BE373355A - - Google Patents

Description

       

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  Fire alarm system.



   The present invention relates to signaling systems in general but more particularly to improvements to fire alarm systems, and the main object of the invention is, in general, to establish a system. in which fire alarm signals are received and recorded at a central location in a faster, more efficient and more secure manner than heretofore.

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   A feature of the invention resides in the use, in a fire alarm system, of means in which a signal from an actuated warning box is automatically transmitted to a district office and then automatically returned to a central supervisor's office where the signal is displayed on visible lighted panels and is then automatically transmitted back to the originating district office and all other district offices and displayed therein on similar lighted panels.



   Another feature of the invention relates to means by which visible exposure signals are indicated in duplicate for the purpose of checking the accuracy of the box number from which the signal was received.



   Other objects of the invention are to design a system using a minimum of apparatus in an efficient manner allowing all necessary operations to be carried out automatically. These objects and features and others still not especially indicated will emerge from the accompanying drawings which, together with the detailed description, constitute the preferred embodiment of the invention.



   The drawings comprising 11 boards show schematically, when they are placed end to end as indicated in FIG. 12, with their adjacent lines in extension, the invention by means of the usual circuit diagrams.



   Figure 1 shows a single FS-249 fire station connected to its associated RO relay equipment at the district office.



   Figure 2 shows an SS succession switch having access to the RG relay equipment of Figure 1 and also to all other fire stations. The SN transmitting switch transmits the number of the assigned fire station.



  In the upper ooin of gauohe there is shown a line of

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 TC1 jonotion extending to a central supervisory office.



   Figure 3 shows a re-switch R2, controlled by the transmitter SN of figure 2.



   Figure 4 includes a group of DS3 digit storage relays and their associated oontacts which oomman. dent a group of lamps placed in a lamp panel.



   Except for the FS-249 fire alarm station, Figures 1, 2, 3 and 4 include all the equipment associated with a single district office.



   Figure 5 shows different lamps and keys associated with the equipment at the central office or at the supervisor post, with a group of relays connecting the supervisor post by means of a TC-2 trunk line to the supervisor's office. district.



   Figure 6 shows a seeker switch F for grabbing the line extending from the district office. The lower part of the figure shows a transmitter switch T, individually specific to the district office, to transmit the number of the fire alarm boot which has been activated.



   Figure 7 shows the receiver switch R-1 which receives the number of the line with which the finder F of Figure 6 is associated.



   Figure 8 shows a series of DS-2 fire storage relays, connected to a lamp panel which displays the number of the activated warning boot.



   FIG. 9 shows the OS code transmitter switch for translating the code of the activated warning station, with a view to operating the punch recorder PR.



   Figure 10 shows the group of OR control relays and associated relays and also the key of the operator call device CD to manually set numbers received by means of telephone systems or alarms at

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 idle to control the digit storage relays of figure 8.



   Figure 11 shows schematically the general arrangement of the complete system as shown in detail in the other figures.



   Figure 12 shows a schematic of the method of assembling the different boards of the drawings.



   Figure 13 is a code card showing the order in which the number storage relays of Figure 8 and Figure 4 operate and display a number on the lamp panel.



   If we refer more particularly to Figure 11; this drawing schematically shows the principles of the invention. In the lower right-hand corner there is a central overseer station with branch lines associated with a number of district offices, two of which are indicated. Each district office, for example No. 1, has a large number of fire alarm boxes or stations connected to the office, all of which are in a particular district or area under the control of that office. Each fire station, for example PS-249 is connected to the office by a normally closed circuit.



  A pair of lamps are associated with each line at the district office. One lamp is used to indicate when an alarm is working and the other to indicate when there is a disturbance on the line, for example a broken line or a grounded line. Each district office is provided with an exhibition board and has a device in which the operation of a fire alarm box activates certain equipment in the office to start up a connection line. extending to the post of supervisor. The post of supervisor has a

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 number of keys and lamps. One of these series is shown linked to District Office No. 1 as well as a display panel similar to the one in the District Office.



   During system operation, when a fire alarm box, such as PS-249, is actuated, the associated alarm lamp is lit at district office No.1 and the equipment in the district office takes that line into service and extend it to the surveillance post; another lamp is then lit to indicate that the warning is from the particular district office. The supervisor's station equipment is then put into operation to automatically translate the boot number and have it appear in duplicate on a lamp panel, to give certainty that the correct number has been set.

   This number is then transmitted back to the district office where the call originated and is displayed there in duplicate on a similar lamp panel. The number is also sent by the equipment to all other district offices ending at the supervisor position, so they know there is a fire and know its situation. Note that the only manual action required is to simply open the fire alarm line extending from the fire box to the district office.



   Facilities have been provided whereby "idle" warnings can be received by means of a telephone line at the supervisor's station and be established there semi-manually on display panels of the supervisor. post and also forwarded to each of the district offices.



  Other facilities allow, at the fire alarm box, the connection with the telephone line extending through the warning junction lines to the district office.

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 and from there to the post of supervisor.



   All the switches employed in the present invention are of the same general type in which the wipers are rotated forward on their associated fixed contacts, under the influence of a jerk advancing magnet. The direction of rotation of each wiper is shown in the drawing. Each time this magnet becomes de-energized its return spring moves the switch wipers forward one notch on the fixed contacts.



   A detailed description of a regular fire warning will now be given. The fire alarm station shown in Figure 1 and designated FS-249 can be of any known type of construction, for example, the glass break type or other type, in which a handle is. rotation and this has the effect of momentarily opening the contacts 5 which are normally closed. District office relay 40 and high resistance relay 30 are normally energized by line conductors 2 and 3 and through normally closed contacts.

   The high resistance lead 6 is normally switched off by the contact 5, so that opening the line conductors 2 and 3 at the contact 5 introduces the high resistance into the line 6. As a result of this, relay 40, which is low resistance, de-energizes while relay 30, which has very high resistance, remains energized in series with lead 6.



   The relay 40, when de-operating, places in the rear contact of the armature 41, the earth by the fire warning lamp AL and by the winding of the relay 25 towards the battery. The relay 25 closes the armature 26 a circuit for the if. general aooustic alarm SG. The fact that the SG signal resonates informs an attendant in the station room that a warning

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 happened while the lighting of the AL lamp indicates the particular fire station or the place from which to warn it. ment was launched. At the rear contact of the armature 41, the earth also extends by means of the armature 32 and its front contact, by the winding of the relay 20 and the resistor towards the battery.

   In operation, relay 20 closes a latch circuit for itself extending from ground to armature 23 and its forward contact, through armature 32 and its forward contact to relay 20. A branch of this oirouit extends to the lamp AL so that it remains on when the relay 40 activates again as a result of the oontaots 5 closing. In the front contact of the armature 22, a hole is prepared and extends to the conductor 50 while in the front contact of the armature 21 a circuit extending through the conductor 51 is prepared for the relay 10.



   On contact with the front of the armature 24, the relay 20 earths the starter conductor 247 which is common to all the other groups of RG relays associated with all the fire alarm stations connected to this control station. triot. This earth extends through the conductor 247, through Figure 4 and Figure 3, the rear contact and the armature 301, the conductor 237, the rear contact and the armature 231, through the winding of relay 200 to the battery in the SS succession switch. The relay 200, by operating, activates its armature 201 and places the earth towards its front contact by the winding of the relay 205, the rear contact and the armature 211, by the winding of the rotating magnet 210 towards the battery.

   Due to the high resibtanoe of relay 205, the rotating magnet 210 does not energize in this circuit. In forward contact with the frame 202, the test slider 215 is connected to a point between the advancing magnet 210 and the re-

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 lais 205. The fixed contacts of the wiper 215 connect the said *. various groups of relays associated with RG to all the warning lines in this district, lines of which only one has been shown as an oonnection. All non-equipped lines have their contacts constantly earthed. The earth therefore extends from the fixed contact on which the wiper 215 rests, by the wiper 215, the armature 202 and good front contact, towards the junction point of the relay 205.

   The other side of this relay is also grounded to armature 201 and is therefore shorted. A connection of this circuit extends through the armature 211, through the winding of the advancing magnet 210, towards the battery. Magnet 210 is energized and when it actuates contacts 211, it de-energizes and rotates wipers 215 and 216 to their first set of fixed contacts. The first contact in the series of wiper 215 extends to a group of relays similar to RG and through a similar conductor 50 to earth, to the armature 23 of relay 20 of this other group of relays. This earth therefore extends rearwardly through wiper 215 to re-energize magnet 210 and place the trotters on the next set of stationary contacts.

   This operation continues until the fifth fixed contact to which the conductor 50 is connected is reached. In this case the relay 50 has functioned to remove from its armature 23 the earth extending through the conductor 50, and to replace it with the battery coming from the relay 20 and extending through its front contact and the armature 22. The relay 205 is therefore no longer short-circuited, but is energized from the earth on the armature 201, by the relay 205, the armature 211 and then by the winding of the armature. 'advancement magnet 210, towards the battery.



  Magnet 210 does not work in series with relay 205 and the saooaded advancement operation of the succession switch

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SS is stopped and its wipers remain on the fifth set of fixed contacts.



   In contact with the front of the armature 206, the relay 205 places the earth by the slider 216, the fifth contact on which it currently rests, the conductor 51, the armature 21 and its front contact, by the winding from relay 10 to the battery. While operating, relay 10 places the earth on all its reinforcements, which connects the earth to each of the conductors 60, 61, 62, 63 and 64 extending through the cross connection block OB towards the contacts. stationary of the SN transmitter.



  The CB cross connection block is provided so that additional fire warning stations can be connected or two existing stations removed or modified. The right terminals of the connection block are linked to other groups such as RG, associated with other fire warning lines under the supervision of that particular district station. The conductors are all, at the terminal, connected in a cross to the left terminals of the bloo CB in concordance with the number of the flood warning box. The cross connection of the wires to the terminal block CB and the connection to the fixed contacts of the wiper 270 of the transmitter S determine the code which must be transmitted and which is associated with each line or individual warning box, a box being provided. by line.

   In contact with the front of the armature 203, the relay 200 places the earth on this armature by means of the winding of the relay 220, towards the battery. Relay 220, when excited, opens at the rear oontaot of armature 222 a point in the oirouit of relay 240, and at the rear oontaot of armature 221 the earth is removed from the oontaot fixed wiper 271 and extended toward the front oontaot of this frame through the winding of relay 290, toward the battery.

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   Relay 290 is associated with the relay group comprising the TC-1 trunk circuit, controlling the trunk line comprising conductors 233 and 234, which runs from the district station to the supervisor's office. At armatures 291 and 292, relay 290 transfers the junction circuit from its rear contacts to the front contacts. In contact with the front of the armature 292, the earth is extended by the winding of the relay 280 towards the battery. Upon contact with the rear of the armatures 281 and 282 of the relay 280, the relay 285 is removed from the line conductors 233 and 234 by which it was previously kept energized. At the front contacts of these armatures, the junction line is extended to the armatures 291 and 293 of relay 290.

   In contact with the front and the frames 283, the battery obtained through the resistor is connected to the frame 294, but this contact is now open and this has no effect. As a result of the de-operation of relay 295 its armatures withdraw and at armature 287 and its rear contact the earth is placed by means of the lamp TC1 towards the battery, which indicates to an attendant from the district station that junction lines 233 and 234 extending to the overseer station were taken into service.



   After the trunk line conductors 233 and 234 have been taken into service by the switchgear at the district station and extended to the supervisor station, they must be placed in such a condition that they receive the the warning box which has been activated. Junction lines 233 and 234 terminate in Figure 5, at the location of the supervisor station, in a pair of relays 500 and 505 in the TC-2 junction circuit. The relay 500 is connected to the lower conductor 234 by the armatures 512 and 518 and the relay. 505 is connected to the inverter 233 by the armament.

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 tures 511 and 517. These relays were normally energized by means of the junction line in series with relay 285 of the TC-1 junction line.

   When relay 280 removed its armatures 281 and 282, it disconnected relay 285 from the line conductors and thus enabled relays 500 and
505 to de-energize, At the armature 501 and its rear oontaot, the relay 500 places the earth through the TL lamp, then through the relay 540, to the battery. The lighting of the TL lamp informs the supervisor at his post that this junction line is taken in service and is about to receive a fire alarm signal through this line. Relay
540 attracts its armature and connects the earth to horn B to acoustically inform the overseer of this warning.

   By de-energizing, the relay 550 opens the earth loop coming from its frame 506 and withdraws the earth motor extending towards the fixed oontaot of the oheroheur switch.
F in order to mark this junction line in the row of fixed contacts of the finder. The armature 507 closes at its rear contact, places the earth on the conductor 544 extending towards figure 6, and through the winding of the relay
600, to the battery at oheroheur F.



   All connecting lines such as TC-2 for example which are not currently in service and are all extended to the fixed contacts on which the wiper
616 rotates, have the earth placed on them in a manner analogous to that shown in frame 506. All other unserviced or unserviced connection lines will have their fixed contact constantly grounded. In this case, the fixed contact to which the conductor 540 is attached will have the earth removed from the armature 506.

   The moment the relay 600 is actuated, it closes its front contact on the armature 601 and completes a circuit extending from the earth on the last fixed oon- tact on which the wiper 616 rests, to the wiper.

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 616, the armature 601 and its front contact, the rear contact and the armature 614, by winding the feed magnet 615 towards the battery. The magnet 615 operates and at the rear contact of the armature 614 it opens its own circuit and when it de-energizes it advances the trotters 616, 617, 618 and 619 to the first set of fixed contacts.



  As this series of fixed contacts are connected to a junction ligie which is not in use at this time, there is a ground supplied to the slider 616 and the magnet 615 is again energized to interrupt its own circuit, and in getting de-excited he makes the trotters move up a notch. This operation continues as long as the baby walker 616 rests on fixed contacts which are earthed. When the fifth fixed contact is reached, where the conductor 540 is attached, there is no earth on this contact and therefore the operation of the rotating magnet is stopped.



