provided with springs

  <Desc / Clms Page number 54>

 usual switch n15. The operating magnets of the switch are obviously controlled by the subscriber through the "vertical" and "rotary" line relays nI6 and nI7 in the well known manner.

   These relays have under their control the usual springs n18, NI9, and n20 and in addition the junction line release springs n2I and n22 by means of which the switch can be released when the side switch wipers are in position. first or second position. The back release release n23 produces the release of switch N after the side switch is moved to the third position,
The selector switch E is of the general type of selector switches indicated in the American selector patent number 8I532I, the selector 1 is provided with the usual shaft (not shown) which carries the line wipers e3 and e4 and the contactor private e5.

   This switch shaft is actuated by "vertical" and "rotary" magnets e6 and e7 which are in turn controlled by the "vertical" and "rotary" line relays e8 and e9. The side switch comprising the switch wipers side eI0, e11, e12 and eI3 is under the control of the private magnet eI4. The release magnet e2 provides a means of returning the switch to the normal position after it has been actuated. As the selector E is of the trunk line release type, the release magnet e2 is controlled by the reverse release relay el., After the side switch has passed to the third position.



   The third selector 0 is also a modified form of the selector switch shown in the aforesaid selector patent and it comprises the vertical magnet o1, the rotating magnet o2, the release magnet o3 and the private magnet 04, this the latter naturally controlling the side switch trotters 05, 06, 07, and 08 This private magnet also controls the vertical magnet circuit ol in the usual way by means of the springs o9 and oIO, but not of the magnet of liberation, because the

  <Desc / Clms Page number 55>

 The release magnet springs are removed.The vertical movement of the switch shaft) not therefore represent line rubbers oll and o12 and the private trotter c13 is controlled by the vertical magnet,

   and the rotary movement by the rotary magnet, the rotary magnet being provided with the usual switch springs o14. The operating magnets of the switch are obviously controlled by the subscriber through the interna- tional "vertical and" rotary "line relays. OI5 eto16 in the well-known manner, In addition to the usual springs, these relays control the oI7 and oI8 connecting line release springs by means of which the switch can be released when the side switch is in the first or second position.



  By means of the reverse release relay oI9, the release of switch 0 is produced after the side switch has passed to the third position.



   Referring to FIG. 12 which shows the equipment of the calling subscriber, it can be seen that the ringtone a25 is normally bridged between the conductors of the subscriber line, through contacts a26 and a27, the body of orchet-switch a and the conductors a4 and a28 but this bridge is obviously cut as soon as the receiver is removed from the oroohet. The arrangement is preferably such that a1 establishes and cuts off the oontao with a2 before aI4 and a15 are closed on each other and after a27 has turned off contact with a26; although this slide and this mode of operation give the desired results, it goes without saying that any other suitable control arrangement may be employed, in accordance with the mode of operation of the control machine. switch and with the other switches.

   When the oroohet switch moves upwards, the protrusion a2I engages between the springs a22 and a23 so that these three springs are not together, When, on the other hand, the receiver is replaced on the hook, the protrusion a2I meets the exterior of the contact at 22 which forms against each other the three sources in the Deorite manner.

  <Desc / Clms Page number 56>

 



   The oontaots a6 and a7 are normally separated and are only engaged with each other by the lifting of the arm a29 from the switch of the hook. The other arm a30 of the hook switch is intended to close against each other the normally separated contacts aI4 and a15 included in the circuit of the conductor 1 and the pushbutton arm a12. When the switch hook is lowered by replacing the receiver, the protrusion a1 engages the outer faoe of the contact a2 but does not establish an electrical connection therewith owing to the existence of the insulation a34 .



   It will be seen from the foregoing that with this improved arrangement only one switch control machine is needed for each group of subscribers; that only the line relays as well as the bridge interrupt relays are individually specific to the different lines) that the automatic switches used are less numerous than the total number of subscribers and that for each group of one hundred subscribers, for example only ten preliminary connectors and ten ordinary connectors or other suitable connectors are needed to obtain an efficient and completely satisfactory operation of the system,

   and that an efficient telephone service between subscribers is thus ensured by means of equipment comprising a substantial and substantial reduction in the number of switches required to enable any particular subscriber to establish communication with any one. which other subscriber, practically at all times, except when the called subscriber line is effectively in use or busy for other purposes.



  It can be seen that the switch actuation machine shown sohematically in FIG. 1, comprises two mechanisms, one of which is a digital pulse transmitter for transmitting the electrical pulses corresponding to the number of the calling subscriber line and the other is a trunk line selector provided with a means of distinguishing between free and occupied connection lines, combined with automatic means.

  <Desc / Clms Page number 57>

 ques thanks to which this selector maintains all the subscriber lines or free telephone lines in selective relation with the first free connection line which comes immediately after the last in service.

   With this arrangement, the digital pulse transmitter is normally in electrical connection with the first free switch K, trunk line connection, which comes immediately after the last switch put into service. It is evidently understood that this last switch in service may have been brought back to normal, but regardless of whether it has been returned to normal or if it is still in service, the normal connection coming from. of the digital pulse transmitter is made with the first trunk line connection switch which is free and which comes immediately after the last one taken into service.

   Consequently, the subscriber lines or the telephone lines - that is to say all the free lines - are normally maintained in a selective relation with the first free trunk line which comes immediately after the last employed. . With a similar arrangement and a similar mode of operation, each calling subscriber reaches a chosen trunk line and at the same time chooses the next free trunk line for the next call.

   In this way, each calling subscriber does not make a selection for himself but, on the contrary, makes a selection for the subscriber who makes the next call, or else, of course, if the same subscriber calls twice, he will then obtain, during the second call, the connection with the trunk line that he had automatically chosen when he made his first call. It can be seen that in an office of minimal importance such as the one represented, each subscriber number has only two digits, namely the number of tens and the number of units of this number.

   If, however, the office should be enlarged to make it necessary or desirable to use numbers containing four digits, it is evident that the digital pulse transmitter of & has ma-

  <Desc / Clms Page number 58>

 switch actuation would only call the last two digits of each calling subscriber number. In other words, with the office thus enlarged, each subscriber would have a four-digit number and the last two digits of each number would constitute the group number, in a way, of each subscriber.

   For example, if in an office thus enlarged to meet the needs of a greater number of subscribers a certain subscriber number is 5566, that number will be the office number of that particular subscriber, and both last digits (66) will constitute the number of the subscriber group, that is to say they will constitute its number in the partial group in which its set is included. In this connection, it will be understood that all this can result from the simple arrangement of the system in groups of one hundred subscribers for each group, which makes it possible to give each subscriber an office number composed of any suitable number of subscribers. digits, and a group number consisting of only two digits which are the last two digits of the general or office number.

   The switch actuation machine will have as many sets of interrupt relays - such as relays 16, 165, 166, etc., - as there are digits in the group numbers of the a- subscribers to which this switching machine is assigned. Each series of interrupt relays has a corresponding series of contacts on the digital pulse transmitter, and each series of interrupt relays is intended to deactivate one or more contacts of the series of contacts which it has. is assigned, according to the number of electric pulses required to represent each digit of the calling subscriber number.

   In other words .. the digital pulse transmitter transmits as many distinct or separate groups of pulses as there are digits in the calling subscriber number and the number of pulses in each group depends. the number of contacts which are not released from the different series of contacts by the automatic action of the interrupt relays

  <Desc / Clms Page number 59>

 tion. Each calling subscriber therefore not only employs its individual line relay but also uses one relay in each of the different series of interrupt relays, in substance as shown and described. With the arrangement shown, all the junction line selection and connection equipment is normally at rest.



  The switch actuator is normally at rest and has no movement until a subscriber makes a call.



   It can be seen that each trunk line connector or pre-selector K represents a group of subscribers and that each stage in the fixed line contacts in this apparatus represents a sub-group. To lift the wipers up to the floor of any sub-group there are as many local circuits as there are floors or sub-groups (see figure 1), so that these rubbers can be lifted to any floor.



    CLAIMS:
1) - A switching device normally at rest, including several switches each provided with a jerky advancement mechanism and a switch actuation device, common to all these switches, as well as a means to- automatic connection of the device electrically to the jerky advancement mechanism and of disconnecting from it, this device being normally connected to one of the switches, so that this device can be used to operate any of the switches. switches without interfering with its subsequent use to operate other tandia switches that the actuated switch remains in service.