   When the relay 600 operated, it closed its armature 602 from the earth to its front contact, by the armature 606 and its rear contact then by the winding of the relay 610 slow to release. , to the battery. When the slow release relay 610 has operated, it completes a circuit extending from ground to the armature 611 and its forward contact by winding the slow acting relay 605 to the junction point. between the feed magnet 615 and the trotter 616.

   As the rotating magnet 615 was operating and the baby walker 616 was rotating on the stationary contacts, the relay 605 was shorted to one side of its winding from the armature 611 and the other side from the earth and the fixed contact on which the slider 616 turns. Relay 605 has a high resistance such that the feed magnet 615 cannot operate in series with it when the wiper 616 reaches the fixed contact on which the

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 conductor 540. There is no earth in this conductor and the rotation of the switch is stopped. Consequently, the relay 605 is energized in series with the advancing magnet 615.



  When relay 610 has operated, it has closed its armature 612 on the front oontaot to close a point in the circuit of the wiper 618, and at armature 613 it opens a point in the circuit of the wiper 619. When the operating relay 605 energized, it moved its armature 606 from its rear contact to its front contact, completing a latch circuit for itself extending from ground to the armature 602 and its front oontaot, by the armature 606 and its locking contact, by the winding of the relay 605 then towards the armature 614, by the winding of the feed magnet 615 towards the drums. At the rear contact of the armature 606, the oirouit for the relay 610 is interrupted and this relay slowly returns its armatures to normal.

   At frames 608 and 609, relay 605 connects the junction line to the R-1 receiver in Figure 7. At the front end of frame 607, it completes a hole extending from earth to armature 607, by the armature 603 and its front oontaot, the conductor 545, by FIG. 5 then, going down towards FIG. 10, by the winding of the relay 1005 towards the battery. Relay 1005 energizes and at armature 1009 and its forward contact, it completes a locking loop for itself extending from ground to armature 1021 of relay 1020, through armature 1009 and its before oontaot. The relay 1005 remains in the locked position, for a purpose which will be explained below.



   At the time 605 is energized, it also closes the armature 604 on its forward oontaot and places the earth on the conductor 670 towards Figure 7, by the winding of the relay 700 towards the battery. The relay 700 is therefore activated and

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 at armature 701 places earth on its front contact by means of a circuit extending through armature 711 and its rear contact, conductor 674, trotter 617 and fifth contact fixed of this wiper to which the conductor 541 is connected, by the winding of the relay 510 towards the battery.



  A branch of this circuit extends through the EL lamp to the battery. When the light comes on, the supervisor is informed that transmission of the fire station number is about to begin. Relay 510, to armatures 611 and o12, connects the junction conductors to the front contacts, and to armature 513 it keeps the circuit of relay 515 open.



   As a result of the connection of the junction conductors 233 and 234, a circuit is momentarily completed and extends from the earth over the armature 602 and its front contact, through the front contact and the front contact. armature 607, armature 612 and its forward contact (this is a momentary impulse and occurs before relay 610 has a chance to drop back and return its armatures to normal), trotter 618 and the fifth fixed contact on which it now rests, the conductor 542, the front contact and the armature 511, in the connection circuit TC-2, the rear contact and the armature 517, the upper conductor of junction line 233, armature 281 and its front contact, in junction circuit TC-1, armature 291 and its front contact,

   the rear contact and the armature 241 of the relay 240 in the SN transmitter, then by the winding of the relay 235 towards the battery. In.' As a result, relay 235 energizes and at its forward contact and armature 236, it completes a latch circuit for itself extending from the battery through coil 235, armature 236 and its front contact, the coil of relay 240, rear contact of armature 232, to earth.



  The relays 235 and 240 are therefore kept energized in

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 series when the earth pulse is removed from the line at armature 612. Upon contact with the rear of armature 241, relay 240 opens the initial oirouit of relay 235.



   In contact with the front of the armature 243, a circuit is prepared and extends through the lower connecting conductor
234 to transmit pulses from the transmitting switch SN. At the front oontaot of frame 242, the earth is extended by frame 251 and its rear oontaot, frame 261 and its rear oontaot, rear contact and frame 252, by the winding of relay 245 to the battery, around the high resistance bypass. The relay 245, by being excited, energizes its armature 246 and connects the earth to its front contact, by the armature 253 and its rear contact, by the winding of the advancing magnet 260 towards the battery.

   A branch of this circuit also extends from the earth on the armature 246 towards its front oontaot, the front contact and the armature 243, the front oontaot and the armature 293 of the relay 290 , by the compensating resibtanoe, the front oontaot and the frame 282, the connecting conductor 234, figure 5, the frame 518 and its rear oontaot, the frame 512 and its front oontaot , the conductor 543, the fifth fixed contact of the seeker F on which the trotter 619 rests at the same time, the rear contact and the armature 613, the front contact and the armature 609, the conductor 673 towards FIG. 7, to the winding of relay 740 and to the battery.



   The relay 740 operates under the effect of pulses received by this oirouit coming from the armature 246. Each time the advancement magnet 260 is energized, it opens the rear contact of its armature 261, this which opens the excitation circuit of relay 245. When falling, relay 245 opens at frame 246 the opening of the advancing magnet 260 and returning to normal, this magnet causes the trotters each time to advance.

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   270, 271 and 272 of the transmitting switch in a forward direction on their associated sets of stationary contacts.



  The wipers 271 and 272 have no effect at this time, but the wiper 27Q which now rests on the first fixed contact, completes a circuit extending from earth to the first frame of relay 10, through the block CB of cross connection, the conductor 60, the first fixed contact of the SN transmitter, the wiper 270, the front contact and the armature 291, the front contact and the armature 281, the upper junction conductor 233 extending towards figure 5, the armature 517 and its rear contact, the armature 511 and its front contact, the oonduotor 542 connected to the fifth fixed contact On which the contactor 618 of the finder F currently rests , the front contact and the armature 608, the conductor 672, towards a jonotion point between the trotters 761 and 762 of the receiver Rè1 in figure 7.

   Each time the wiper 270 encounters the earth at its fixed contacts, it transmits this earth to the wipers 761 and 762. As soon as the advancing magnet 260 de-energizes, it again closes the oirouit for the relay 245 which at its armature 246 again extends the earth towards the advancing magnet 260 and also towards the relay 740. This joint action between the magnet 260 and the relay 245 continues for a certain time, as will be explained later.



   The wipers 270, 271 and 272 are therefore continuously moved on their fixed contacts in a forward direction and when the wiper 270 meets the fixed contacts to which the conductors 61, 62, 63 and 64 are connected, the earth is then extended. by this wiper from the cross connection bloo OB and the reinforcements of the relay 10 which are all actuated. It can also be seen that each time the relay 245 is energized, it transmits an earth pulse through the lower junction switch 234 to the reactor switch R-1 and the relay 740, which

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 alternately energizes and de-energizes this relay.

   Likewise, each time the trotter 260 meets one of the fixed earthed contacts, it transmits an earth from the armatures of the relay 10 through the upper connecting conductor 233 to FIG. 7 and the connection points between the rubbers 761 and 762.



   Referring now to the operation of receiver R-1 of figure 7, when relay 740 is alternately energized and de-energized from the earth coming through the lower line conductor, it opens and closes the earth at the bottom. front contact of armature 741, by rear contact of armature 731 of relay 730 to armature and rear contact 732, by winding of feed magnet 750 , to the battery. As a result, the magnet 750 is energized and when the relay 740 drops out it opens its armature spring 741, pulling it away from the earth, which allows the advancing magnet 750 to de-energize. The trotters 760 through 764 inclusive of the R-1 receptor are therefore moved forward.

   The slider 764 advances to its first fixed oontaot but without closing auoun ouit due to the fact that the circuit is open to the armature 701 which is actuated by the relay 700.



   It should be noted that the wipers 760, 761 and 763 are now opposite the last of their fixed contacts, while the wipers 762 and 764 are based on their first series of brawling contacts. Therefore, when the wipers 762 and 764 have advanced once around the set of stationary contacts, they rest on the last contact while the wipers 760, 761 and 763 are in position opposite their first series of stationary oontaots. It takes 50 advancements or 360 to make a full revolution and bring the wipers back to their normal position.

   The slider 762 is currently aotated and rests on its first oon-

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 fixed tact, and the SN transmitter of figure 2 has also advanced the trotters to the first set of rigid contacts, so that the trotter 270 now rests on the fixed contact connected to the conductor 60 and this conductor has been put on. to earth via relay 10 in figure 1.

   Consequently, this earth is extended by the line conductor 233, as indicated, and the conductor 662 to the junction points between the rubbers 761 and 762 then through the trotter 762 and the first fixed contact on which it currently rests, lead 770 to Figure 8, then through the coil of relay 800, to the battery in the first group of digit relays S1. As soon as the 8UO relay energizes, it completes a locking circuit for itself by its forward contact and the armature 801, towards the earth by a hole extending through the conductor 558 towards figure 9, towards the rear contact of the I021 armature, towards earth to relay 1020 in figure 10.

   When baby walker 762 advances to the next fixed contact, this earth is removed from relay 800, but it remains locked in the exited state. The next time relay 740 energizes and de-energizes, feed magnet 750 would advance trotter 760 and 764 to the second set of fixed contacts.



  At this time, however, auoun circuit is not completed through the trotter 762 by the driver 672 coming from the transmitter SN and its trotter 270, because this trotter currently rests on a fixed contact to which is attached an oonduo. - aor that has not been grounded by relay 10. As a result, the digit store relay B of group S-1 in figure 8 is not energized. However, when the trotter 270 reaches the third brawl oontaot and the trotter 762 of FIG. 7 also reaches its third stationary counter, 1a. land is thrown through the circuit from

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 from the conductor 61 through the slider 762, the conductor 772, the coil of the digit storage relay 820, to the battery.

   At armature 821 and its front contact, relay 820 locks to driver 558.



   This simultaneous and synchronous operation of the transmitting switch SN of figure 2 and of the receiving switch R-1 of figure 7 continues and each time the scrubber 270 encounters a fixed contact which is grounded by a conductors 60, 61, 62, 63 and 64 which corresponds to the code number of the actuated warning box, this earth is transmitted by the wiper 762 and the conductors 770, 772, 777 and 782 each become earthed and consequently Aotion relays 800 and 820 of group S-1 for the first digit of the fire alarm box number, relays 840 and 850 of group S-2 for the second digit, and relay 860 of group S- 3 for the third digit.

   Each of these relays remains energized and latched to conductor 558 after the earth has been removed from the scrubber 762.



   If we now refer to figure 13, oet-. The figure is a code card diagram showing the number exposed each time one of the relays A, B, C, D of groups S-1, S-2, and S-3 is activated in combination. It should be noted that when the relays A and 0 of a group are activated and actuate their armatures, the number two is exposed on the lamp panel. When the relays B and D are energized, the number four is illuminated on the panel on the lamp panel and likewise, when relay 0 is energized, the number 9 appears on the lamp panel.



   If we refer to the oirouit of figure 8, we will remember that the relays 800 and 820 are kept open and that consequently a circuit is closed from the earth.

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 on armature 802 and its front contact by armature 812 and its rear oontaot, armature 822 and its front contact, by lamp No. 2, towards the battery. Therefore, No. 2 is exposed to the post of supervisor. These lamps are arranged as will be understood in a normal lampholder panel so that the entire number shown is in consecutive order in three different groups S-1, S-2 and S-3. This activated lamp No 2 constitutes the first digit of the code number.

   As the relays 840 and 850 of group S-2 have been de-energized, it will be observed, referring to figure 13, that the lamp No 4 is lit from the earth on the armature 841 and its contact of rear, armature 842 and its front contact, armature 843 and its front contact, by lamp 4, towards the battery. In the third series of relays S-3, the relay 860 is actuated and therefore the number 9 is exposed, by means of a circuit going from the earth to the frame 861 and its rear contact, through the armature 862 and its rear contact, 863 and its forward contact, armature 864 and its rear contact to the lamp 9 and to the battery.

   The complete number 249 of the activated fire station is therefore displayed in front of the supervisor and informs him of the existence of a fire at that particular alarm box.



   Returning now to the operation of the R-1 receiver in figure 7 and the SN transmitter in figure 2, these switches after setting the numbers on the DS-1 display panels continue. in advancing their rubbers forward under the control of their respective advancing magnets. When the wiper 271 has advanced until it has encountered the fixed contact 274, it completes a circuit extending to earth connected in multiple by means of all the fixed contacts remaining after the contact 274, for example

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 the slider 211, by winding the slow release relay 225 towards the battery.

   Relay 225, by energizing, closes the earth of its armature 256 on its front oontaot and by winding relay 250 towards the battery, to energize this relay. At armature 253 and at its rear contact, relay 250 opens the orifice extending towards the forward magnet 260. At the rear contact and at armature 252, it interrupts the circuit of relay 245 and this relay restores armature 246 to normal. At armature 251, relay 250 opens a new point in the circuit of relay 245.

   When the relay 255 was energized, it closed the armature 257 on its front contact by completing a circuit which extends from the earth to the fixed contact 274, through the wiper 271, the front contact. and the armature 257, the armature 261 and its rear connector, the front contact and the armature 259, then by the winding of the advancing magnet 260, towards the battery. Relay 255 closes the front contacts on armatures 258 and 254, with no effect at this time. As a result, the advancing magnet is pulled out again. Upon energizing, it opens its armature 261 to interrupt its own excitation circuit so that it is now self-interrupting and continues to operate as long as the wiper 271 rotates on fixed earthed contacts.



  The rubbers 270, 271 and 272 are therefore moved further in the forward direction on their fixed oontaot.



  During this advancement interval, however, there are no further pulses which are emitted by the junction motor 233 to the receiver by means of the slider 270. Similarly, no further pulses are transmitted. started by the lower conductor 234 towards the relay 740 of figure 7, and consequently the continuation of the operation of the transmitter SN does not control the receiver R-1.

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   If we now return to the operation of the re-switch R-1 in figure 7, when the wiper 764 of this switch has moved forward and rests on the fixed contact 766, the wiper 271 of the transmitter SN in figure 2 rests. at the same time on the fixed contact 274; the switches have moved forward, as can be seen, by the same number of orans on their associated fixed contacts. The slider 764 resting on the fixed contact 766 will have the earth connected to this slider in multiple by all the remaining fixed contacts, through the winding of the slow release relay 720, to the battery. The relay 720 energizes and to the armature 722 and its fixed contacts it connects the earth by means of the winding of the relay 730 to the battery.

   At armature 723, relay 720 prepares the automatic advancement oirouit of magnet 750. At armature 731 and 732, relay 730 opens the circuit which initially exits the rotary magnet 750. The circuit d The excitation for this magnet is now completed by means of the slider 764 from the fixed earthed oontaots, by the armature 723 and its front contact, then by the rear contact and the armature 751, by the winding of the feed magnet 750, towards the battery. Each time this magnet exits, it interrupts its own circuit at armature 751 and falls back, which again advances the wipers 760 to 764 inclusive on their fixed contacts.

   When the wiper 764 reaches its last fixed contact 767, the forward operation is momentarily interrupted due to the absence of earth on this contact.



   In the transmitter SN, when the wiper 271 reaches the fixed contact 276, there is no longer any earth on this contact and the advancement magnet 260 no longer works. Likewise, the slow release relay 255 has been interrupted at this point, and it de-activates by bringing all its functions back to normal.

  <Desc / Clms Page number 23>

 reinforcements. At armature 256 it opens the output of relay 250 and allows it to drop, and the latter returns its armatures 251, 252 and 253 to normal. At armature 259, relay 255 opens the automatic interrupt circuit of the advancement magnet 260.

   The SN transmitter circuit is currently in the state in which it was previously when the fire warning signal first arrived and when the transmitter was normal, likewise, in the receptor R-1 of Figure 7, a similar action has taken place.



  When the wiper 764 reaches the fixed contact 767, the earth is no longer transmitted by the wiper 764 to maintain the relay 720, and a connection of this circuit to energize the advancing magnet 750. Consequently the relay 720 slowly de-energizes. This relay is adjusted and arranged in such a way that it returns its armatures to normal before the slow release relay 255 of the transmitter SN, with a view to keeping these switches in synchronism during the second transmission.

   At this moment, it should be noted that the transmitter 272 slider is in position in front of the first oontaot of the row of fixed oontaots instead of the last contact, as was the case in its normal position; in the R-1 receiver, the wipers 760, 761 and 763 are placed in position opposite their first series of fixed oontaots, instead of the last series, and the wipers 762 and 764 are placed in position on their last series of fixed contacts.



   The transmitter SN of FIG. 1 is again activated as it was in the first case, to send the same code number to the receiver R-1 and to control its operation. The rubbers 270, 271 and 272 are again moved in the forward direction on their fixed contacts as a result of the aotion of the advancing magnet 260. Each time the relay 245 energizes, it initiates a earth pulse of

  <Desc / Clms Page number 24>

 the armature 246 and its front contact, by the conductor 234, by the winding of the relay 740 of the receiver R-1, towards the battery.

   As a result, relay 740 again follows the energization and de-energization of relay 245, causing the advancing magnet 750 to advance the wipers 760 to 764 on their fixed contacts in the forward direction, as described above. 'previously described. The SN transmitter wiper 270 also rotates on its fixed contacts and collects the earth of the conductors 60, 61, 62, 63 and 64 coming from the actuated relay 10, and transmits these grounded pulses by the upper line conductor 233 to the junction point between the trotters 761 and 762;

   but in this case, however, instead of being transmitted by trotter 762 which is now away from the fixed contacts, they are transmitted by wiper 761 and its fixed contacts on which it now rotates. These fixed contacts are connected to a second group of DS-2 digit storage relays to which equipment similar to that shown in figure 6 is connected.

   In the same way that previously, these relays such as 810 and 820 for the first digit, 840 and 850 for the second digit, and 860 for the third digit, are energized so that these relays operate. and display the number 249 of the fire warning box in a manner analogous to what occurred on the first lamp panel. This lamp panel is a copy of the first and is arranged immediately above it, and the duplicate transmission is an indication to the supervisor at the desk that the correct signal has been received.



  If a number displayed on the second group of DS-2 digit storage relays is different from that shown on the first group DS-1, the supervisor finds that there has been an error somewhere and that the equipment is not functioning properly *

  <Desc / Clms Page number 25>

 
When the wiper 271 reaches its fixed contact
274, it again completes the circuit through the winding of slow release relay 255. This relay, when energized, closes its armature 256 and completes the blackout for relay 250.

   Relay 250 activates its armatures and allows relay 245 to be de-energized, which opens its armature 246 so that no other earth impulse is emitted by the connection line to activate relay 740 in fig. 7 and in such a way that the transmitter SN no longer has any control over the receiver R-1. Relay 255, to its armature 257, completes a circuit going from the earth to the fixed contact 274, through the wiper 271, the front contact and the armature 257, the armature 261 and its rear oontaot, the contact front and armature 259, by winding feed magnet 260, towards the battery. At armature 261, magnet 260 interrupts its own sound and further activates trotter 270, 271 and 272 until the wiper 271 reaches its fixed contact 276 on which there is no earth. .

   As a result, relay 255 de-energizes and prevents the continued rotation of the switch which is now in normal. its initial position! Before this, however, the wiper 272 met the fixed oontaot 275 and it completed a circuit extending from the earth to the wiper 272, through the fixed oontaot 275, in multiple with all other remaining fixed contacts, for example. the armature 254 and its front contact, by winding the slow release relay 225, towards the battery.



  These relays are excited for a purpose which will be explained later.



   In the receiver R-1 of figure 7, the boosting magnet 750 was alternately energized and de-energized during this period, by means of the hole extending from earth to the fixed contact 765, by the slider 763, winding

  <Desc / Clms Page number 26>

 slow release relay 720, to the battery. This relay is energized as before and completes a circuit at the armature 722 for the relay 730, which actuates its armatures 731 and 732 to remove the control from the advancement magnet 750 to the relay 740. A l armature 723 and at its forward contact, relay 720 completes the automatic interrupt circuit for the advancing magnet 750.

   The earth is now extended from the fixed earthed contacts 765 through which the slider 763 rotates, by the armature 723 and its front oontaot, the rear contact and the armature 751, by the winding of the feed magnet 750, towards the battery. The advancing magnet interrupts its own circuit to advance the sliders 760 and 764 inclusive on their fixed contacts. When the slider 763 reaches its stationary contact 769, no earth is available for the advancing magnet 750.



  As a result, this magnet dies out. The slow release relay 720 likewise drops off slowly, and at its armature 722 it opens the circuit of the relay 730 which returns its armatures to normal. However, before relay 720, which is slow to release, fully returns its armatures to normal, a loop is completed which extends from the grounded contact on which the slider 760 now rests, through the armature 721 and its front contact, by winding relay 710, which is slow to release, towards the battery. The relay 710 is energized and opens its armature 711.

   Another connection of this earth circuit extends through conductor 547, through FIG. 6, through contact 560 of the automatic transmission key AT, FIG. 5, through conductor 554 towards a junction of a o removed from the circuit extending towards the armature 1007 and its front contact in the relay 1005 which, as we will remember, was locked in the excited state, through the winding of the relay 1010, towards battery. The other jonotion

  <Desc / Clms Page number 27>

 extends through the OS code transmitter of Fig. 9, through lead 554, through the coil of relay 930 to the battery.

   This is in order to initiate the operation of the CS code transmitter, which switch is arranged to translate the code number produced on the group of digit storage relays DS-1 of figure 8, and translating it into digital digits which are suitable for controlling the punch recorder PR, as will be explained later.



   After the relay 930 of the code transmitter CS and the relay 1010 of figure 10 are energized, the relay 720 of figure 7 has completely released its armatures and opened at the forward contact and at armature 721 the initial circuit of relay 710, but this relay remains powered by its other circuit. When relay 710 energized, at its rear oon .. and armature 711, it opened a circuit extending from ground to armature 701 and from its forward oontaot through l the armature 711 and its rear contact, the driver 674, the contactor 617 of the researcher F, the driver 541 to the relay b10 of the junction circuit TC-2, to the battery.

   Relay blO drops out and disconnects the junction conductors b42 and b43 from armatures 511 and 512. At armature 513 it closes the circuit of relay 515 and this relay operates from earth on armature 1006 , figure 10, by the conductor 556 which is common, the rear oontaot and the armature 513, by the winding of the relay 515, towards the battery Relay 515 connects the connecting conductors 233 and 234 to the conductors 546 and 550. At the forward contact of the armature 616, it places the earth on the relay 505, which allows this relay to energize again and removes from its armature 507 the earth of its contact of. rear, which was previously extended by conductor 544 to relay 600 of researcher F.

   As a result, relay 600 de-energizes and at

  <Desc / Clms Page number 28>

 the earthed armature 602 and on its front contact it opens the locking circuit for the relay 605 and this cable de-energizes and releases its armatures. At frames 608 and 609, relay 605 opens the junction line extending to the receiver R-1 in figure 7. This release of the transmitter SN, the finder F and the receiver R-1 has taken place. now. The TC-2 link circuit is also now able to retransmit the received number.



   The system has now been activated to receive the fire warning number and duplicate it at the supervisor station. The operation which will now occur concerns the actuation of the transmitter T, figure 6 and of the code transmitter OS in figure 9 to activate the recorder-printer PR, so as to leave a permanent indication of the number of the fire alarm box that was activated.

   The transmitter functions to initiate pulses through the junction circuit extending to the originating district station, shown in Figures 1, 2, 3 and 4, and to transmit these pulses into the R-2 receiver of the figure 3 and operate the digit storage relay group of figure 4, to display the number of the alarm box operated in that district station which is the station connected to the alarm box. particular who sent the warning.

   In addition to the transmitter T which is individually specific to the trunk line extending to that particular district office, the other transmitters connected to multiple conductors in the fixed contact row of the 665 wiper transmit this same warning number of fire at all other district stations connected to the supervisor station and activate receivers similar to R-2 in Figure 3 and display the numbers of the activated alarm box. Oeci aims to teach all firefighter companies in the

  <Desc / Clms Page number 29>

 district office ordered by the post of supervisor that this partial box has been activated and to let them know the number exposed, whether or not they are obliged to answer this fire call.

   Transmission of the number back to the originating district office is an indication to the attendant in that office that the signal has been properly transmitted to the supervisory office and has also been appropriately transmitted to the district office.



   It will be remembered that when the transmitter SN has completed its operation and the wiper 272 has returned to its normal position, the relay 225 has been actuated. With its armature 226 and its front contact, it closes a point in the bypass circuit of relay 20, with its armature 228 it places the earth on its front oontaot to energize relay 230 and on its contact. front and at frame 227 it closes a locking hole for itself, extending through conductor 238 to the earth on the front oontaot of frame 302, as shown. will explain in the following. At its rear contact and at the armature 232, the relay 230 removes the earth of the relay 240 which was kept energized in series with the relay 235. These two relays are consequently released and return their armatures to the normal.

   At the rear of the armature 231, the relay 230 opens the circuit extending through the starter conductor 237 to the relay 200 of the suooession switch SS, allowing this relay to return to normal. At the front contact and at the armature 201, the relay 200 opens a circuit of the relay 205 and this relay, returning to normal, removes the earth from the front contact of the armature 206 extending through the wiper 216 and its conductor 51, by the armature 21 and its front oontaot towards the relay 10 and towards the battery. Relay 10, by @@@ de-energizing, removes the earth from all its reinforcements extending towards them

  <Desc / Clms Page number 30>

 stationary of the SN transmitter.

   On contact with the front of the armature 203, the relay 200 removes the earth from the circuit of the relay 220, so that the relay likewise returns to normal. At the front contact of the armature 221, the relay 220 removes the earth from the circuit of the relay 290 and this relay then returns to normal, which closes the line conductors 233 and 234 on the rear contacts 291. and 293 so as to connect the junction line to the receiver R-2 of figure 3 in preparation to receive the pulses launched by this junction line from the transmitter D. On the front contact of the armature 292, the relay 290 opens a point in the circuit of relay 280 but its circuit is maintained by the rear oontaot and the armature 286 of the relay 285, by the conductor 284 towards figure 3 and towards the rear contact and the armature put to earth 316 of relay 315.



   At its rear contact and at armature 294, relay 290 closes a circuit from the battery through a resistor arm 283 and its forward contact, armature 294 and its back contact. rear, conductor 289 to FIG. 3, through coil relay 300 to earth. The relay 300 operates at its armature 302 and at its rear contact, and removes the earth from the first sixteen oontaots of each of the rubbers 352 and 353. At its armature 302 and its front oontaot, it places the earth by means of this oontaot and of the conductor 238 towards FIG. 2, by the armature 227 and its front contact towards the battery by the relay 225 to keep this relay locked as mentioned previously.

   The relay 225 being slow to release, this latch circuit is completed before its initial excitation channel is opened at the armature 254 and at its rear by the slow release of the relay 25b.

  <Desc / Clms Page number 31>

 



   It will be recalled, that the relays of the storage relay group Ds-1 of figure 8 had been energized and were held latched at their own latch contacts to conductor 558 which maintains the earth for these relays and also. on conductors 770, 772, 776, 777 and 782. The operation of the transmitter T and its control on the receiver R-2 of FIG. 3 are somewhat similar to the operation of the transmitter SN which controlled the receiver R1. This will now be explained.

   At the moment when the relay 1010 of figure lo was actuated, due to its circuit being closed from the wiper 760 in figure 7, it placed earth on its front contact and on the armature 1011 , by the condenser 549, by FIG. 5, by the winding of the relay 655 of the transmitter T, towards the battery. As conductor 549 is made common to all transmitters such as T, all relays such as 655 operate and act analogously on their associated transmitters. Relay 655, while operating places armature 658 earth on its front contact by winding relay 650 towards the battery. Reinforcements 556 and 657 have no effect at this time.