** ATTENTION ** end of DESC field can contain start of CLMS **.


    

Claims (1)

2) - A switching device normally at rest, oom- comprising several switches each provided with a means of EMI59.1 launch with electromagnetic actuation and an arc maohine <Desc / Clms Page number 60> operation of switches, common to all these switches, this machine containing an automatic means of opening and closing an electrical connection with the means of advancing the various switches, one at a time, so that the machine can be used to make operate any switch without interfering with its subsequent use to operate other switches while the actuated switch remains in service. 3) - A switching device comprising telephone lines., Switches each provided with an electromagnetically controlled actuation means, and an electromagnetically actuated electrical impulse transmission means, to operate these switches, individual line relays to start the operation of this pulse transmission means, and an automatic means of electrically connecting this pulse transmission means by means of actuation of any switch and for the deoonneotate it, so that the pulse transmitting means may be employed to operate any switch without interfering with its subsequent use for the operation of other switches while the actuated switch remains in service. 4) - A communication device normally at rest, comprising an automatic switch with two movements representing an electromagnetic control means of aotation, and an automatic means of transmission of electrical impulses, electromagnetically actuated and put into operation. connection and appropriately controlled to operate the switch, this means of transmission being capable of calling the number of the calling subscriber and the automatic switch being intended to operate accordingly by finding the line of the subscriber called. peeling. 5) - An automatic telephone system, comprising a subscriber line calling an automatic switching device. <Desc / Clms Page number 61> that with jerky advancement and with two movements, a machine for actuating switches, an individual means occupying a central position, under the control of the subscriber, for causing this machine to automatically call the number of the subscriber. calling subscriber and thereby forcing the switch to close a connection to the calling subscriber line. 6) - An automatic telephone system, including a calling subscriber line and an automatic means .. having movements in the vertical direction and in the rotary direction, located at the central station but under the control of the subscriber, to automatically initiate the call from his own extension and connect to it here before calling the other subscriber. 7) - An automatic telephone system comprising a calling subscriber line, a means having movements in the vertical direction and in the rotary direction under the control of the subscriber to call any other subscriber, and a means automatic transmission of pulses located at the central station but under the control of the calling subscriber, to automatically call his own station before calling the number of another subscriber. 8) - An automatic telephone system comprising several subscriber lines, switches in a smaller number than the total number of these subscribers, trunk lines leaving from these switches and a switch operator, normally at rest common to all these switches and placed under the control of the subscribers, so that any of the subscribers can have one of the switches connect one of these trunk lines to its line before calling the number of any other subscriber. 9) - An automatic telephone system comprising a group of subscriber lines, a certain number of automatic two-movement switches, common to all these lines but in a lesser number than these darnières, trunk lines for conversatio, hence of these switches, one <Desc / Clms Page number 62> normally idle means, under the control of subscribers, for operating these switches so that a calling subscriber can cause one of the switches to connect a trunk line to its own line before calling the number of another subscriber. 10) - An automatic telephone system comprising a group of subscriber lines, several switches common to these lines but less in number than the latter, trunk lines leaving from these switches, other switches in which these trunk lines terminate and a machine normally at rest for the actuation of switches, common to all these switches mentioned in the first place, as well as individual relay means under the control of the subscribers to force this machine to actuate these switches. switches mentioned first so that the calling subscriber can connect his line to one of the trunk lines before activating one of the other switches in accordance with the first digit of the called number. II) - An automatic telephone system comprising a group of subscriber lines, switches assigned and provided with all these lines but in lesser number than the latter, other switches connected in an appropriate manner to the switches mentioned in the first place, with means controlled by hand, normally at rest, by which any subscriber can make one of the switches mentioned in the first place connect his line to one of the other switches, before the subscriber activates the latter in accordance with the first digit of the called number. 12) - An automatic telephone system comprising a group of subscriber telephone lines, junction line connection switches, with jerky advance, assigned to all these lines and common to all the lines, but in less number than the latter, other jerky-feed switches and a hand-controlled means, normally at the <Desc / Clms Page number 63> idle, by which any calling subscriber of the group can connect his line to one of these other switches before requiring one of these other switches to start its operation in accordance with the first digit of the number called. 13) - An automatic telephone system comprising a group line / subscriber telephone line, individual line relays, several switches with saooaded advance and two movements assigned and common to all these lines but in lesser number than the latter, each line terminating in multiple fixed contacts of all switches, these contacts being intended for use when making outgoing calls only from these lines, and a means of understanding these contacts in conversation circuits. 14) - An automatic telephone system comprising a group of subscriber telephone lines, individual line relays, two-way switches, common to all these lines but in lesser number than the latter, and a means placed under the control of the relays to operate the switches, each switch having multiple fixed oontaots connected to all the subscriber lines, these oon- tacts being arranged in rows and intended to transmit conversation currents in both directions, but intended to be used only for making outgoing calls from these lines. 15) - An automatic telephone system comprising subscriber telephone lines, individual line relays, automatic switches common to all these lines but in lesser number than the latter, each line being connected to multiple fixed contacts of all the commutateus, contaots which are intended to be used to make only outgoing calls coming from these lines, another group of automatic switches common to all these lines, for a subscriber calling another subscriber, of the group, but in less number than the lines, lines 1 also being connected to contacts <Desc / Clms Page number 64> fixed in multiple in all the switches mentioned last, but these latter contacts are intended to serve to make only incoming calls directed to these lines. 16) - The combination of a subscriber line, of a jerky advancing switching device, of a switch-actuating machine, normally at rest, electrically connected in order to operate this device jerk-advancing switching device and a means placed under the control of the subscriber to cause this machine to operate the switching device. 17) - An automatic telephone system comprising subscriber telephone lines, automatic two-movement switches, common to all these lines but in fewer numbers than the latter, and automatic means normally at rest, placed under the control of subscribers , to automatically choose and operate one of the switches which is free, and a means of extending a communication in accordance with the number of the line called. 18) - An automatic telephone system comprising subscriber telephone lines, individual line relays, subscriber switching devices guessed to transmit electrical impulses in the lines according to the nature and number of digits of a called number any, and automatic switches common to all the lines but less in number than the latter, each subscriber device being able to establish a sufficient current flow to cause the operation of one of these switches before the transmission of current intended to be used exclusively for calling the number of the called subscriber. 19) - An automatic telephone system comprising subscriber telephone lines, a line relay normally bridged in each line to the central station, a bridge interrupt relay for each line, switches common to all <Desc / Clms Page number 65> these lines but fewer in number than the latter, a machine comprising a certain number of normally open oirouits, controlled by the line relays, an automatic means of ensuring the connection of a free switch with this machine when a subscriber calls., a means of putting this machine into operation each time a subscriber tries to put himself in communication with another subscriber, the circuits controlled by each subscriber line relay being of such nature and being combined with operating means such as the machine, once put into operation always transmits to the free switch a call corresponding to the number of the calling subscriber , as well as a means by which each free switch produces, by closing a connection to a calling subscriber line, the energization of the bridge interrupt relay belonging to this line. 20) - An automatic telephone system comprising subscriber telephone lines, individual line relays, a group of automatic switches common to all these lines but less in number than the latter, each switch comprising a pair of fixed oontaots for each subscriber line, the corresponding contacts of different switches being connected together in multiple, another series of automatic switches common to all the lines for a subscriber calling another of the group, but in a smaller number than the lines, These last mentioned switches also each being provided with a pair of fixed oontaots for each line, corresponding contacts of the various last mentioned switches being connected together in multiple, and two pairs of normal line conductors for each line, one pair connected to all contacts in multiple belonging to that line in a series of switches and the other pair of normal line conductors connected to all contacts in multiple appar - holding this line in the other series of switches. SI.) - A telephone system comprising telephone lines <Desc / Clms Page number 66> subscriber pikes, individual line relays, trunk lines for conversation, common to all subscriber lines, for one subscriber calling another in the group, but in fewer numbers than these lines, automatic switches. - ques also common to all subscriber lines but in a smaller number than these lines and each intended to directly establish a communication to any calling subscriber line, starting from one of the lines junction. 