   Relay 650 is slow to operate and therefore relay 655 closes a circuit extending from the battery and resistor to armature 659 and its front contact, through rear contact and armature 651. , conductor 550 which is similar to conductors associated with all other TC-2 junction circuits, front contact and armature 518, junction conductor 234, armature 282 and its front contact resisted it, this junction compensator, the armature 293 and its rear contact, the conductor 244 of FIG. 3, the armature 311 and its rear contact, by winding of remake 305 then by rear contact and armature 316 of relay 315, towards the

  <Desc / Clms Page number 32>

 Earth.

   As a result, relay 305 received a momentary pulse before transmitter relay 650 was fully actuated. Relay 305, when operating, closes a latch circuit for itself at its forward contact and armature 306, in series with relay 310, to the battery and earth on armature 316. The relay 310 is working and this prepares a circuit for the operation of receiver R-2.



   Relay 650 has, during this interval, been actuated and at its grounded front contact and armature 652, it completes a circuit extending to slow to operate relay 635 and thereafter. a short interval the latter actuates its armature 636 towards its forward contact. This completes a circuit which extends from earth on armature 1011 to relay 1010, through conductor 549, this earth also energizing relay 655, and extends this earth through armature 656 and its forward contact. , the rear contact and the armature 626 of the relay 625, the rear contact and the armature 661 of the advancing magnet 660, the armature 627 and its rear contact, by the winding of the relay 630 to the battery and around the bypass resistor of this relay.

   The relay 630, when operating, closes the earth from its forward contact towards the armature 631, the rear contact and the armature 628 by the winding of the feed magnet 660 towards the battery. While operating, the feed magnet 660 opens its armature 661 from its rear contact, which interrupts the circuit of relay 630 which drops out and opens its forward contact and armature 631 to de-energize the magnet. advancement 660.

   The relay 630 and the feed magnet 660 therefore alternately energize and de-energize each other and the advancement magnet rotates the sliders 665, 666, 667 in the direction

  <Desc / Clms Page number 33>

 forward on their fixed contacts, each time it is de-energized. Whenever relay 630 energizes, it also places earth towards its forward contact and the armature
631, by another circuit extending through the rear contact and the armature 647, the front contact and the armature 651, the conductor 550 the front contact and the armature 518, through the lower junction conductor 234, armature 282 and its front contact, armature 293 and its rear contact, conductor 244, armature 311 and its front contact on relay 310,

   the armature 324 and its rear contact, by winding the relay 325 towards the battery. Relay 325 therefore operates and follows the pulses fed to it from earth on armature 631 of relay 630. When relay 325 operates, it places earth on a circuit from armature 326 and from its front contact by the armature 331 and its rear contact, the rear contact and the armature 332, by the winding of the advancing magnet 340, towards the battery. Each time the feed magnet 340 de-energizes, it advances the switch wipers 350, 351, 352, and 353 in the forward direction over their associated fixed contacts.



   It can be seen from the foregoing that the transmitter T and the receiver R-2 operate in synchronism in order to rotate their wipers by the same number of advances.



  In the transmitter T, when the advancing magnet 660 has energized and de-energized once, the wiper 665 rests on its first fixed contact to which the conductor 770 is connected. This conductor extends downward towards Figure 9 and then through Figure 8 to the forward contact and the frame 801 of relay 800 to earth on conductor 558, which is held on this conductor.

   This earth goes along towards the rear by this circuit, by the friction pad 665,

  <Desc / Clms Page number 34>

 the conductor 546 to figure 5, the front contact and the armature 517, the upper junction conductor 233, the armature 281 t its front contact, the armature 291 and its rear contact, the conductor 288 to Figure 3, the wiper 350 and its first fixed contact on which it currently rests, the conductor 450 to Figure 4, by the winding of the relay 400 to the battery. Relay 400 is in the S-4 Digit Store Relay Group and is one of the first digit relays in the number.

   The relay 400 is energized and at its forward contact and at the armature 401 it locks itself to the earth which is maintained on the conductor 238 extending through the socket 3 by the contact of. forward and armature 302 of relay 300 to earth. When the transmitter wiper 665 reaches the third fixed contact to which the conductor 772 is attached, another earth pulse is received from the relay 820 of Figure 8 and is transmitted through the circuit previously drawn, through the conductor of junction 233, to the wiper 350 and to its third fixed contact, by the conductor 452, by the winding of the relay 420 towards the battery. Relay 420 energizes and at its forward contact and armature 421 it locks itself to conductor 238 grounded.

   The relay 400 and the relay 420 are therefore kept energized and at their armatures they ignite the lamp N 2, by a circuit extending from the earth on the armature 402 and its front contact, by the armature. 412 and its rear contact, the armature 422 and its front contact, by the lamp 2 towards the battery. Referring to the code card diagram of Figure 13, it will be understood how other numbers may be exposed.



   Receiver R-2 and transmitter T continue to advance their wipers under the synchronous action of the two advancing rotating magnets, and each time

  <Desc / Clms Page number 35>

 As the 665 wiper meets fixed contacts to which the remaining conductors 776, 777, and 782 are connected, earth is sent through these conductors, from the DS-1 digit storage relay group, through the wiper
665 and thence through the top junction conductor 233 to the slider 350, and as the slider 350 passes over its fixed contacts, the conductors 455 and 456 are each grounded in turn, resulting in the excitation of relays 465 and 470 of group S-5 which, by being called,

   expose number 4 by means of a bending circuit from earth to armature 466 and its rear contact by armature 467 and its front contact, armature 468 and its front contact by lamp 4 to the battery. When the slider 350 earths the fixed contact to which the conductor 460 is connected, the relay 480 of the S-6 group operates and locks the earth on the conductor 238 and exposes the number 9 by means of 'a circuit extending from earth to armature 482 and its rear contact, through armature 483 and its rear contact, armature 484 and its forward contact, 'armature 485 and its rear contact, through lamp 9, towards the battery.



   The complete number of the FS-249 activated fire station has now been displayed in all district stations. This number has been displayed only once on the district station lamp panels and as a double precaution and to account for errors that may occur in the equipment, it is transmitted a second time to another lamp panel. This is done in a manner similar to how the SN transmitter transmitted the number twice to the R-1 receiver in Figure 7 and displayed it at the supervisor's office on two separate lamp panels.

  <Desc / Clms Page number 36>

 



   When the wiper 352 reaches the fixed contact 354, it collects the earth connected in multiple by all the remaining contacts, by the wiper 352, by the winding of the slow release relay 335, -to the battery. Relay 335 energizes, and at its forward contact and armature 337, it places earth through the winding of relay 330 towards the battery. Relay 330 is energized and actuates its armatures 331 and 332 to cut the initial circuit for energizing the advancing magnet 340. At armature 336 and its front contact, relay 335 prepares a circuit which has no effect at this amount because the wiper 351 rotates away from its fixed contacts.

   At the forward contact and at the frame 338, the relay 335 completes another circuit for the advancing magnet 340, a circuit which extends from the fixed earthed contacts on which the wiper 352 is currently circulating, by the front contact and the armature 338, the rear contact and the armature 341, by the winding of the advancing magnet 340, towards the battery. When magnet 340 energizes, it opens its own circuit to armature 341 so that it energizes and de-energizes as long as there is earth on wiper 352. When this wiper reaches its last fixed contact, the earth is no longer present. As a result, the forward operation is stopped and relay 335 slowly de-energizes and opens the circuit of relay 330 to its forward contact and armature 337.

   When this relay returns its armatures 331 and 332 to normal, it places the advancement circuit in a state to receive pulses again by means of the relay 325 from its earth armature 326. At this moment, the frot - tors 350 and 352 are on their last fixed contacts while the wipers 351 and 352 are opposite their first series of fixed contacts. The slider 351 is now in position to receive the impulses from

  <Desc / Clms Page number 37>

 earth coming from the DS-1 data storage relay group, through the jumper conductor in place of the 350 rub.



   In the transmitter T of Figure 6, a similar operation occurred. The wiper 666 by reaching its fixed contact 668 finds the earth on this fixed contact which is in multiple with all the remaining fixed contacts and extends this earth by its own wiper 666, by the winding of the slow relay to be released 620, to the battery. Relay 620 energizes and on its forward contact and armature 621, it places earth through the coil of relay 625 towards the battery. The relay 625, when operating, opens the armatures 627 and 628 by moving them away from their rear contacts, which interrupts the circuit for the relay 630 and the advancing magnet 660.

   The relay 620 actuates these armatures 623 and 624, without effect at this moment, due to the fact that the wiper 667 now deviates from its series of fixed contacts, At the front contact and at the armature 622, it however completes a circuit extending from the fixed earthed contact 668 by the wiper 666, the front contact and the armature 626, the rear contact and the armature 671, the front contact and the armature 622, then by the winding of the advancing magnet 660, towards the battery.



  The advancement magnet is energized and opens its armature 661 to cut its own circuit. As a result, the advancing magnet energizes and de-energizes as long as there is a fixed intact earth through which the slider 666 operates. When the wiper reaches its fixed contact 669 which is not earthed, the relay 620 has its circuit open and it drops out slowly. At armature 621, it interrupts the circuit of relay 625 which then releases its armatures.

   Relay 630 is therefore energized again.

  <Desc / Clms Page number 38>

 me it was initially done by a circuit extending from the battery by the winding of this relay, the rear contact and the armature 627, the armature 661 and its rear contact, the armature 626 and its rear contact, armature 636 and its forward contact towards conductor 549 which, as we will remember, is extended towards earth and towards the front contact and armature 1011 of the relay 1010 in figure 10. The relay 630 is then energized again and on its front contact and on the armature 631, it completes the circuit for the advancing magnet 660 and the latter in turn, operating. , interrupts the circuit for relay 630 at its armature 661.



  This action continues when the wiper 675 is again rotated on the fixed contacts to which it has access and as the earth has remained on the conductors 770, 772, 776, 777 and 782 extending from the powered group of relays d When storing digit DS-1, this earth is again sent through wiper 675, upper junction conductor 233, then through conductor 283, to wiper 351.



   The fixed contacts of the wiper 351 are now connected to the conductors leading to a DS-4 digit storage relay group which is an exact image of that shown in Figure 4, and these individual conductors are grounded to from the wiper 665 in a manner analogous to that of the conductors to which the wiper 350 has access. Accordingly, the number 249 is displayed by these relays on the DS-4 lamp panel which is a reproduction of the first.



  During this time, number 249 of the activated warning box remains displayed on the lamp panel at the supervisor's office in the two double lamp panels DS-1 and DS-2. At all district offices the duplicate lamp panels likewise expose the number due to the fact that transmitter T transmitted this number not only through the li-

  <Desc / Clms Page number 39>

 Connection gnes linked to the originating district office but to all offices in that system. This was possible because conductor 556 is common to all relays similar to 515 connected to other junction circuits and because coon- duotors such as 546 and 550 are individually specific to all other junction lines such as 233 and 234 extending to other district offices.

   When the scrubber 363 meets its fixed contact 355 it collects the earth through the remaining fixed contacts, in multiples, and extends this earth through the winding of the slow-release relay 335, to the battery. While operating, relay 335 closes an oirouit for relay 330 from the forward oontaot and armature 337. Relay 330 operates and opens the anterior excitation circuit for the advancing magnet 340 and a oirouit switch-off is then completed for the magnet from the earth on which the rotator 363 rotates, by the front contact and the armature 338, the rear contact and the armature 341, by the winding of magnet 340 to the battery.

   Magnet 340 energizes and at armature 341 and its rear contact, it interrupts its own oir-ouit, thus advancing the rubbers until the last oontaot brawl on which it is not reached is reached. there is no land. The circuit for the advancing magnet 340 is then permanently open and likewise the output of relay 335 is open and this relay slowly returns its armatures to normal. At the armature spring 337 and at its front contact, it interrupts the output of the relay 330 which in turn allows its armatures to drop. The wiper 351 is at this moment placed on its fixed oontaot 356 and prepares an oirouit extending through this wiper 351, the fixed contact 356, the armature 336 and its front oontaot, by the winding of the relay 320 towards the drums.

   This circuit is completed before relay 335 fully returns to normal, and it is completed from

  <Desc / Clms Page number 40>

 of the transmitter T by the oonduoteurs 288 as will be explained below.



   We will now explain the rest of the operation of transmitter T. When the trotter 676 reaches its fixed contact 668, it meets the earth on this one and this again energizes the slow release relay 620 and when this relay is activated. , it completes the circuit for relay 625 from earth on armature 621. At armature 622, relay 620 completes the self-interrupting circuit for advancing magnet 660 which interrupts its motion. pre circuit each kings he gets excited. The trotters 665, 666 and 667 are therefore moved on their fixed contacts as long as the trotter 676 collects the soil.



  At the front contact and to the armatures 623 and 624, the relay 620 completes a circuit extending at this time from the earth by fixed contacts connected in multiple of the trotter 677 and then by two paths by these reinforcements, one path extending through the winding of relay 645 towards the battery, and the other path extending through conductor 551 to hold relay 620 in the actuated position when wiper 676 is on a fixed contact 669 as will be indicated below.

   Relay 645 closes at its armatures 647 and at its front contact an opening of the battery by the winding of the relaib 640, the front contact and the armature 651, the conductor 550, figure 5, the oontaut front and armature 518, lower connecting conductor 234, armature 282 and its front contact, armature 293 and its rear contact, conductor 244, armature 311 and its front contact, to earth on frame 324 and its front contact.

   Relay 320 is kept actuated during the interval that relay 335 drops while relay 645 activates its arming 646 and its forward contact, to complete a circuit.

  <Desc / Clms Page number 41>

 extending from earth on frame 621 and its front oontaot through frame 646 and its front contact, oonduotor 546 to figure 5, front contact and frame 517, the upper line conductor 23, the armature 281 and its front contact, the armature 291 and its rear contact, the conductor 288, the wiper 351 and the fixed contact 356, on which it now rests, by the armature 322 and its front contact, then towards the winding of the relay 320 and towards the battery.

   In this interval, relay 335 has de-energized and relay 320 is therefore kept energized on its own latch contact and armature 322 independently of relay 335, by circuit oi above.