22) - An automatic telephone system comprising subscriber telephone lines, preliminary connectors common to all these lines but in lesser number than the latter, a line relay normally in bridge on each line, a line relay. interruption of the bridge for each line, connectors common to these lines but in a smaller number than the latter, and a means placed under the control of the subscribers to produce the operation of the preliminary connectors and also of the connectors, each preliminary motor being intended, when establishing a connection with a calling subscriber line, to energize the bridge interrupt relay of this line and also to establish a guard potential at all the connectors in connection with this line. 23) - In a telephone system, a calling line, an automatic switch associated with this line, a commanded means of this line to operate this switch in order to force it to call the number of the calling line, this means containing a series of contacts, a movable element for this switch, associated with these contacts, this actuating means being normally at rest and the element always being movable in the same direction. 24) - In a telephone system, a calling line, an automatic switch associated with this line., A means controlled by this line to operate the switch in order to oblige it to call the number of the calling line, this means comprising a series of contacts, a movable element for the <Desc / Clms Page number 67> mutator associated with these contacts, these actuating means all being normally at rest and the element always being movable in the same direction, the means comprising a certain number of circuits controlled by relays. 25) - In a telephone system, a calling line, an automatic switch associated with this line, a controlled means of this line to operate the switch and containing a series of contacts, a wiper at two ends for this switch, this slider having its opposite ends intended to come into engagement alternately with these contacts, these actuating means all being normally at rest and the element always being movable in the same direction. 26) - In a telephone system, a calling line, an automatic switch associated with this line, a controlled means of this line to operate the switch) and containing a series of oontaots, a mobile element for the switch associated with these contacts, these actuating means all being normally at rest and comprising a shaft, a ratchet wheel on this shaft, an oliquet to control the ratchet wheel, an electromagnet to remove the pawl and a spring to advance it. oi ,, the element mentioned being always mobile in the same direction. 27) - An automatic telephone system comprising a series of contacts, a suitably actuated wiper intended to circulate in circles on these contacts, a pair of conducting paths containing several normally closed switching points, conductors connecting these contacts to the conducting paths. ters, each of the switching points being located between the two points or two adjacent contacts are connected to the conductive path containing the switching point two series of relays to control these two series of switching points, a means placed under the control of the calling subscriber to operate a relay in each series in accordance with the number of the calling subscriber, 1 and a forward switching device <Desc / Clms Page number 68> saccada cement provided with rubbers or movable switching arms connected to these oonduoteurs paths, as well as a certain number of jerky advancing switches connected to the jerky advancement switching device intended to be actuated by the impulses transmitted by the rotation of the first mentioned wiper. 28) - An automatic telephone system comprising vertical line relays, rotary line relays, subscriber lines, a line relay for each line, circuits for these vertical and rotary relays, controlled by these line., each line relay controlling the circuit of a vertical relay and a rotary relay., according to the number of the subscriber to which this line relay is assigned, of the circuits controlled by these vertical and rotary relays, and a automatic means of transmitting pulses through the last mentioned circuits, the number of pulses transmitted each time depending on which of these latter circuits have been opened, if any. 'open, by operating a particular calling subscriber line relay. 29) - A telephone system comprising a group of telephone lines, switches in fewer numbers than these lines, provided with rows of fixed oontaots containing the terminal terminals in multiples of these lines, a junction line leaving from each switch and a maohine for the operation of these switches, intended to be used only by calling subscribers for preliminary and automatic operation of these switches with a view to closing a connection between the calling telephone lines and the free trunk lines, provided with '' an automatic means of skipping occupied switches and stopping in connection for operation with the first free switch, this machine also being seen as a means of transmitting electric pulses to call the number of the calling subscriber, with a view to forcing the chosen switch to connect its trunk line to the line. telephone call you, the switches each having a <Desc / Clms Page number 69> series of swiveling rubbers connected to the junction line which is assigned to it and intended to cooperate with its bounded row to connect oelle-oi to any of the telephone lines. 30) - A telephone system comprising lines for joining the telephone lines intended to be connected to these trunk lines, a switching means for performing this operation, a trunk line selection mechanism, a meoa - electrical impulse transmission mechanism associated with this selec- tion mechanism and an automatic means under the control of the subscriber to ensure that the impulses seen by the switching means and coming from the transmission mechanism operate always to the number of the telephone line calling, the switching means being provided with a means of forcing the selector mechanism to choose the next free trunk line each time the previously chosen trunk line is connected to a calling telephone line, so that each subscriber caller always obtains the free connection line chosen automatically by the preceding call. 31) - A telephone system comprising a group of trunk lines, a trunk line selection and connection device, a means located at a telephone station to control this device and telephone lines connecting this device to the stations, The apparatus being provided with means of distinguishing between occupied and free junction lines, intended to skip the occupied junction lines and to stop on the first free junction line, and being also provided with automatic means by which the connection with a chosen trunk line involves the selection of the next free trunk line, in such a way each calling subscriber always obtains the free trunk line which comes immediately after the last commissioning, and chooses a trunk line for the next subscriber. 32) - In a telephone system, the combination of li- <Desc / Clms Page number 70> . trunk lines, means of automatically calling the number of a calling subscriber and means by which this calling subscriber automatically chooses a trunk line for the next call. 33) - A telephone system provided with trunk lines and an automatic trunk selection and connection device, device by means of which each calling subscriber chooses a trunk line for the next call. 34) - A telephone system comprising a group of telephone lines, junction lines in fewer numbers than these telephone lines, the latter all normally being in selective relation with the free junction line which comes immediately after the last connection. in service, and an automatic means by which each calling line takes the waiting trunk and chooses another for the next call. 35) - A telephone system comprising a number calling device provided with a certain number of contacts, a slider intended to move on these contacts, and interrupt relays each intended to put one or more out of service. of these contacts according to the number to call. 36) - A telephone system comprising an automatic number call mechanism, provided with a certain number of interrupt relay groups, one group for each digit of the number to be called, and a series of contacts for each group, each relay being intended to take out of service one or more contacts of the series assigned to the group to which the relay belongs. 37) - In a telephone system, the combination of telephone lines8 of a series of switches intended to be used only to establish a connection directly with a calling line, before making connections in accordance with the called number, d 'an automatic means of keeping all lines free and a selective relation with the first com <Desc / Clms Page number 71> free switch which comes immediately after the last switch in service, an automatic means of operating any switch chosen, in accordance with the number of the calling subscriber, and of individual line relays. ordering this automatic means, so that each calling subscriber chooses a switch for the next call. 38) - In a telephone system, the combination of an automatic means of calling the number of the calling subscriber, an appropriate number of telephone lines, a number of trunk connections common to these lines, and of an automatic means for keeping all the lines free in selective relation with the first free trunk connection which comes immediately after the last one in service, so that each calling subscriber obtains a chosen trunk connection from before . 39) - In a telephone system, the combination of trunk lines, an automatic mechanism by which each calling subscriber chooses a trunk line for the next call, and an automatic means by which each subscriber calling simply closes the connection with the trunk line which is chosen in advance or which is waiting. 40) - In a telephone system, a means of automatically calling the number of the calling line each time a subscriber begins to make a call, this means located at the central office comprising a means of transmitting separate groups and distinct from electrical pulses for each digit and in corre- spondence with each digit of the number, a means actuated by these pulses, intended to choose the calling line and to establish the connection with oelle-oi, and line relays individual subscribers to control this pulse transmission means. 41) - In a telephone system, the combination of individual line relays, one line for each relay, these lines being arranged in groups, by an automatic means located <Desc / Clms Page number 72> pu central station for calling the group number of any calling line, this means being controlled by the relays, and an appropriate means having movement in two directions. to establish connections in accordance with the number thus called. 42) - In a telephone system, the combination of a number of switches, trunk lines extending from these switches, telephone lines, an automatic trunk line selection mechanism, capable of distinguishing between free and busy trunk lines, by an automatic means by which this selection mechanism keeps all free telephone lines in selective relation with the first free trunk line which comes immediately after the last in service, and an emotion mechanism EMI72.1 nment of switches, common to all switches, intended for use by calling subscribers to operate these switches. 43) - In a telephone system, the combination of a number of switches, trunk lines extending from this telephone line switches, an automatic trunk line selection mechanism capable of distinguishing between lines free and busy trunk line, an automatic means by which this selection mechanism maintains all free telephone lines in selective relation with the first free trunk line which comes immediately after the last in service. Switch actuation, common to all switches, for use by calling subscribers to operate those switches, and individual line relays for these telephone lines. 44) - In a telephone system, the combination of a certain number of switches, of trunk lines leaving from these switches, of telephone lines, of an automatic mechanism for selecting a trunk line which can be distinguished. <Desc / Clms Page number 73> war between free and occupied junction lines, by an automatic means by which this selection mechanism maintains all free telephone lines in selective relation with the first free junction line which comes immediately after the last in service, d 'a switch actuation mechanism common to all of these switches and intended for use by calling subscribers to operate these switches, each of these switches being provided with a terminal terminal, in multiple, of each of the telephone lines. 45) - In a telephone system, the combination of a number of switches, trunk lines from these switches, telephone lines, an automatic trunk line selection mechanism capable of distinguishing between free and busy trunk lines, by an automatic means by which this selection mechanism maintains all free telephone lines in selective relation with the first free trunk line which comes immediately after the last in service, by a mechanism of 'switch actuation, common to all switches, intended for use by calling subscribers to operate these switches, each of the switches having a shaft that can rotate and movable vertically, sliders on this shaft. and rows of terminal line terminals for these wipers. 46) - In a telephone system, the combination of a switching machine provided with rows of terminal line terminals, lines extending from these terminals, a junction line for the conversation, departing from this maohine, d 'a junction line for the switching ending in this machime, and a means of transmitting digital pulses through this junction line to force this machine to connect the junction line to these line terminals. 47) - In a telephone system the combination of a switching machine provided with rows of line terminals, lines terminating at these terminals, a connecting line <Desc / Clms Page number 74> starting from this machine, from a junction line ending at this machine with a means of transmitting digital impulses through this last junction line to force the machine to connect the first junction line to one of the line terminals, and individual line relays for lines to the machine. 48) - In a telephone system, the combination or trunk lines, an automatic digital pulse transmitter, an automatic trunk line selection mechanism, provided with a means of distinguishing between lines of jonotion occupied and free and an automatic means of maintaining this transmitter in connection with the first free junction line which comes immediately after the last in service. 49) - In a telephone system, an automatic transmitter of electric pulses, provided with a slider intended to make a complete revolution each time any subscriber makes a call, a means by which calling subscribers start the call. operation of this transmitter, an automatic means of varying the number of pulses for different calling subscribers, and a means operating under the effect of these pulses to find the calling subscribers. 50) - In a telephone system, an automatic transmitter of electrical impulses, provided with a slider intended to make a full turn or a maximum movement each time any subscriber makes a call, a means by which the subscribers callers initiate transmitter operation, an automatic means of varying the number of pulses for different calling subscribers., and a pulsed means of finding calling subscribers. 51) - In a telephone system, an automatic transmitter of electrical pulses having the same range of motion or operation whenever any subscriber- @ <Desc / Clms Page number 75> that makes a call, a means by which calling subscribers start the operation of this transmitter., an automatic means of varying the number of pulses, for different calling subscribers, and a means operating under the effect of these pulses to find calling subscribers. 52) - In a telephone system, an automatic transmitter of electric impulses, provided with a series of contacts, a wiper to engage with these oontaots, a means of moving the wiper on all oontaots oha - that once any subscriber makes a call, a means of automatically disabling one or more of these contacts to vary the number of pulses by the various subscribers, a means by which calling subscribers make start transmitter operation, and pulse-driven means to find calling subscribers. 53) - In a telephone system, an automatic transmitter of electrical impulses, provided with a series of contacts, a wiper to engage these contacts, a series of relays to move the wiper on all the contacts cha - that once any subscriber makes a call, a means of automatically disabling one or more of the contacts will vary the number of pulses for the different subscribers, a means by which subscribers callers outline the operation of the transmitter, and a pulse-driven means of finding calling subscribers. 54) - In an automatic telephone system, the combination with the subscriber lines divided into groups, of a certain number of pre-dialers and first selectors for each group of lines, each pre-dialer comprising oon- line taots connected to the subscriber lines of the group, a movable contact device and a means of producing the movement of this movable contact device to make it establish contact with the line contacts, each first selector oom - <Desc / Clms Page number 76> taking line contacts, a mobile contact device, in electrical communication with the mobile contact device of one of the preselecters, and a means of moving this mobile contact towards its line oontaots, of trunk lines connected in multiple to the line contacts of the first selector switches, of an auxiliary switch common to several preselectors, coupled for a call to one of the preselectors and functioning at the same time as the latter, and a means connected to the trunk lines and arranged so as to establish the final connection through the chosen trunk line, to the desired subscriber, 55) - In an automatic telephone system, the combination, with the subscriber lines divided into groups, of a certain number of pre-dialers for each group of lines, each comprising line contacts connected in multiple to the telephone lines. respective subscribers of the group, a mobile contact device and a means of moving this contact device to force it to establish contact with the line contacts, a number of first selectors for each group of lines, each first selector comprising line contacts, junction lines divided into series and multiple connected to the line contacts of the first selectors, a movable contact device for each first selector, the movable contact device of each first selector being in electrical communication with the movable contact device of one of the preselectors, of an auxiliary switch common to several preselectors, coupled for a call to one of the preselectors and operating at the same time as this, of a means of moving the mobile contact device, of each first selector to engage it with the oontaots of an unoccupied junction line of the desired series, and a means connected to the oontaots of the first selectors in a manner and arranged to establish the final connections to the deactivated subscriber. <Desc / Clms Page number 77> 56) - In a telephone system, the combination with the subscriber lines divided into groups, and for each group of lines a number of pairs of switches, each pair comprising a preselector and a first selectors, each preselector and first selector comprising line contacts, a movable contact device cooperating with the individual line switches and a means of moving the movable switch device the movable switch device of each pre-selector being in electrical communication with the movable contact device of its first selector combined with an auxiliary om- mutator common to a certain number of preselecters, coupled with a view to calling one of the preselectors and operating at the same time as the latter, the line contacts of the preselectors being connected to the respective subscriber lines of the group of trunk lines divided in series and connected in multiple to the line contacts of the first selectors, and to means established so as to make the final connection to the desired subscriber, 57) - In an automatic telephone system, the combination, with the subscriber lines divided into groups, of a certain number of pairs of switches for each group of lines, each pair comprising a preselector and a first corresponding selector each preselector and each first selector including line contacts, a movable contact device and a means of moving the movable contact device until it engages with the single line oontaots, the movable contact device of each pre-motor being in electrical communication with that of its first conjugate selector, the line contacts preselectors being connected to the corresponding subscriber lines, of junction lines connected to the line contacts of the first selectors, of an auxiliary switch common to several preselectors, ao - coupled with a view to a call to one of the preselectors and operating at the same time as the latter, a call relay for <Desc / Clms Page number 78> subscriber phaque, arranged so as to activate the auxiliary switch and the means of moving the mobile contact device of a free pre-selector, and a means actuated at the call station to operate the mobile contact device of the corresponding first selector. 58) - In an automatic telephone system, the combination with the subscriber lines divided into groups, of a certain number of preselector and first selectors for each group of lines, arranged in pairs., Each preselector and each first selector comprising line contacts, a movable contact device and a means of moving its movable contact device, the movable contact device of each preselector being in electrical communication with that of its first corresponding selector, the subscriber lines of the group being connected to the line contacts of the preselectors, of junction lines connected to the line contacts of the first selector switches, of an auxiliary switch common to several preselectors. coupled with a view to calling one of the preselectors and operating at the same time as the latter, with a call relay for each subscriber line, arranged so as to activate this auxiliary switch and a free preselector during a call, means placed at subscriber stations to automatically actuate the corresponding call relay when the receiver is off-hook, and means located at subscriber stations to operate and control the first selector and to establish the final connection through the chosen trunk line. 59) - In an automatic telephone system, the combination with the subscriber lines divided into groups, of a certain number of pairs of switches for each group of lines, each pair comprising a preselector and a first corresponding selector, each preselector and each first selector comprising line contacts., a movable contact device and a means for moving the control device. <Desc / Clms Page number 79> mobile touch to bring it into engagement with the single line contacts, the mobile contact device of each preselector being in electrical communication with that of its first conjugate selector, the line contacts of the preselector being connected to the subscriber lines corresponding junction lines connected to the line contacts of the first selectors, an auxiliary switch common to several preselectors, coupled for a call to one of the preselecters and operating at the same time as the latter, a call relay for each subscriber, arranged so as to put in action this auxiliary switch and the means of moving the mobile contact device of a free preselector, and so as to stop this preselector when its mobile contact device arrives at the contacts of the line. calling subscriber, and means located at the calling station for controlling the mobile switch device of the first corresponding selector. 