  Relay 640 places, when actuated by relay 645, the earth from its armature 641 on its front contact by means of a hole extending through conductor 552 to FIG. 5, through the OL lamp, towards the battery. The lighting of this lamp indicates to the supervisor that the transmission of the fire warning number which has been received, has been completed and sent successfully to all district offices in the system. After the number has been transmitted, some of the relays remain actuated while the switches themselves are in their normal position.



   During the time the transmission took place, the OS code transmitter, figure 9, functioned as will be explained now. The function of the code transmitter is to translate the number into code into a deci- mal number suitable for activating a PR printer recorder which punches a series of holes in a strip of paper, in oonoordanoe with the number of the warning box - tioned, so as to leave a permanent record of this number at the supervisor's post and also in the district offices.

   It will be remembered that when the slider

  <Desc / Clms Page number 42>

 760 reached its earthed contact in receiver R-1, it transmitted this earth through cooked air extending to relay 1010 in figure 10. This exited relay locked to its armature 1012 by armature 1007 and its actuated contact, when relay 720 de-energizes. At armature 1012, relay 1010 has closed a latch circuit by conductor 554 through Figure 4 to the CS code transmitter, and by winding of relay 930 to the battery.

   On armature 931, relay 930, while operating, places the earth on its front contact via a circuit extending through conductor 902, fixed contact 996, wiper 993, armature 921 and its rear contact, by the winding of relay 920 and the resistance towards the battery. Upon forward contact and armature 922, relay 920 closes a latch circuit for itself, extending to armature 931 and remains exited. At armature 923 it opens a point in the circuit of relay 900 and at its front contact and armature 924 it prepares a circuit to operate the PR printer recorder.

   Relay 930, to its earthed armature 933, places the earth by means of its front contact by armature 944 and its rear contact, by the winding of the slow-to-operate relay 900 and the resistance, towards the battery. After a short interval, relay 960 operates and places earth from its armature 961 on its forward contact, through the coil of slow to operate relay 970 and resistor, to the battery. Relay 970 operates slowly and places earth from its armature 971 verb its front contact to short relay 960.

   Relay 960, on falling, opens the earthed armature 961 by removing it from its front contact, and at its other contact it short-circuits relay 970. This alternating excitation and de-operation and the short-circuiting of one by the other oon-

  <Desc / Clms Page number 43>

 tine for relays 960 and 970 as long as earth is held at armature 933. Each time the relay
970 gets excited, it places the earth from its front contact towards its armature 973, towards the front contact and the armature 924, by the winding of the relay 905, towards the battery.



  Each time the 905 relay operates, it opens its back oontaots to the 906 and 908 frames which connect with all the printers in the district offices and with the supervisor's office. At the arma. ture 906 it opens an oirouit by relay 909, and this relay places, at armature 913 the earth towards the rear contact by the bell or warning gong G. This gong follows the impulses to make the sound resonate. number of the fire alarm box and also inform the supervisor of this number. At the front oontaot of the armature 913, the circuit extending to the printing magnet PR is interrupted and this magnet falls each time by making its armature 903 punch a hole in the ribbon. mobile 904 for each pulse.

   A series of these holes corresponds to the number of the activated warning box. It should be noted that this recorder-printer PR is of the usual type and is represented diagrammatically only. At armature 908, line 560 connecting the district office is opened by means of a circuit to Figure 3 and then through the coil of relay 360, to earth. At armature 361 and at its front contact, this relay follows the pulses supplied to it and actuates the PR-1 printing magnet, and at the rear the acoustic warning G-1 operates.



   If we come back to the function of the relay 970 of the CS code transmitter, on the armature 962 it places the earth by its front contact, by the winding of the feed magnet 980, to the battery, so that each time the

  <Desc / Clms Page number 44>

 relay 970 energizes and de-energizes, the advancing magnet energizes and de-energizes likewise and rotates rubbers 990, 991, 992 and 993 in the forward direction on their associated fixed contacts. It will be recalled that when the DS-1 digit storage relays of Figure 8 were energized to expose the number of the actuated alarm station, they remained actuated and were held from interlock ground by the driver 558.

   This earth extended by the locking contacts of these actuated relays and remained on the conductors 770, 772, 776, 777 and 782 which extended towards figure 9. It is therefore seen that the fixed contacts of the switch CS code transmitter that are connected to these conductors will have earth on them. Therefore, when the advancing magnet 980 energizes and then de-energizes, the trotter 990 will rest on its first fixed contact which will be earthed from the conductor 770. This earth extends through this fixed contact, by the slider 990 and by the winding of the relay 950, towards the battery.

   At its forward contact and at armature 951, relay 950 prepares a circuit for relay 940, but this blackout is not completed at this time because wiper 992 rests on its fixed contact which is not is not grounded. During this interval, relay 970 has been energized and de-energized once, which transmits a ground pulse to its armature 973 to relay 905 which operates all printers such as PR and PR-1. When the slider 990 advances to its second fixed contact, it is still connected in multiple to the conductor 770; consequently the relay 950 remains energized.



   The slider 992, coming to rest on its second oontaoixe, connects the earth which is on the conductor 772 and extends it towards the armature 921 and its front contact, the armature 951 and its front oontaot, by winding the relay

  <Desc / Clms Page number 45>

 slow release 940 to the battery. Relay 940 operates, and at the rear oontaot of armature 944, it interrupts the circuit for relay 960 which, being slow to operate, did not have time to retract its armatures.



   Relay 970 is released to let wiper 992 move to its second fixed contact by opening the feed magnet circuit 980 at frame 972 and at frame 973 that of the recorders. printers. At armatures 942 and 943 and their forward contacts, relay 940 prepares another advancement circuit for advancing magnet 980.



  At its forward contact and at the armature 941 it places the earth on one side of the relay 920 so as to short-circuit this relay and to allow it to bring its armatures back to normal. On contact with the front of the armature 921, it opens the initial oirouit of excitation of the relay 940. Before the relay 940 returns to normal, a circuit is however completed and extends by the earth on the fixed contacts connected in multiple of the trotter 994, by the armature 942 and its front contact, by the winding of the relay 940 towards the battery. As a result, relay 940 remains latched at its locking switch 942.

   A branch of this circuit of the wiper 994 extends through the armature 943 and its front contact, the rear contact and the armature 981, through the winding of the magnet. 980 advance towards the battery.



  The advancing magnet is thus energized again and each time it opens its own circuit. During the automatically interrupted rotation of the wipers, the soil rewound by the wipers 990 and 992 has no effect since the relay for which they are normally intended, i.e. 940, is already locked at the actuated state. The operation of relay 950 by these grounds has no effect for the same reason.



  The recorder-printer can no longer receive pulses since the circuit of relay 960 is open at armature 944.

  <Desc / Clms Page number 46>

 



  Until now only the first digit of the warning box has been transmitted and two punches have been made on the tape 904 indicating the number 2. It is understood for this purpose that in order to stop the recorder printer there must be an earth at the same time on the two wipers 990 and 992 from the conductors connected to their fixed contacts, the wiper 990 actuates the relay 9b0, while the wiper 992 actuates the relay 940, and if there is an earth on a only wipers, the printer recorder is not stopped.

   As long as the wiper 994 turns on the earthed contacts, it keeps the relay 940 locked in the exploited position; therefore the feed magnet 980 continues to advance the wipers 990 to 995 on their fixed contacts.



   When the wiper 994 reaches its fixed contact 998, earth is no longer supplied to this wiper because the conductor to which this fixed contact is connected is open at the rear contact of the armature 933. As a result, the circuit extending to the interlock armature 942 for relay 940 is interrupted, and this relay de-energizes slowly. Relay 950 drops out just as trotter 990 rests on the first of two dead fixed contacts. On contact in front of armature 941, relay 940 removes the short-circuit of relay 920. On armature 942 it opens its locking circuit and on front contact of armature 943 it opens its locking circuit. opens the advance screen for the rotating magnet 980.

   At the rear contact of armature 944, it again completes the circuit extending from ground to armature 933 and its A contact. front, by armature 944 and its rear contact, by the winding of switch relay 960, towards the battery.



  When relay 970 energizes from armature 961 it closes its earthed armature 972 On: 'its front contact,

  <Desc / Clms Page number 47>

 towards the advancing magnet 980. This magnet is energized and when the relay 970 is short-circuited by the relay 960, the contacts 972 are opened and the advancing magnet, by de-energizing, makes advance the sliders to the next series of fixed oontacts.



   The baby walker 992 now rests on its fixed contact 999 to close an ouit to print the second digit of the warning box number. This circuit extends from the grounded armature 931 and its front contact, through the conductor 902, the fixed oontaot 999, the wiper 992, the armature 921 and its rear contact, through the winding of relay 920 and the resistance to the battery. Relay 920 energizes and at its forward contact and armature 922, it completes the locking hole for itself extending towards the forward contact and armature 931, towards the end. - re. At armature 924 this relay closes the circuits through the printing magnet and when relay 970 energizes the second time, the printing magnet receives the first punching of the second digit.

   The advancing magnet is energized the second time from earth on frame 972. The wipers advance to the next fixed contact, so wiper 994 now rests on fixed contact 984 which is earthed. The wiper 990 rests at the same time on the contact 997 while the wiper 992 is in position on the contact 982. The fixed contact 997 is not connected to the earth from its conductor and therefore or or is not provided. for relay 950 at this time. However, earth is sent from conductor 776 to fixed oontaot 982, wiper 992, armature 921 and armature 951, but as relay 950 is not energized at this time no oirouit is o completed for slow relay to release 940.

   The oom- mutator then continues to advance under the action of relays 960 and 970 which actuate the feed magnet 980, and each time

  <Desc / Clms Page number 48>

 Once relay 970 energizes, it launches a current pulse to the printing magnet to mark ribbon 904. When wiper 990 reaches the third fixed oontaot after contact 997, it receives earth by the conductor 776. This earth is sent by the wiper 990, by the winding of the relay 950 towards the battery, and consequently this relay is exited again. The wiper 992 simultaneously reaches the third fixed contact after the fixed contact 982, and this is connected to the conductor 777 which is also earthed.

   This earth advances through the wiper 992, the armature 921 and its front contact, the armature 9bl and its front contact, then by the winding of the relay 940 towards the battery. During this interval, the 970 relay operated five times and fired four prints to the PR-2 printing magnet to punch four holes in the ribbon. The first printing of relay 970 was rendered ineffective by the fact that contact 924 is open.



   This represents the second digit of the fire warning number code and now the switch advances through the remaining fixed contacts without actuating the punch recorder. This is again accomplished by causing relay 940 to energize and latch energized by armature 942, interrupting at 944 the circuits for relay 960 to shut down the relay. operation of advancement from relay 970, and by closing at the front contact of armature 943 the circuit for the advancement magnet 980 from earth on the fixed oontats which are arranged after the contact fixed 984, by the wiper 994, the armature 943 and its front contact, the rear contact and the armature 981, by the winding of the advancing magnet 980 towards the battery.

   Each time this magnet gets excited, it interrupts its own circuit which continues to move the rubbers in the forward direction.



  At armature 941, relay 940 has also shorted relay 920; in this way, the relay drops to open a

  <Desc / Clms Page number 49>

 new point in the PR printing magnet circuit which is controlled by relay 905. Feeding magnet 980 continues to advance the rubbers until the scrubber 992 rests on its penultimate fixed oontaot which precedes
985.

   At this moment, the wiper 994 reached the fixed contact
983 and as there is no longer any earth at this fixed contact, the relay 940 de-energizes by opening the automatic feedback loop of the magnet 980 and by preparing the feedback again for the relays switch 960 and 970, and removing from armature 944 the short-circuit of relay 920, so that it is energized again as before after the first advance of rotary magnet 980, whose first advancement is done empty from the point of view of the printer recorder.



   The code transmitter will be, after this first empty advance, in a position to transmit the third and last digit of the fire warning number so that the printer recorder PR can record this number on the tape. . As it is number 9, nine impressions will be made on the ribbon and as the wipers 990.992 and 994 leave their last fixed contacts, the wipers 991.993 and 995 will be put in position on their first set of fixed contacts, the other wipers rotating in an arc in which there is no fixed contact. In this position, the No.991 wiper is on its first fixed ocntact to establish the connection with a wire on which there is no earth potential. The ruber 993 is also on a fixed oontaot which does not carry earth.

   Consequently, the relay 950 and the relay 940 are not activated. The advancement movement is therefore carried out under the control of relays 960 and 970 and the PR printer recorder is activated. When the wiper 991 reaches its sixth fixed contact to which the conductor 782 is connected, the earth is sent by the wiper 991 to energize the relay 950, but without effect because the wiper 993, on reaching its sixth fixed contact, does not meet the thread put

  <Desc / Clms Page number 50>

 To the earth; as a result, relay 940 is not actuated and the switch continues to advance. When the wiper 991 meets its ninth fixed contact 986, to which the conductor 782 is connected, there is a ground on this conductor and the relay 950 energizes again.

   At the same time, the wiper 993 encounters the earthed contact 987 which is constantly earthed, and it actuates the relay 940 by means of the armature 921 and its front contact, by the armature 951 and its front contact, by winding relay 940, towards the battery. Relay 940 operates and cuts off the drive magnet 980 control of relay 970 again.



  At armature 973, relay 970 opens the circuit passing through the printer recorder which has been actuated nine times, and at armature 972 it opens the circuit with automatic interruption of the advancing magnet 980 which receives maintaining its earth of the grounded fixed contacts on which the 995 slider is currently running.



   The wipers 991 and 996 turn at this time on fixed contacts to which no wire is connected. When the wiper 995 reaches its fixed contact 988, the earth is not present on this fixed contact since the armatures 931 and 941 are actuated at this time. As a result, the circuit for relay 940, extending through its forward contact and armature 942, is interrupted and this relay slowly returns to normal. The automatic advancement circuit for the rotating magnet 980, extending through the armatures 943 and 981, is also interrupted and the magnet comes to rest.



  When relay 940 returns to normal, it completes to armature 944 the circuit for relay 960 from earthed arm 933. The relay, when energized, closes the circuit for the relay. slowly functioning 970 and the latter, while functioning, again completes the oirouit for

  <Desc / Clms Page number 51>

 the rotating feed magnet 980. Earth on the armature
973 does not act to operate the recorder printer because relay 920 is not actuated at this time, its frame spring 924 being open. The feed magnet 980 therefore causes the wipers to advance one notch when the relay 970 opens its circuit, and the wiper 995 then rests on the fixed oontaot 989.