60) - In an automatic telephone system, the combination with subscriber lines divided into groups, of a certain number of pairs of switches for each line group, each pair comprising a preselector and a first corresponding selector, each preselector and each first selector comprising line contacts, a movable contact device and means for bringing the movable contact device into engagement with the individual line contacts, the movable contact device of each preselector being in electrical communication with that of its first combined selector, the line contacts of the preselectors being connected to the corresponding subscriber lines, of trunk lines connected to the line contacts of the first selectors, of an auxiliary switch common to a certain number of preselectors, coupled, for a call, to one of the preselectors and operating at the same time as the latter, of a call relay for each subscriber, a common call relay arranged so as to be actuated by any subscriber call relay and to activate the auxiliary switch and the means of movement. <Desc / Clms Page number 80> because the mobile contact device of a free preselector, and means actuated at the calling station to operate the mobile contact device of the first corresponding selector. 61) - In an automatic telephone system, the combination with the subscriber lines divided into groups, of a certain number of switches for each group of lines, these switches being arranged in pairs, each pair comprising a pre-dialer and a first selector, each preselector and its first selector comprising line contacts, a movable contact device set up to engage these line contacts, the movable contact device of each preselector being in communication. electrical connection with that of the first corresponding selector, the line contacts of each preselector being connected to the corresponding subscriber lines, of junction lines connected to the line contacts of the first selector, of a means of moving the control device. mobile tact, an auxiliary switch common to a number of preselectors, coupled for a call to one of the preselecters and operating at the same time as the latter, a call relay for each subscriber, arranged so as to activate the means of moving the mobile contact device of a pre-dialer, an interrupt relay for each subscriber, arranged so as to disable the call relay of the calling subscriber when the pre-motor is placed on the calling line, with a means located at the calling station to control the mobile contact device of the first selector, and with a means operated via the chosen junction line, to establish the final connection to the desired subscriber. 62) - In an automatic telephone system, the combination, with the subscriber lines divided into groups, of a certain number of switches for each group of lines, these switches being arranged in pairs, each pair comprising a preselector and a corresponding first selector, <Desc / Clms Page number 81> each preselector and its first selector comprising line contacts, a mobile contact device established so as to engage these line contacts, the mobile contact device of each preselector being in electrical communication with that of the first corresponding selector, the line contacts of each pre-dialer being connected to the corresponding subscriber lines, trunk lines connected to the line contacts of the first selectors of an auxiliary switch common to a certain number of preselectors, coupled with a view to calling one of the preselectors and operating at the same time as the latter, a means of moving these mobile contact devices of a call relay for each subscriber, arranged so as to activate the auxiliary switch and the means of moving the mobile contact device of a preselector of an interrupt relay for each subscriber arranged in such a way as to put the called subscriber's call relay out of action, by a means aotated at the calling station to control the mobile contact device of the first selector, and a means operated through the chosen trunk line, to make the final connection to the desired subscriber. 63) - In an automatic telephone system, the combination with subscriber lines divided into groups of a certain number of switches for each group of lines, these switches being arranged in pairs, each pair including a preselector and a first selector, each preselector and its first selector comprising line contacts, a movable contact device of each preseleotor being in electrical communication with that of the corresponding first selector, the line contacts of each preselector being connected to the corresponding subscriber lines; of junction lines connected to the line oontaots of the first selectors) of means of moving these mobile contact devices, from an auxiliary switch common to a certain name. <Desc / Clms Page number 82> bre of preselectors, coupled for a call to one of these preselecters and operating at the same time as the latter, and of a pair of relays for each subscriber line, each pair comprising a relay of call and an interrupt relay, the call relay being arranged to activate the auxiliary switch and a free pre-selector, during a call, and the interrupt relay being arranged to switch off. activates its call relay when the corresponding subscriber line is busy. 64) - In an automatic telephone system, the combination with subscriber lines divided into groups, of a certain number of preselectors and first selectors for each group of lines, each device comprising line contacts, a movable contact device arranged so as to engage with these line contacts, and a means of moving the movable contact device, the movable contact device of each pre-motor being in electrical communication with that of one of the first selectors, the contacts of the preselectors being connected to the corresponding subscriber lines, of trunk lines connected in multiple to the first selectors, of an auxiliary switch common to a certain number of preselectors, aoooupled for a call to one of these preselectors and arranged so as to control its mobile contact device to bring the latter, when necessary, into contact with the contacts of a calling line, d a means actuated at the calling station to move the mobile contact device from the first selector and to make the final connection through the chosen trunk line to the desired subscriber. 65) - In an automatic telephone system, the combination with subscriber lines divided into groups, of a number of preselectors and first selectors for each group of lines, each device comprising line contacts, a movable contact device established so <Desc / Clms Page number 83> % on to come into engagement with its line oontaots, and a means of moving the movable contact device, the movable contact device of each elector near being in electrical communication with that of one of the first selectors, the contacts of the preselectors being connected to the corresponding subscriber lines, of trunk lines connected in multiple to the first selectors) an auxiliary switch common to a certain number of preselectors, coupled with a view to calling one of these preselectors and arranged so as to bring its mobile contact device to the contacts of the line of the 'calling subscriber, of a preselector finder, controlled by the preselecters and arranged so as to couple a free preselector, with a view to the next call, to the auxiliary switch, by a means actuated at the calling station for moving the mobile contact device from the first selector, and from a means actuated via the connecting lines to make the final connection between the subscriber lines. 66) - In an automatic telephone system, the combination, with the subscriber lines divided into groups and sub-groups, and for each group of lines, local circuits in a number equal to the number of sub-groups. groups) for each group of lines, a certain number of preselecters, each comprising subscriber line contacts arranged in series corresponding to the sub-groups, a mobile contact device and a means to move the mobile contact device towards the series of contacts and along them, with a call relay in each subscriber line, arranged so as to activate a free preselector, when a call, and to modify the state of the local circuit of the sub-group to which its line belongs) for each group of lines a common auxiliary switch coupled to a free pre-selector ready for a call and operating in synchronism with the pre-selector and arranged so as to stop the mobile contact device from the pre-selector to the contact series of the sub-group of the maid <Desc / Clms Page number 84> calling party and to force this mobile contact device to come on the contaots of the line of the calling subscriber. 67) - In an automatic telephone system, the combination with subscriber lines divided into groups, a number of preselectors and selectors arranged in pairs and several connectors for each line group, each selector and oonotor preselector comprising line contacts, a movable contact device and a means of bringing its movable contact device into engagement with its line contacts the movable contact device of each pre-selector being in electrical communication with the movable contact of its corresponding selector of an auxiliary switch common to several preselectors, coupled for a call with one of the preselecters and operating at the same time as the latter, the subscriber lines of the group being connected in multiple as incoming lines to the line contacts of the preselectors and as outgoing lines to the line contacts of the co-operators, of a system of trunk lines divided into series and connected in multiple to the contacts respective lines of the selector and to the mobile contact device of a corresponding connector of a means for automatically operating the preselecters to place the mobile contact device of a free preselector on a calling line, and of a means located at the subscriber stations to start up a free preselector and to activate and control its corresponding selector and a connector of the line group of the desired subscriber. 68) - In an automatic telephone system, the handset Ion, with the subscriber lines divided into groups, of a number of preselectors and first selectors arranged in pairs, of a number of contactors, and of a number of intermediate selectors for each group of lines, each preselector, first selector, intermediate selector and connector comprising line contacts, a <Desc / Clms Page number 85> contact device, movable and a means of bringing its movable contact device into engagement with its line oontaots., the movable contact device of each preselector being in electrical communication with the movable contact device of its corresponding first selector , an auxiliary switch common to several preselectors, coupled for a call with one of the preselectors and operating at the same time as the latter, of trunk line system, one system for each set of selector switches, the trunk lines of each system being divided into series and each trunk line being connected in multiple to the respective contacts of its corresponding selector switches and to the mobile contact device of a selector or a subsequent connector, the subscriber lines of the group being connected in multiple as incoming lines to the line contacts of the preselectors and as outgoing lines to the line contacts of the connectors, a means of automatically activating the preselectors to put the mobile switch on. a free preselector on a calling line, and means located at the subscriber stations for starting up a free preselector and for activating and controlling its first selector, the chosen intermediate selectors and an operator of the group of lines of the desired subscriber. automatic 69) - In a telephone system. the combination with the subscriber lines divided into groups, of a number of double switches, each consisting of a preselector and a selector, and of a number of single switches, each consisting of a connector, for each group of lines, each selector and connector preselector comprising line contacts, a movable contact device and a means of bringing its movable contact device into engagement with its line contacts, the movable contact device of each preselector being in electrical communication with the mobile contact of its corresponding selector, of an auxiliary switch common to several of the preselectors. mated for a <Desc / Clms Page number 86> call to one of the preselectors and operating simultaneously with the latter the subscriber lines of the groups being connected in multiple as incoming lines to the line contacts of the preselectors and as outgoing lines to the line contacts of the motors, and of a trunk lines divided into series and connected in multiple ways to the respective row contacts of the selectors and aU ') movable contact device of a corresponding connector the double switches being arranged to establish connections of a calling subscriber line to an unoccupied trunk line of the desired subscriber's line group, each of the simple switches being arranged to establish connections from its leading trunk line to a desired subscriber line. 70) - In an automatic telephone system, the combination, with subscriber lines divided into groups, of a number of double switches, each double switch consisting of a preselector and a first selector., And d a number of simple switches, consisting in part of connectors and in part. in intermediate selectors, each preselector first of intermediate selector and connector comprising line contacts, a movable contact device and a means of bringing its movable contact device into engagement with its line contacts , the mobile contact device of each preselector being in electrical communication with the movable contact device and its corresponding first selector, of an auxiliary switch common to several preselectors, coupled with a view to calling one of the preselectors and running at the same time as the latter, of connecting line systems, one system for each set of selector switches, the junction lines of each system being divided into series and each junction line being connected in multiple to the respective contacts of its corresponding selectors and to the movable contact device of a selector or of a subsequent connector, the lines subscribers <Desc / Clms Page number 87> of the group being connected in multiple or as incoming lines to the line contacts of the preselectors and as outgoing lines to the line contacts of the connectors, the double switches being arranged to establish a connection from a calling subscriber line to a first line of unswitched connection of the desired series, the simple switches being arranged so as to continue the connection from trunk line to trunk line and finally to the line of the desired subscriber 71) - In an automatic telephone system, the combination, with the subscriber lines divided into groups, of a number of preselectors and first selectors for each group of lines, each device comprising line contacts, a device of movable contact established so as to come into engagement with its line contacts and a means of moving the movable contact device, the movable contact device of each preselector being in electrical communication with that of one of the first selectors, the preselector oontaots being connected to the corresponding subscriber lines, of junction lines connected in multiple to the first selector switches, of an auxiliary switch common to several preselectors, coupled for a call to one of the preselectors and arranged so as to bring its mobile contact device to the contacts of the line of the calling subscriber, of a switching device controlled by the preselectors and arranged so as to bring the following free preselector into the control sphere of this auxiliary switch, with aotated means at the calling station to move the mobile contact device to the first selector, and to means operated through the trunk lines to make the final connection between the subscriber lines. 72) - In a telephone system, a calling device, a number of magnets, a series circuit passing through- <Desc / Clms Page number 88> contacts controlled by these magnets, and means by which two of the magnets can be actuated to thereby control the pulses omitted by the calling device, in substitution as above described. 73) - In a telephone system, there are fewer subscriber lines and searcher switches than these subscriber lines, these searcher switches being normally at rest, a means of starting and operating one of these searcher switches which is unoccupied to force it to establish a connection with the line of the calling subscriber under the effect of the removal of the repeater by the calling subscriber. 74) - In a telephone system, a means of establishing a connection between a calling line and a called line, this means comprising a seeker switch, a selector switch and a connector switch, all of these switches having movement within two intersecting shots. 75) - An automatic telephone system comprising a calling subscriber line, a means having two kinds of movement under the control of the subscriber for calling any other subscriber, and an automatic means of pulse transmission. sions, located at the central station but placed under the control of the calling subscriber, to automatically call one or more digits of the number of his own station, including the final digit of this number, before calling the number from another subscriber. 76) - In a telephone system, there are fewer subscriber lines and searcher switches than these subscriber lines, a means of operating one of these searcher switches which is free to force it to establish a connection with the calling subscriber line when this calling subscriber detaches his receivers and a trunk line release circuit for this seeker switch. 77) - In a telephone system, subscriber lines. * Relays specific to these subscriber lines, trunk lines in fewer numbers than subscriber lines, switches <Desc / Clms Page number 89> researchers for these junction lines, a means of exciting one of these relays via a calling subscriber line, a means that functions under the effect of the excitation of this relay, and independently of any digital operation at the calling station, to force a free seeker switch to establish a connection with the subscriber's line, and a trunk line release circuit for this seeker switch. 78) - In a telephone office system, a certain number of line circuits, trunk circuits to link these, and switches, primary selectors for these trunk circuits, each of which switches to groups of line terminals, as well as a means operating under the effect of a current in a calling line, intended to direct this primary selector switch first towards the group of contacts in which the line is represented and then towards the individual line contact in the group. 79) - In an office telephone system, a number of circuits to be chosen, a selector switch with terminals for these circuits, fixed in a predetermined order, and a test means for driving the switch , by jerks, under the effect of a change of current in a given oirouit, to choose this circuit during a number of advances less than the number represented by the total number of given line terminals , in the order they are arranged. 80) - In a telephone system, a line, a relay for this line, an automatic switch with progressive movement to find this line, a means of automatically making this switch function under the effect of the operation of the relay line, and an interrupt relay to make this line relay inactive when the line is found. 81) - In a telephone system, a line, a relay for this line, an automatic switch with progressive movement to find this line, a means of automatically operating this switch under the effect of the function. <Desc / Clms Page number 90> line relay, and an interrupt relay to deactivate the line relay. when the line is found, these line and interrupt relays are individually specific to the line. 82) - In a telephone system, a line, a switch to find this line, a relay specific to the line to control the switch, an interrupt relay to control this first relay, a telephone for the line, this telephone being provided with a pulse emitting means, a means by which a non-digital operation of emitting pulses to the telephone causes the switch to establish a connection with the line and energizes the interrupt relay to deactivate the line relay, a digital switch to extend the connection coming from the line after the finder switch stops on the line, this digital switch operating under the effect of digital operations on the telephone. 83) - In a telephone office system comprising a number of telephone lines, a number of trunk lines, an automatic switch mechanism associated with each trunk circuit to connect its trunk circuit to a desired line , a main switch having a fixed contact corresponding to each junction circuit, a conjugate movable contact and a means of forcing this movable contact to move out of socket with the fixed contact of any junction circuit. when it is chosen and connected to a telephone, and to move in order to engage with the fixed contact of a free jonotion circuit. 84) - In a control apparatus .. a line, a device with impulses associated with oelle-oi, devices for controlling this device with impulses, a means aotated during the operation of any of these devices actuation to force the impulse device to make a certain number of electrical contacts, and a means controlled by the actuator which is in operation, <Desc / Clms Page number 91> to determine the number of these electrical oontaots which intervene to vary the electrical state of the line. 85) - In a control device, a series of actuating devices, a series of pulse contacts normally electrically connected, a wiper, a means operating when one of these devices is actuated to force the wiper to pass over the contacts of this series, and an actuated means also pays for this aotération to interrupt the electrical connection to some of these contacts. 86) - In a control device, a series of actuating devices, a series of normally electrically connected pulse contacts corresponding to these devices, a conduotrioe blade, a trotter, a means operating during actuation any of these devices to force the wiper to successively connect these contacts to the conductive blade and a means also activated by this actuation, to interrupt the electrical connection between certain contacts of the series. 87) - A telephone system containing telephone lines, selective switches to choose these lines, a mobile switch, a contact for each selec- tive switch associated with the latter, a positioning mechanism, or electrically, to force the mobile switch to go to rest normally, engaged with the contact of a free selec- tive switch and connections through which any line can influence the mobile switch to activate this switch free. 88) - A telephone system containing telephone circuits with multiple contacts, a certain number of selectors to choose these contacts, a distributor switch to activate these selector switches, an automatically controlled mechanism to put in position this switch so that it rests normally while maintaining established a normal connection going from the switch to a free selector, <Desc / Clms Page number 92> and means controllable through any of these telephone circuits to force the distributor switch to change the electrical state of this connection to activate the free selector for selection. - on the circuit. 