   Before the slider
995 leaves contact 988 after relay 940 has fully returned to normal, a circuit is completed and extends from the earth, through armature 941 and its rear contact 988, the wiper 995, armature 943 and its rear contact, rear contact and armature 923, rear oontaot and armature 911, by winding relay 900 towards the battery. When energized, relay 900 closes its armature 901 on its front locking oontaot and extends this earth towards bypass relay 910 until the wiper 99b arrives on oontaot 989 and thus withdraws. - if this bypass land. The relays 900 and 910 are then locked in series with the earth on the armature 931 and its front oontaot.



   At its armature 911, the relay 910 opens the initial excitation circuit of the relay 900 and at its front contact and at the armature 912 it earths the conductor 533 which extends to figure 10, through the winding of the slow release relay 1015, to the battery. Relay 1015 activates and with its armature grounded and its pre-contact 1016, it completes a loop extending through the winding of relay 1020 to the battery. The relay 1020 energizes and removes the earth which is on its armature 1021 from its rear contact. This earth extended by all the interlocking armatures of the relays which were kept excited from it, including the emma-

  <Desc / Clms Page number 52>

 DS-1 digit waste of figure 8.

   As a result of the removal of this interlocking earth, relay 1005 is de-energized and at its forward oontaot and at armature 1007, it opens the circuit for relay 1010 and this relay releases its armatures. At armature 1012, earth is removed from conductor 554 extending to Figure 9, to the start relay coil 930 of the code transmitter. Relay 930 therefore returns its armatures to normal. In frame 933, it opens the excitation circuit of relay 960 before it has had time to re-energize after the movement of wiper 995 to contact 989.

   At armature 933 and its rear contact, relay 930 places earth on fixed contact 989, earth which then goes through wiper 995 to the rear contact and armature 932 of relay 90, to the coil of relay 940 and to the battery. Relay 940 operates again and at its armature 943 and on the front contact, it extends the earth from the wiper 995 towards the rear oontaot and the armature 981 of the advancing magnet. 980. By automatic interruption of the magnet 980, the wiper 995 is advanced to its last contact which is not earthed. This contact, not being earthed, forces relay 940 to return to normal and the forward movement to cease. At armature 931, the circuit which had kept relays 900 and 910 in series with each other is interrupted and these two relays return to normal.

   Relay 910 opens to armature 912 the circuit of relay 101b and the latter in turn opens that of relay 1020. The wipers 991, 993 and 995 are now in position on their last set of fixed contacts while the wipers 990, 992 and 994 are in position one advance of their first set of stationary contacts, and the OS code transmitter has been returned to its normal position. All

  <Desc / Clms Page number 53>

 the relays have been released and are ready to receive another fire warning signal.



   Referring now to Figure 10, when relay 1020 opened the earth of its armature 1021, it removed the earth of conductor b58. The latter is extended through Figure 9 and is the interlocking conductor which has kept the ohiffre storage relays actuated. These relays 800, 820, 840, 850 and 860 therefore release their interlocking armatures and remove the earth from the conductors of code 772, 776, 777 and 782. At their other armatures, the lamps on in the lamp panel which , in this case, exhibit number 249, are off.



   When the relays 1005 and 1010 have released their armatures, they have prepared the releases of the various switches and other relays included in this connection, and this will now be explained. On contact with the front armature 1006, the earth is removed from the conductor 556 which extended through the rear oontaot and the armature 513 towards the relay 515. This relay consequently releases its armature and connects the conductors of jonotion 233 and 234 to his rear mates. At the front oontaot and frame 1012, earth is removed from conductor 554; a connection of this circuit released, as will be remembered, the relay 930 of the code transmitter.

   The other side extends to the automatic transmission olef AT, through conductor 547 extending through Figure 6, to relay 710 of the R-1 switch of Figure 7. This allows relay 710 to release. and to close its frame 711 on its rear contact. At frame 1011, the earth is removed from the oon-

  <Desc / Clms Page number 54>

 Motor 549 extending through Figure 5 to transmitter relay 655 T. Relay 6bo de-energizes and releases its armatures, and at armature 658 it opens the baked black of the slow to attract relay 650. Relay 650, coming to normal, in turn opens to armature 652 the circuit of relay 635. Returning to normal, relay 635 opens its armature away from the front contact 636.



   At its forward contact and at armature 1008, relay 1005 opens the circuit which extends from the earth to the last fixed contact on which the wiper 667 of transmitter T rests, by armature 624 and its front contact, relay 620 being actuated at this moment, by conductor 551, through figure 5, by front contact and frame 1008, conductor 548, resistor 653, con- forward tact and the armature 657, the fixed contact 669 and the wiper 666, by the winding of the slow release relay .. rer 620, towards the battery.

   A branch of this circuit extends through the front contact and the armature 626, the rear contact and the armature 661, the front contact and the armature 622, through the winding of the armature. The advancing magnet 660, to the battery, but due to the high value of the resistor 653, the advancing magnet 658 is prevented from functioning. Relay 620 consequently releases its armatures and at armature 621 it removes the earth which had kept relay 625 energized and this relay returns to normal. Transmitter T has now been completely restored to normal and all of its relays are de-energized.



   With relays 510 and 515 normal, the junction leads 233 and 234 of the supervisor's station are again connected to relays bOO and 505 and the latter

  <Desc / Clms Page number 55>

 are operated and maintained in the actuated position as soon as the TC-1 junction circuit is returned to normal, as will be explained. As the relay 620 of the transmitter T was brought back to normal, the earth was removed from the armature 621 which was extended by the conductor 546 and the top connecting conductor 233, the conductor 288 to the receiver. R-2 of figure 3, and then by the wiper 351, the fixed oontaot 356 towards the relay 320.

   When oelle-oi has been removed, relay 320 has de-energized and released its armatures, and at armature 323 it opens a circuit of relay slow to free 315, but before the relay fully returns to normal and closes its reinforcements 316, the earth is removed from the armature spring 321 by the conductor 284, the armature 286 and its rear contact, towards the relay 280. The relay 280 consequently de-energizes and as soon as it releases its armatures 281 and 282, it closes the blackout for relay 285 by means of connecting conductors 233 and 234. Relay 285 opens to its armatures 286 a new point in the output of relay 280 before relay 315 turns on. either completely de-energized and has placed the earth on the conductor 284 at its reinforcement 316.

   Before, however, relay 315 closes its armature 316 on its rear contact, the sounding extending through relay 305 and relay 310 in series is interrupted and these two relays return their armatures to normal. . Dono at this time, before relay 315 fully returns to normal and before he opens his armature 317 by pulling it away from its front contact, an oirouit extends from earth to armature 323 and its rear contact, by the front oontaot and the frame

  <Desc / Clms Page number 56>

 317, by the oonduuter 239, the forward contact and the armature 226 of the relay 225, by the succession oommutator 25, the trotter 215 and the brawl contact to which the conductor 00 is connected, by the forward contact and the armature 22 of the relay 20, by the resistance towards the battery.

   As a result, relay 20 is short-circuited and it returns its armatures to normal. When relay 280 disengaged, it opened its front contact by pulling it away from its frame 283, it removed the battery extending to frame 294 and conductor 289, to earth at relay 300. Consequently, the relay 300 de-energizes and brings its reinforcements back to normal. On contact with the front of the armature 302 it removes the earth extending through the conductor 238 to the digit storage relays of figure 4, which results in the release of the relays 400, 420, 465, 470 and 480 which, by releasing their frames, erase the numbers which have been displayed on the number panel.



  This action also takes place in the DS-4 duplicate panel. At armature 302, relay 300 also removes earth from conductor 238 to armature 227 and its forward contact and through the winding of relay 22b to the battery.



  This relay therefore slowly returns its armatures to normal since it is a slow release relay. After a certain time, it removes from its armature 228 the earth of its front contact which kept the relay 230 actuated and this relay, returning to normal, closes its rear contact on its armature 231. The receiver R-2 is now in its normal position, as are transmitter SN and succession switch 25 while the trunk lines 233 and 234 between the trunk relay groups TC-1 and TO-2 are brought back. to the normal position.

  <Desc / Clms Page number 57>

 



   Referring now to Figure 1, it will be remembered that relay 20 has been shorted. At its armature 24 and its front contact it removes the earth of the starter conductor 247, which opens another point of the circuit which was initially opened at the armature 301 of the relay 300.



  In contact with the rear of the armature 23, it returns the earth to the conductor 50 to mark this line as free in the succession switch SS. At armature 22 it removes the short circuit of this relay while at the front contact of armature 23 it opens its initial locking circuit and turns off lamp AL.



   The full fire warning signal 249 has now been transmitted as described in the foregoing explanation and all equipment in the district offices and at the supervisor station has been restored to normal. If at any point it is necessary to know which warning boot sent the number, the central office supervisor or district office supervisor simply counts the number of punches from the different recorders. The complete operation, from the moment of entering a warning at the fire station until the operation and release of the complete apparatus, takes place almost instantaneously, the time necessary for n any number being approximately 5 seconds.



   It will be seen that it is simply necessary to open contacts 5 at the fire boot momentarily to initiate the warning and to have the number completely registered at all district offices in the system. Full operation is fully automatic and takes place without the assistance of any operator or supervisor at the district stations or supervisor station. No attention is needed except that the supervisor should note the warning number

  <Desc / Clms Page number 58>

 which has been received and must send the necessary devices to fight the fire in that particular location. In the district office, this is done instantly immediately upon the lighting of the AL warning lamp which informs the operator of the exact position of the fire.

   The attendant should not wait for the number to be transmitted to the overseer and then relayed back to the district office and displayed on the display board, although this is done almost instantaneously. This should simply be used to check whether the number has been correctly received. In addition, this retransmission to all other district offices serves to indicate that there is a fire in the district ordered by the district office and that one must be prepared to respond to any additional warning that may be sent. to the first district.



   In some cases there may be a large fire in a district in which there are no warning boots available without having to travel a long way to reach one of them and it may be too late. in this case, the person will call the telephone operator through the normal telephone systems and this operator will relay the call to the supervisor who in turn will transmit the number of a dummy or real boot signal to the various district offices. This is usually referred to as an "idle" warning and in the present system the operator of the supervisory station has the means to transmit such a warning.

   For this purpose, the series of CD operator keys represented in FIG. 10 has been provided. These include a certain number of keys numbered from 1 to 0, an error or erasure key ER and a key start ST '. The operator receiving a warning * at rest "activates these keys in accordance with the number of a fire warning boot which may be in the vicinity.

  <Desc / Clms Page number 59>

 fire or other number that tells district offices about the particular fire situation. Setting the keys from the CD operator key series transmits the number to the DS-1 digit storage relays at his station and likewise to all district stations and places the number on the display panels. Double exposure as before.

   On receiving a call of this type, the operator's first act is to actuate the "at rest" warning key SA, figure 5. Operation of this key places earth on conductor 545 extending towards figure 10 and by winding the relay 1005 towards the battery, At its front contact and at the armature 1009, this relay is locked to the rear contact and to the earth on the armature 1021. At the front contact of armature 1007, it prepares the circuit for relay 1010. At armature 1006 earth is sent to conductor 556 to energize relay 515. This relay, while operating, moves its armatures and connects the junction conductors 233 and 234 to the transmitter T of FIG. 6. At the armature 516, the relay 515 maintains the relay 505 in its actuated position. Operation of relay 515 results in de-energization of relay 500.

   The re. lais 500 completes, at its frame 501, the circuit for the TL lamp which indicates to the supervisor that the junction line TC-2 has been taken in service. All other trunk lines will therefore have their associated lamps lit because conductor 556 is common to all circuits such as TC-2. A relay similar to relay 285 of each TC-1 junction circuit is consequently de-energized and when this relay drops out, following the de-energization of relay 515, and closes its rear contact on its armature 286, it completes the circuit from armature 286 to relay 280, through conductor 284 to the rear contact and armature 316, to earth.

   Relay 280, in ex-

  <Desc / Clms Page number 60>

 citing, close the junction conductors to the R-2 receiver of figure 3. The operator then closes the key KS which results in the ignition of the lamp KL to indicate to the supervisor that he has taken his service. series of keys to transmit a number. The operation of relay 540 also results in an acoustic indication of the use of the set of keys. At the right contact of the KS key, the earth is connected by conductor 557 in multiple by all the different keys of the CD series, which earths the two main springs of each key.

   The operator then proceeds to set the number on the CD key set by lowering the keys in accordance with the boot number of the fire alarm station and when pressing each key the number is established on the DS-1 digit storage relay group and pan. light array to serve as a control for the operator. If, for example, the first digit of the number to be transmitted is digit 2, it actuates its key 2. This results in the placement of the earth on each side of this key and of its contacts, starting from conductor 557, by two resistances indicated in 1028 and by the winding of relay 1025, towards the battery. The individual resistances in each of the four conductors prevent the earth from extending to those that are not earthed.

   On contact with the front of the armature 1027, the relay 1025 places the earth through the winding of the slow-to-operate relay 1030, towards the battery. At its front contact and at the armature 1026, it places the earth through the armature 1036 and its rear contact, by the winding of the slow release relay 1040 towards the battery. The relay 1040, while operating, closes its front contact on the armature 1039 and places the earth by the winding of the relay 1035 towards the battery; but this relay is short-circuited at the other end of its winding by the earth ve-

  <Desc / Clms Page number 61>

 nant of the frame 1026.

   At reinforcements 1041 and 1043, the relay
1040 closes a circuit from the earth to key 2, via the rear contact and armatures 1031 and 1033 of relay 1030 before the latter has time to fully energize, via conductors 770 and 772 which are 'extend to Figure 9, to the first set of S-1 digit storage relays, which results in energization of relays 800 and 820. Operation of these relays results in they are locked by means of their front contacts and armatures 801 and 821 towards the earthed conductor 558. These relays remain energized and at their other armatures they light lamp 2. When the operator removes his finger of key 2, which opens the contact of this key, relay 1025 returns its armatures to normal by removing the earth from one side of relay 1035 to armature 1026.



  This allows relay 1035 to operate and, armature 1038 and its forward contact, to lock itself to earth on armature 1021 and its rear contact. In the meantime, relay 1040 slowly released its armatures because its circuit was open at armature 1036 of relay 1035. At the forward contact of armature 1036, the circuit extending from 1 The armature 1026 of relay 1025, when closed, is transferred to the second group of relays for the second digit of the number. The relay 1030 is released in the same way and brings its reinforcements back to normal.



   The operator then presses key 4, which again energizes relay 1025, and this in turn energizes the slow-to-operate relay 1030. Relay 1025 this time closes an open circuit going from armature 1026 and from its forward contact by the armature 1036 and its forward contact, the armature 1046 and its rear contact, by the winding of the slow releasing relay 1050, towards the battery. Relay 1050 operates and closes

  <Desc / Clms Page number 62>

 its front contacts on its 1051 and 1052 frames, and the other .. very frames.

   The earth from conductor 557 is thus connected to key 4, by the armatures 1031 and 1033 and their rear contacts, the armatures 1051 and 1052 and their front contacts and by the conductors 776 and 777, which has as a result the excitation of the second group of storage number S-2. The relays 840 and 850 of this group are consequently energized and are locked to the driver 558 and in the same way to their other armatures they cause the lighting of the lamp 4.

   As soon as the operator releases key 4, relay 1025 returns to normal and at armature 1027 it opens the circuit of relay 1030 but this relay maintains its armatures for a slight interval after relay 1025 has operates relay 1050, so that ground from conductor 557 can be started to the digit store relays. When relay 1025 returns its armature 1026 to normal, it has opened the circuit of relay 1050 and it has also removed the short circuit of relay 1045. Relay 1050 releases very slowly so that it completes the circuit. from relay 1045 to armature 1049, and that this relay locks itself by armature 1048 and, at armature 1046, prepares the circuit for relay 1060.



   The operator then presses the key 9 which has the result that the earth is transmitted by the conductor 557 to both sides of the key to activate the relay 1025. The relay 1025 closes the circuit to the armature 1027 for it. relay 1030 and it activates its armatures after a slight interval. Relay 1025 closes at its forward contact and at armature 1026 a circuit through armature 1056 and its forward contact, armature 1046 and its forward contact, armature 1056 and its forward contact. rear, by winding the slow releasing relay 1060, towards the battery.

   Relay 1060 activates its arming springs.

  <Desc / Clms Page number 63>

 tures and closes its front contact on frame 1061 which results in the earth coming from key 9 being transmitted through frame 1033 and its rear contact, front contact and frame 1061 driver 782, ver. the third group of storage relays S-3 to actuate relay 860. Relay 860 operates and locks its front contact to the grounded conductor 558 and its other armatures, resulting in the lighting the lamp 9.

   When the operator releases pressure on key 9, relay 1025 de-energizes, which removes the earth from its armature 1026 so that relay 1055 is not short-circuited and energizes from earth on the 1059 armature and its front contact, through the winding of this relay and the resistance to the battery. The relay 1055, when energized, closes its locking forward contact and the 1058 armature to earth at the 1021 armature. At the 1056 armature and its rear contact, the relay circuit 1060 is open and it releases its frames. Relays 1035,1045 and 1055 therefore remain latched to armature 1021 while the remaining relays in this circuit are released at this time, N 249 is now exposed to the supervisor station.



   At any time during the establishment of these numbers, if the operator makes a mistake, he notices it by noting the number which is instantly exposed. In the event of an error, he can erase this number by lowering the error key ER. This places ground from conductor 557 on both sides of the key, through the coil of relay 1020 to the battery. Relay 1020, by energizing, removes earth from armature 1021 and its rear contact, which results in opening of the latch circuits extending to relays 1035, 1045 and 1055. and likewise towards all the digit storage relays which receive their locking earth.

  <Desc / Clms Page number 64>

 lage by conductors 558 from this rear contact.



  This completely erases the number and it can be re-established by the operator after pressing the SA key again to restart the rela.is 1005 which will also have been released.



   After the operator has entered the number satisfactorily, he activates his start key ST or ST-1, one of these keys being represented in the operator's series of keys and the other in its key panel with the other keys, This places a ground from either of these keys to conductor 554 which completes a circuit through frame 1007 and its front contact, for winding relay 1010 to the battery. Relay 1010 completes at its forward contact and at armature 1012 its locking circuit extending towards armature 1007 and its forward contact. At the forward contact and armature 1011, relay 1010 places earth on conductor 549, by winding up relay 655 of transmitter T to start operation of this transmitter.



  Earth from the ST starter key also extends through conductor 554 to the CS code transmitter of Figure 9, which results in energizing relay 930 to start transmitter operation. of code CS, the transmitter T is then actuated as explained previously, so that the wiper 665 turns on its associated fixed contacts to collect the various grounds which have been placed on the conductors 770, 772, 776, 777 and 782 by the different digit storage relays of groups S-1, S-2 and S-5.



  As we will recall, these grounds remained on these conductors as a result of the locking of these various relays from the ground on the conductor 558 and they are now transmitted by the conductor 546 from the / transmitter T, through

  <Desc / Clms Page number 65>

 junction conductor 233 of figure 5 and all other district offices, then from the junction circuit
TC-1, to receiver R-2 in figure 3, by means of rubbers 350 and 351 of R-2 in figure 3, by fixed contacts and conductors to groups of digit storage relays DS-3. Relays 400 and 420 of relay group S-4, relays 465 and 470 of group S-5 and relay 480 of group S-6 are thus energized and latched by their own contacts fixed to conductor 238.

   These relays activate their other armatures and expose the N 249 as in the first case.



   The CS code transmitter of FIG. 9 is actuated as explained previously, in that it rotates its wipers on the fixed contacts to collect the different grounds of the conductors extending towards them. DS-1 digit storage relay and translates them into numerical digits suitable for actuation of the PR printer recorder at the supervisor post, and likewise by junction conductor 456 to the office district and to all other district offices in a similar fashion.

   After the complete number has been transmitted, the apparatus is fully returned to normal, as previously explained, with relay 1020 of Figure 10 and relay 300 of Figure 3 possibly being actuated to produce the opening of the latch circuits for the various digit storage relays and the completion of the release of the apparatus associated with this connection.



   Note that for this type of connection it was not necessary to operate the SS succession switch because no fire warning boot was activated. It was also not necessary to activate the finder F in figure 6 because no trunking line search was necessary, even though the R-1 receptor in figure 7

  <Desc / Clms Page number 66>

 was not actuated-- either. The equipment is now ready to receive another fire warning signal.



   In some cases, warnings may be received on the display panel at the supervisor post and the operator at that post may for some reason wish to withhold the transmission of the signal from the actuated warning boot to district offices. In this case it remains exposed on its panel of lamps until the moment when the operator wishes to release it. In this case, the operator first activates his automatic transmission key AT, which places the earth at a contact through the lamp AU, which results in the lighting of this lamp to indicate so. visible to the operator that he has activated this key and that all fire signals will be retained at his post. The operation of this key likewise opens the normal closed contacts 560.

   This opens a point in the circuit extending through conductor 547 to relay 710 and armature 721 of receiver R1, which prevents transmission of earth from the fixed contact of the wiper 760 to the contact 560 of the transmission key. automatic AT and by the driver 554 to the relay 1010, which relay prepares, as we will remember, the operation of the transmitter T. The starting circuit of the CS code transmitter, extending through the driver 554, n ' is also not completed and the code transmitter therefore does not function. As a result, the transmitter E is not actuated when a fire warning signal is received and does not transmit the number of a fire alarm box if a number has been established on the DS-1 digit storage relay at the supervisor's station.

   The T transmitter, CS code transmitter and SN transmitter and DS-3 digit storage relays are not actuated and the transmitted number therefore remains on the lamp panel until it is cleared by the operator, which happens when this

  <Desc / Clms Page number 67>

 last returns the automatic transmission key AT to normal by closing the circuit through receiver R-1 to transmitter T and producing full operation of the equi. pement, as explained.



   Referring now to Figure 1, it will be recalled that line conductors 2 and 3 extending from the FS-249 fire station to the district station include a closed circuit loop, enclosing relays 30 and 40 which are kept energized in series by these conductors, and that the normally closed contacts 5 of the fire station are bypassed with resistor 6. When sending a warning, these contacts 5 are momentarily cut, which results in the introduction of the high resistance 6 of the line and the de-energization of the relay 40 which transmits the warning and produces the warning signal AL, characteristic of this particular line.

   In the event that now the line conductor 2 is accidentally grounded, short-circuited with 3 or is open, the relay 30 releases and returns its armatures to normal. Furthermore, at the fire warning boot, the relay 7 which is normally kept energized in series with these relays, likewise brings its armature 8 back to its rear contact, which closes a circuit extending from the earth. by the contacts 4 the armature 8 and its rear contact, the conductor 3, by the winding of the relay 40 towards the battery.



  Relay 40 therefore remains energized while relay 30 drops. At its front contact and at armature 32, relay 30 opens a point in the circuit of relay 20 to prevent this relay from energizing. At rear contact and at armature 31, it places earth through the TL fault lamp to the battery. If this light comes on, it tells a district office worker that there is a problem on the line and needs to be addressed. When the fault has been dealt with, the relays

  <Desc / Clms Page number 68>

 30 and 7 are energized again and return the circuits to their normal state.



   If conductor 3 is earthed, shorted to 2, or open, both relays 30 and 7 drop out and the circuit operations are the same as for the fault on conductor 2, except that in the case of where conductor 3 is open, the warning lamp lights up as well as the fault lamp. This has no consequence, however, since with relay 30 being back, no warning can be transmitted. In addition, with the fault lamp on, this indicates to the attendant that the warning lamp is giving a false signal.



   The trunk conductors extending from all district offices to the supervisory office are likewise arranged in such a way that they are continuously monitored.



  In the event that these lines are open or grounded, there is an indication of this condition at the district office and supervisor post. Supervisor station relays 500 and 505 and district office relay 285 are all energized in series with each other and in the event of a break in this trunk line, relay 285 drops out and , on its contact of ar- laugh and at armature 287, it closes a circuit extending to the TCL lamp, to the battery, If no number is transmitted by the trunk line to the district office from from the supervisor position, the attendant knows that this is the indication for him of an open line.

   At the supervisor's station, relay 500 closes by dropping its earth at armature 501 on its rear contact, and completes a circuit through lamp TL and then through relay 540 to the battery. The lighting of this lamp and the closing of the armature of the relay 540 to complete the circuit through the horn B serves to indicate to the supervisor, after he has waited an interval to see if there is a transmitted number, that there is a fault on the junction line extending

  <Desc / Clms Page number 69>

 to the district office. When the fault has been repaired, relays 500, 505 and 285 again energize in series with each other and interrupt circuits passing through their associated lamps.



   In the event that one of the sides of conductors 233 and
234 becomes permanently earthed, relay 500 drops out on its own and closes the circuit to the TL lamp. Relay 285 may or may not drop to close the circuit to the TCL lamp, depending on which jumper has been accidentally grounded.



   Should the attendant or someone else accidentally move the SN transmitter wipers 270, 271 and 272 and place them on their first set of fixed contacts, this usually puts the switch out of the way. its position, so that it would not work properly. To avoid this situation, when the wiper 271 goes to its first fixed contact, the earth is connected from the grounded arm 221 and from the fixed contact of the relay 220, through the first. fixed contact on which the wiper 271 rests, by this wiper and the winding of the relay 225 towards the battery.



  At its armature 258, it closes a circuit by winding the relay 250 towards the battery to energize this relay which actuates its armatures 251, 252 and 253 to prevent this switch from being actuated at this moment under the effect of a fire warning signal. Relay 255, when operating, closes its front contact on its armature 257 and also its front contact on armature 259, which plots a circuit extending from earth to armature 221 through the fixed contacts , the wiper 271, the front contact and the armature 257, the armature 261 and its rear contact, the front contact and the armature 259, by the winding of the magnet of rotary advancement 260 towards the battery.



  This magnet energizes and at its rear contact and at the frame

  <Desc / Clms Page number 70>

 261, it interrupts its own circuit and in falling again closes its excitation circuit. The wipers are therefore moved towards the had on their fixed contacts. When the wiper 271 reaches the fixed contact 274, it receives the earth directly from the fixed earthed contacts which are connected in multiple and the switch continues to advance. When the friction 271 reaches the fixed contact 276, the earth is received from the armature 232 and its rear contact, by the armature 222 and its rear contact, the front contact and the rear contact. 'armature 258, towards the fixed contact 276.

   As the wiper 272 is now in front of its first fixed contact, the wipers again rotate on their fixed contacts as before. When the wiper 272 reaches the fixed contact 275, the earth coming from this wiper extends to the armature 254 and its front contact, to the winding of the relay 225 and to the battery. This relay, while operating, closes to the armature 226 the circuit of the relay 236 which removes the earth to the armature 232 of the fixed contact 276. The wiper 271, on reaching the contact 276? permanently opens the circuit of relay 255 and this relay returns all other relays to normal at its armatures and the switch is now in the normal position.



  * A similar action occurs when the rubbers 350, 351, 352, and 353 of the R-2 receiver of Figure 3 are accidentally moved from their normal position and brought onto their first set of stationary contacts. This completes a circuit extending from the earth on the armature 302 and its rear contact, through the wiper 352 and its first fixed contact which is connected in multiple by all the remaining contacts to the fixed contact 354, then by the winding of the slow release relay 335 towards the battery. This relay is energized and with its earthed armature 337 and its front contact, it completes a circuit by winding the relay 330 towards the battery.