89) - A telephone office system comprising a number of electrically controlled devices, a switch for controlling these devices, a control means for this switch., At rest only when a current path s 'extends through the switch contacts to one of these devices which is free, and means controlled by the switch for causing current to flow in that path. 90) - A telephone system comprising a certain number of subscriber lines, selective devices controlled electrically to connect these lines as calling lines, a main switch for these switches, a means of actuation for this switch at rest only when a current path extends through this switch to one of the selective devices which is free, and a means operating under the effect of the start of a call in one of the lines to operate the switch so as to cause a current to pass through this path. 91) - A telephone system containing telephone lines, multiple terminals for these lines in the office, selectors to choose serial terminals under the effect of calls initiated by means of these lines, line relays provided for each line .. a distributor switch to activate the selectors, from the connection connections of this distributor switch to the line relays, so that any line relay can, when activated , influence the distributor, a pair of contacts for each selector in this switch, a pair of movable contact members for the switch, intended to engage with the pair of oontaots, magnets for the selectors, <Desc / Clms Page number 93> intended to operate to cause the circulation of their respective selectors, a circuit of this distributor switch, controlled by the line relays of these lines, to remove the magnet from a free selector, a circuit containing one of the contact members, the contact of a free selector in pri- ve with this one and the magnet of this selector, an electromagnet of this distributor switch controlling the movement of it, and a circuit for this magnet, sensitive to the occupied state or. free of the selectors, this circuit enclosing the other contact member of the switch and the selector contact engaged with it * 92) - A telephone system containing telephone lines, multiple terminals for these lines in the office, these selectors for choosing de / lignas terminals under the effect of calls sent by them, line relays provided one for each line, a distributor switch to activate the selectors, branch connections going from this distributor switch to the line relays and thanks to which any line relay can, when activated. , influence this distributor, a pair of oontaots for each selector at this switch, a pair of moving parts for the switch, intended to engage with the pairs of contacts, magnets for the selectors, intended to act to cause the movement of their respective selectors, a circuit of this distributor switch controlled by the line relays of these lines to excite the magnet d 'a free selector,. this circuit containing one of the contact members, the oon- tact of a free selector in engagement with oelui-oi and the magnet of this selector, an electromagnet of this distributor switch controlling the movement of the latter, a circuit for this magnet sensitive to the free or occupied state of the selectors, this circuit closing the other switch contact member and the selector contact engaged therewith, and a contact off standard of the selector also included in this circuit. <Desc / Clms Page number 94> . 93) - A telephone system containing telephone lines arranged in groups, these groups being divided into sub-groups, terminals in multiples belonging to these lines, arranged and divided in an analogous manner, line relays., for each line, a sub-group relay common to the line relays of a sub-group and which can be actuated by oeux-oi, a common actuating conductor with connections to the sub-group relays group of a group of lines so that any relay of a sub-group of a group of lines can control the electrical state of this conductor, selective switches to choose the terminals in multiple of calling lines, and a means of interchangeably connecting free switches to this actuation conductor. 94) - A telephone office system, comprising a number of subscriber telephone lines divided into groups, a number of trunk circuits for the link, a number of electrically controlled switches to complete connections between n ' any calling lines and any called lines, these switches containing line selectors assigned in groups to groups of lines, the total number of such switches being less than the total number of telephone lines, regardless the number of these in the office, and a means of establishing between pairs of lines all in the same group as many conversation circuits existing simultaneously as there are line selectors for the group. 95) - A telephone office system, comprising a number of subscriber telephone lines, a number of trunk circuits for their connection, a number of electrically controlled selectors to complete caller connections between any line / and any line called, the total number of these switches being less than the total number of telephone lines, regardless of <Desc / Clms Page number 95> number of these in the office, switch contacts for each of the selectors, intended to be crossed by the reversing currents when the selectors are included in connections, and a means by which switching a calling line for connection to a called line operates only those selectors whose contacts are included in the finally completed talk circuit. 96) - A telephone system containing telephone lines of trunk circuits including electrically controlled selective switches., At each end, the switches of the answer ends of these trunk circuits used to select calling lines, relays of line for these lines, a circuit for activating the switches at the response ends of the junction circuits, this circuit comprising normal activating connections, a means for activating this circuit when a switching relay Any line is actuated and a means disengaging that circuit, with respect to power-on connections established subsequently, until another line relay is actuated. 97) - A telephone system containing telephone lines, line selectors for choosing calling lines, provided in a number determined by the existing calls expected from these lines, connectors for connecting to the called line, provided in number based on the expected percentage of existing calls, one or more classes of intermediate group selection switches, the switches of each olasse being provided in a number determined in an analogous manner and the olasses being provided in number depending on the number of telephone lines, an electromagnetic switching mechanism for setting a switch of each class in order to establish a complete conversation circuit between a calling line and a line <Desc / Clms Page number 96> called and a means of operating the line selectors to connect each of them to a different line, 98) - A telephone system containing telephone lines, trunk circuits located in the office and having selective switches at both ends actuated electrically, the switches of the response ends of these junction circuits serving, when they are activated, to connect junction circuits to calling lines, an actuation conductor to initiate the movement of predetermined number of free switches among the last mentioned selective switches, and line relays for these lines as well as branch connections from this conductor to these relay so that any line can command the conductor to activate a switch. 99) - A telephone system containing telephone lines, trunk circuits located in the office, having at both ends electrically actuated selective switches, the switches located at the answer ends of these trunk circuits serving, when they are activated, to connect junction circuits to calling lines., a starting conductor to start the movement of a free switch only among these selector switches, line relays for these lines and branch connections running from this conductor to these relays and by means of which any line can control the conductor to set up a switch and a means of connecting the selective switches from the calling ends of these junction circuits to defined conductors. 100) - A telephone system containing telephone lines, connection circuits located in the office and comprising at both ends electrically actuated selector switches; the switches of the response ends of these connecting circuits serve., when they are activated, <Desc / Clms Page number 97> in connecting junction circuits to calling lines, an actuating conductor to start the movement of a free switch among these selective switches and associated for operation on all lines at the same time, an automatic switch at the end of this activation conductor, from the terminal terminals of these selective switches in the automatic switch, and a test means allowing the automatic switch to choose a terminal of a free selective switch. IOI) - A telephone system containing telephone lines, trunk circuits located in the office and having at both ends electrically actuated selective switches, the switches of the answer ends of these trunk circuits serving, when they are set in motion, to connect trunk circuits to calling lines, an actuation conductor to start the movement of a free switch among these selective switches, line relays for these lines and a connection of, branch going from this conductor to these relays and by means of which any line can control this conductor to activate a switch, an automatic switch at the end of the activation conductor, terminal terminals of these selective switches in the automatic switch and a test means enabling this automatic switch to choose a terminal terminal of a free selec- tive switch. 102) - A telephone system containing telephone lines, junction circuits located at the office and having at both ends selec- tive electrically powered switches; the switches of the response ends of these junction circuits serving to connect them to calling lines, an actuating conductor to start the movement of a free switch among the selective switches, a means of connecting the selective switches of the <Desc / Clms Page number 98> calling ends of these junction circuits to defined line inverters line relays for these lines and a branch connection which goes from this conductor to this relay and by means of which any line can control this conductor for activate a switch, an automatic switch at the end of the actuation conductor, terminal terminals of these selective switches in the automatic switch, and a test means enabling this automatic switch to be activated. choose a terminal terminal of a free selective switch, 103) - A telephone system containing a group of telephone lines, terminal terminals for these lines, located at the office, grouped together and arranged in sub-groups, junction aircrafts at the office and selective switches for these circuits in order to connect free trunk circuits to calling lines, a common communication circuit, to start the movement of a free selective switch, seated for operation on these lines at the same time, a means of switching normally at rest at the office and at the sets of these lines, available when calls are started, to operate the activation circuit, an electromagnetic switching mechanism located in the office, operating automatically under the action of this means to control the movement of a switch activated in order to choose the sub-group and then the terminal terminals of the calling line. 104) - A telephone system containing a group of telephone lines, terminal terminals for these located at the office, grouped together and arranged in sub-groups, trunk circuits at the office and selective switches for these circuits in view to connect free trunk circuits to calling lines, a common actuation circuit to start the movement of a free selective switch associated with the operation of these lines at the same time, a means of switching normally at rest at the office and at <Desc / Clms Page number 99> these lines, able, when calls begin, to operate this circuit of activating an electromagnetic switching mechanism located at the office, automatically functioning under the aotion of this means to control the movement of 'a switch started to choose the sub-group and then the terminal terminals of the calling line, and an automatic switch at the end of this activation circuit and used to determine the free switch . to start. 105) - A telephone system containing telephone lines, selective switches for selecting these lines as calling lines, trunk line selection switches coupled with these first-mentioned switches and serving to extend calling line circuits chosen, a main switch mechanism normally shared with these lines to choose a free selective switch, a way to start the movement of this meoanism, and oom mutators out of normal for these selector switches, serving when they are moved. to continue the movement of this mechanism to choose a selective switch having its switch out of normal not moved, or in the normal position. 106) - A telephone system containing telephone lines, selector switches to choose these lines as calling lines, trunk line selector switches, coupled with these first-mentioned switches and used to extend calling line circuits o chosen, a main switch mechanism normally common to these lines to choose a free selective switch, a means of starting the movement of that mechanism, and out of normal switches for these selector switches, controlling the amount of movement of the switch. this mechanism. 107) - A telephone system containing a group of telephone lines, a line relay for each of these lines a group relay common to these lines and intended to operate <Desc / Clms Page number 100> under the action of any one of these line relays, a number of automatic switches intended to establish a connection with these lines, a switch contact of this group relay with a view to an interchangeable association with these switches so that the operation of the group relay automatically activates a free switch, and selective switches connected to these automatic switches to operate under the effect of currents commanded at the stations. 108) - A telephone system containing a group of telephone lines, a line relay for each of these lines, a group relay common to these lines and intended to operate under the action of any one of the line relays. , a number of automatic switches intended to establish a connection with these lines. a switch contact of this group relay for interchangeable association with these switches, so that the operation of this group relay automatically activates a free switch ,, selective switches connected to these switches automatic to operate under the effect of currents commanded at the stations, jonotion circuits connected to these automatic switches to serve to extend circuits from calling lines to called lines. 109) - A telephone office system comprising subscriber telephone lines divided into groups, trunk circuits for their connection, line selectors assigned in groups to groups of lines, switches electrically controlled indicatively to cooperate with the line selectors in order to join a calling line and a called line for conversation by means of the connection circuits, a manual means of transmission of impulses to the stations, for the indicative control of the latter switches, and a means for establishing between pairs of lines all in the same group, as many conversation circuits existing simultaneously as there are line selectors for the group, <Desc / Clms Page number 101> 110) - A telephone office system comprising subscriber telephone lines, trunk circuits for their connection, line selectors, and electrically controlled switches indioatively to cooperate with these line selectors for the purpose of to unite these lines into polling circuits, a manual means of transmitting pulses to the posters to control these individually controlled switches, and a means by which the aid of establishing such a conversation activates only the switches whose oontaots are included in the finally completed conversation circuit. III) - A telephone office system including calling lines, line selectors; functioning to establish a connection each with a different calling line, called lines, connectors to establish a connection with called lines, trunk circuits for the link) ,. and intermediate switches of different olasses to unite these junction circuits and these lines into conversation circuits, each class of intermediate switches having a total number of switches not exceeding the total number of line selectors, for offices of any number of lines. 112) - A telephone office system including called lines, line selectors operating to establish a connection each with a different calling line, called lines, connectors to establish a connection with called lines, circuits of junction for the link, and intermediate switches of different classes to unite these junction circuits and these lines into oonversion circuits, each olass of intermediate switches having a total number of switches not exceeding the total number of connectors of the offices of any number of lines. 113) - A telephone system containing telephone lines, line selectors for choosing call lines - <Desc / Clms Page number 102> tes, connectors for establishing connections with lines called one or more classes of intermediate group selection switches, the classes being provided in number commensurate with the member of the telephone lines. an electromagnetic switching mechanism for setting a switch of each class to establish a complete conversation circuit between a calling line and a called line, and a means of operating the line selectors to connect them each to a different line. II4j- A telephone system comprising telephone lines, and an associated electrical switch mechanism comprising standby contacts arranged in a group, a contact cooperating therewith and movable in a primary direction towards the different groups and in a secondary direction towards the pending contacts in the groups, a means of starting this movable contact in a primary direction, and an automatic means, of causing the continuation of the primary movement towards a defined group and then the secondary movement up to a contact defined in this group, 115) - A telephone system comprising telephone conductors and an electrical switch mechanism associated therewith and comprising standby contacts forming terminal terminals of these conductors and arranged in groups, a contact cooperating with these and mobile in the primary direction towards the different groups and in the secondary direction towards the contacts waiting in the groups, a means of starting this mobile contact, and an automatic means of continuing its movement towards a defined group and then towards a contact defined in the group. 116) - A telephone system containing a group of telephone lines, a line relay for each of these lines in the office .. a group relay common to the lines of the group, a new subdivision of these groups into sub-groups, a relay of sub-group common to the lines of a crazy-group, a means of <Desc / Clms Page number 103> operate the line relay of a line initially by currents controlled at the station, and excitation circuits for these group and sub-group relays, controlled by this line relay. 117) - In combination with a certain number of telephone lines arranged in groups, a group relay associated with each group and activated by any of the lines of the corresponding group, a group selection mechanism, selectively controlled by these relay, a relay common to these groups, initial excitation circuits for these group relays controlled by the common relay, and an excitation circuit for this common relay, controlled during the operation of any of the relays of group. 118) - In combination with a certain number of telephone lines arranged in groups, a group relay for each group actuated by any of the lines of the corresponding group during a call, a selection means group placed under the control of these group relays, an excitation circuit comprising a connection for each of these group relays, and a relay located in the common part of this excitation circuit to prevent operation. of the other group relays when any of the group relays is activated. Office 119) - In a / telephone system, the combination of a telephone line of a line relay specific to this telephone line and normally connected as a bridge on it, of an interrupt relay to open this bridge, of a circuit for exiting this interrupt relay, of an automatic means of closing this circuit when the line calls, this means being controlled by the calling subscriber and of another circuit to energize the interrupt relay when the line is called. 120) - In a telephone system, a subscriber line, an automatic switch associated with the line, a means containing this switch to extend this line when it is <Desc / Clms Page number 104> calling line, an automatic switch-connector controlled by the subscriber having direct access to this line to establish a connection with this line as called line, a line relay specific to this line and normally bridged to it, a line relay Interrupt to open the line relay bridge, and circuitry to energize the interrupt relay whenever the line is called or called. I2I) - In a telephone system, a subscriber line an automatic switch associated with this line, a means containing this switch to extend this line when it is calling, a means to establish a connection with this line as called line , a line relay for this switch, specific to this line and normally mounted as a bridge on oelle-oi, an interrupt relay to open this bridge, and circuits to keep the excitation relay energized during the whole setting. online when the line is engaged as calling line or called line. 122) - In a telephone system, an automatic switch, a trunk line extending to this switch and enclosing conversation conductors permanently connected to the switch wipers, functional conductors EMI104.1 operation resulting in; ", to the actuating magnets of this switch, and a pulse machine located in the office, common to this switch and other similar switches, for transmitting pulses through the operating conductors. 123) - In a telephone system, a group of trunk circuits * intended to be used to connect calling and called lines, automatic switches, associated with a trunk switch, a common transmitter normally at rest located at the office, to transmit pulses to the switches, and means associated with this transmitter and controlled from a calling subscriber station to start the transmission and to determine the number of pulses to be transmitted. <Desc / Clms Page number 105> 124) - In a telephone system, a group of trunk lines intended to serve to connect the calling and called lines, a branch for each of these trunk lines a pulse transmitter device, located at the office and common with these branohings, a means of associating this device with any branch and of making the device operate to emit a certain number of series of pulses in the branch to which it is associated a means commanded by the subscriber and associated with this device to determine the number of pulses in each series, and an automatic switching mechanism, controlled by the pulses and associated with these connecting lines. 125) - In a telephone system, a group of lines, an oheroheur switch, a series of tens relays and a series of unit relays, a means controlled by the intermediary of a calling line to energize the relays corresponding, and a device controlled by the energized relays to send the appropriate series of pulses to the finder in order to place the latter in position on the calling line. 126) - In a signaling system, a pulse transmitter containing a series of contacts, a contact member intended to be rotated on these contacts, a means of transmitting an impulse when this contact member engages with each contact. contacta and a pulse spacer to prevent pulses from being transmitted when the contact member engages some of these contacts. 127) - In a signaling system, a pulse transmitter containing a series of normally closed contacts, an automatic means of opening some of these oontaots, and a means of transmitting a certain number of series of pulses , the number of pulses in each series depends on the particular oons that are open. 128) - In a signaling system, a means of transmitting a certain number of series of impulses, this means <Desc / Clms Page number 106> making a series of local circuits normally closed at one point and normally open at a second point, an impulse spacer for opening some of these normally closed points, and a contact member for successively closing the normally open points. 129) - In a telephone system, a subscriber line, an automatic switch associated with this line, a second line (you subscribe a means of establishing a connection from the first subscriber line to the second or from the second to the first, a line relay specific to the first subscriber line and bridged to it to control the automatic switch, and an interrupt relay to disconnect this xx line relay from the line when the first line is called, this interrupt relay also serving to disconnect this line relay from the line when this first line is called.