   This relay,

  <Desc / Clms Page number 71>

 when excited, opens its frames 331 and 332 by moving them away from their rear contact to prevent a warning signal from controlling the switch. The relay 335, at its front contact and at the armature 338, extends the ground of the trotter 352 by the rear contact and the armature 341, by the winding of the advancing magnet 340, towards the battery. This magnet energizes and opens its own circuit at its rear contact and armature 341, and returning to normal, it advances the switch wipers to the next set of contacts. This action continues until the wiper 352 reaches the fixed contact 354, the earth then being collected on the fixed earthed contacts, instead of being taken to the armature 302.

   When the wiper 352 reaches its last fixed contact, the earth is no longer supplied by the wiper 352 and the relay 355 is de-energized, which opens the circuit of the advancing magnet 340 which, in releasing, causes the wipers to advance in front of their first series of fixed contacts. At this moment, the float 353 is put in position on its first fixed contact and the earth coming from the armature 302 extends this wiper 353 to again energize the relay 335 which in turn energizes the relay 340, and the advancement action continues once again.

   After the Trotter 353 has reached its last fixed contact and the friction 352 is in positive. opposite its first fixed contact, the circuit via relay 335 is no longer complete and it returns its armatures to normal and in turn balances the advancing magnet 340.

   The switch ect is maintained in its normal position, ready to receive a warning box signal, and it is in the position it occupied before being accidentally moved,
In the receiver R-1 of figure 7, a similar action takes place when the wipers are accidentally placed in position on their first series of fixed contacts and one

  <Desc / Clms Page number 72>

 immediately sees how this happens as the circuitry is quite similar to the R-2 receiver in Figure 3.

   The relay 720 energizes the advancing magnet 750 and the latter in turn causes the wipers to turn to return to their normal position; at this time, relay 720 drops out and permanently opens the circuit for the feed magnet 750.



   In the event that the transmitter T has its wipers accidentally moved, they are put in position on their first series of fixed contacts and the wiper 666 receives the earth from its first fixed contact which is connected in multiple with other very earth contacts on armature 656 and its rear contact. A circuit is then completed, extending from wiper 666 through the winding of slow release relay 620, to the battery. Relay 620, when operating, closes a circuit for relay 625 from grounded armature 621 and its front contact. Relay 625 activates its armature 626 and at armatures 627 and 629 it prevents interference in the rotation of this switch if a warning occurs at this time.



  The armature 626 completes a circuit from the fixed contact earthed, by the wiper 666, pax the forward contact and the armature 626, the rear contact and the armature 661, the contact of front and armature 622, by winding feed magnet 660, to the battery. When magnet 660 energizes, it opens its own circuit to its armature 661 and by falling each time, it advances the wipers in the forward direction. When the slider 666 is rotated towards its fixed contact 669, there is an earth on this fixed contact extending from the earth on the frame 621 and its front contact, through the frame 646 and its rear contact, the rear contact and the armature 657, towards the fixed contact 669;

   therefore, the circuit to relay 620 remains complete and the advancing magnet is energized again and continues to advance the slider 666

  <Desc / Clms Page number 73>

 again on its grounded fixed contacta. During this second rotation, however, the wiper 667 has reached its fixed earthed contacts which are in the last half of its row and it places this earth through the wiper 667, the armature 623 and its front contact. , pax the winding of relay 645 towards the battery. At the armature 646, it opens its rear contact, which interrupts the circuit which extended from the earth on the armature 621, up to the fixed contact 669. Consequently, when the wiper 666 reaches its fixed contact 669, the earth is no longer on this conductor and the relay 620 consequently de-energizes.

   On falling, it opens its relay circuit 645 at armature 623. The switch is therefore in its normal position once again, ready to receive the number of an activated warning boot.



   When the CS code transmitter has its wipers 990 to 994 accidentally moved and put on their first set of fixed contacts the earth is supplied from the first fixed contact to the wiper 994 by this wiper to the rear contact of the armature 932, by winding relay 940 towards the battery. This relay is therefore energized and at its armature 943 and its vent contact, it extends the earth from all the fixed contacts connected in multiple to the rear contact and armature 981 , by winding the feed magnet 980, towards the battery.



  The wipers are therefore automatically rotated on their fixed contacts. At its front contact and at armature 942, relay 940 rents locked to these fixed earthed contacts. When the baby walker 994 reaches the fixed contact 998, it receives ground from the rear contact and the armature 933 to advance the switch again. This same action is repeated when the trotter reaches its fixed contact 983, and after this, the wiper 995 takes the place of the wiper 994. When the wiper 995 reaches its fixed contact 988, the circuit is completed.

  <Desc / Clms Page number 74>

 tee by armature 931 and when fixed contact 989 is reached, it receives earth from armature 933.

   On the last fixed contact, the wiper 995 opens the circuit of the relay 940 and the switch is again to normal. As the seeker switch F and the succession switch SS have their wipers placed on the last stationary contacts used, it is not necessary to bring them back when they are accidentally moved, because they have no normal position.



   The foregoing description has set out the situation which arises when an ordinary fire warning call is made. In some cases, it may be desirable to establish in connection with the fire warning system, a telephone communication between the fire alarm station and the district office, or between the district office and the district office. the central supervisor's office, cu from the fire alarm station directly to the supervisor's post.



  In this case, appropriate measures are taken so that the normal line connecting each warning boot to the district station can be used for the purpose of telephoning. Between the district office and the supervisory office, on the contrary, separate telephone trunk lines are provided in addition to the signal trunk lines through which fire calls are transmitted and received. Each fire alarm station, for example FS-249, has a standard telephone jack marked J.

   Any district office that has responded to a warning in the vicinity of that fire station can therefore call the district office or the chief supervisor in the event that additional devices are required when is not in a condition to fight the fire.



  For this purpose, each fireman's machine or part of fire-fighting apparatus is provided with a portable telephone set, comprising the usual receiver and transmitter and a

  <Desc / Clms Page number 75>

 magneto generator to provide ringing current.



   A few dry elements provide the conversation battery.



   The circuit of the fire station is arranged in such a way that when the plug of the portable telephone is inserted into the jack J, it switches off the fire signaling device. The line to the two relays 30 and 40 which are normally energized and which likewise control the operation of the signal associated with this fire station is constantly open.

   The telephone line terminates at the district office at the repeater coil RE, by means of a pair of capacitors, and is so arranged that it is accessible to the district station for an attendant, as So are all the other fire station lines which are connected in multiple to RE. The other side of the RE repeat coil extends to the trunk line, going to the supervisor's station, where appropriate measures are taken so that the supervisor can stand on this trunk line and can also receive a signal from any of the fire stations.



   A detailed description of an ordinary telephone call will now be given with reference to Figures 1, 2 and 5. To produce a telephone call by means of the fire alarm line, the firefighter brings up his TV. portable telephone to a position very close to the fire station, eg FS-249. He inserts the telephone plug into jack J, which opens contacts 4 and 9 to switch off the other equipment and extend conductors 2 and 3 to the portable telephone in series with a capacitor which is placed in the mobile phone. Opening contacts 4 and 9 isolates relay 7, bypass resistor 6, and fire warning springs 5 from the telephone circuit.

   The introduction of the portable telephone capacitor between

  <Desc / Clms Page number 76>

 junction conductors 2 and 3 allow relays 30 and 40 to be de-energized. At the rear contact and at the armature 31, the relay 40 completes the circuit for the fault lamp TL.



  At the rear contact and at the armature 41, the relay 40 completes the circuit for the warning lamp AL. The operation and lighting of these two lamps which are unique to that particular fire station inform the district station attendant that a telephone call is about to occur to the supervisor station. . At the forward contact and armature 32, the circuit of relay 20 is prevented from being completed so that no fire warning signal equipment is activated. The armatures 33 and 43 now rest on their rear contacts and the circuit is extended by the conductors 70 and 71 to the repeater coil RE.

   The firefighter was on the cell phone then activates the hand generator, which transmits an alternating ringing current through conductors 2 and 3, armatures 33 and 43 and their rear contacts, conductors 70 and 71, through the right winding of the RE repeater coil and the capacitor, then inductively to the left winding of the RE repeater coil, the junction conductors 228 and 229 extending from the district office to the supervisor station, then through armature 526 and its rear contact, bell condenser 522, upper coil of relay 520, rear contact and armature 528 and return via conductor 229.

   This ringing current therefore actuates the ringing relay 520 which, when energized, closes a locking circuit for itself by its lower winding, circuit extending from its front contact and armature 521 towards the end. frame 527 and its rear contact, towards the earth. A branch of this relay 520 latching circuit extends from earth on armature 527, through armature 521 and its front contact, through the TE lamp to the battery at relay 540. The re -

  <Desc / Clms Page number 77>

 But 540, while getting excited, actuates horn B to acoustically inform the supervisor of what is happening on the junction line. Lighting of the TE lamp informs the supervisor of the particular trunk line from which this call is received.

   By responding to the ignition of the lamp TE, the monitoring activates the response key AN which closes the earth on this key and its contacts, by winding the relay 525, towards the battery. While operating, relay 525 opens its rear contact of its armature 527 which results in de-energization of relay 520 and extinction of lamp TE.

   At its forward contacts and at frames 526 and 528, relay 525 connects the trunk line to the OT operator telephone circuit enclosing battery supply relay 560 which supplies the talk current, and the operator can therefore get in on 8. a conversation with the fire-fighter at the fire station and be warned by him of what is happening in a particular fire and of the need to send additional devices.

   Relay 525 then operated and opened its rear contacts of its armatures, relay 530 was de-energized which resulted, at its armature 531, lighting up the signal lamp SL-1 which informed the The operator at this time that this trunk line is in service and that it is connected to it. The TE lamp was extinguished, as will be recalled, when the operator answered the call. At the district station, relay 262 drops off and, at armature 263, closes the circuit by the lamp SL which informs the attendant of a telephone call arriving via this trunk line.



   When the conversation is completed, relays 30 and 40 are energized again in series with each other via lines 2 and 3 and at the same time relays 530 and 262 are energized in series. These latter relays being normally energized, keep their armatures actuated so that in the event that the

  <Desc / Clms Page number 78>

 junction line 228 and 229 extending between the district station and the supervisor station became open at any time or grounded on one side or bypassed, the attendants at the supervisor's station or at the district station are warned of this insto @ tunement following the lighting of the lamp Sl or the lamp SL1.



   It can be seen from the above that a new type of fire warning system has thus been established in which there is only one station per line and in which only one station among several stations which have been activated at the same time. .. me time or one after the other acts to activate the equipment to transmit the warning signal.



  Subsequent stations have their signals stored on their associated relays (for example relay 20 of the RG group) which are unique to each fire station, such that when a signal is completed and initiated the next signal enters. in action immediately following its position in the row of fixed contacts of the SS succession switch. As will be remembered, this switch is a switch in which the wipers remain on the series of contacts which are used last.

   As this SS succession switch has only been shown to have lines connected to 12 fire stations and those that are not connected are grounded, understand that the number of lines may be increased. to any extent by the simple addition of several contacts to the fixed contact rows of the switch.

     Likewise, seeker switch F may have access to any number of trunk lines to district offices, beyond the number shown,
Although the invention has been shown used in combination with a fire alarm system, it goes without saying that it could also be used well for other signaling systems, for example watchmen services, signals. police and surveillance signals,


    

Claims (1)

CLAIMS: EMI79.1 ¯ ¯ .. ¯ .... ¯., - ¯ .. - ¯ ¯ I.- A fire warning system employing a district station to which are associated a number of fire warning boots, and a central station with which the district station is connected, through which during operation from a fire warning box, a signal characteristic thereof is transmitted from the corresponding district station to the central station and is relayed from there to the district station. 2. - A fire warning system employing a number of associated district stations ohaoune a number of fire warning boxes, and a central station to which each of the district stations is directly connected, in which, in the operation of a fire warning box, a signal characterizing it is transmitted from the district station to the central station, and from the central station to each of the district stations . 3.- A fire warning system employing a district station to which are associated a number of fire warning boxes, and a central station to which the district station is connected, in which, when operation of a fire warning box, a signal characteristic of oelle-oi is transmitted in code from the associated district station to the central station and is then transmitted from the central station to the district station, in the same code to provide temporary registration, and in a different code to provide permanent registration. 4.- A signaling system for transmitting $ numbers in code via a two-conductor junction line, <Desc / Clms Page number 80> .in which a rotary switch at the receiving end is actuated, in synchronism with a similar switch at the transmitting end, by current pulses transmitted in the line, and is intended to supplement, in each operating position, a circuit passing through the line for a storage relay, the activated or unactuated state nature of a number of storage relays serving to determine the nature of the received signal. o.- A signaling system for transmitting numbers in code through a two-conductor trunk line, in which a rotary switch is provided at each end of the line and the switch at the receiving end is moved, in synchronism with the switch at the transmitting end, by current pulses initiated by a conductor of the line while one or more relays of a series of storage relays at the receiving end are intended to be actuated in a circuit comprising a wiper of each switch and the other conductor of the line. 6. A fire warning system according to claim 1, 2 or 3, wherein upon completion of transmission from the central station, the equipment operated at the district station is released. 7.6 A fire warning system according to claim 1, 2 or 3, wherein the signal is transmitted through the line twice to activate two independent sets of indicator devices. 8. A fire warning system according to claim 1, 2 or 3, wherein the transmission of a signal from a district station to the central station is effected by means of a switch. common line which is intended <Desc / Clms Page number 81> born to be associated, by means of an oheroheur oommutateur, with devices corresponding to an actuated warning box. 9. A fire warning system according to claim 1, 2 or 3, wherein the transmission of signals between the district station and the central station is effected in the same code in both directions. 10. A fire warning system according to claim 1, 2 or 3, wherein each fire alarm boot is connected to its district station by means of a two-conductor line and the operation of the fire alarm system. the bopite o consists of the momentary introduction of a high resistance in the bouole channel to produce the de-energization of a relay of a pair of normally exerted relays at the district station. 11. A fire warning system according to claim 10, wherein a break occurs in the loop, a normally energized relay in the box de-energizes to connect the earth in order to bypass a normally operated fault relay. , at the district station. 12. A fire warning system according to claim 1, 2, 3, 4 or 5, wherein the commencement of the transmitting operation is effected by a signal initiated from the receiving end. 13. A fire warning system according to claim 3, wherein the temporary recording consists of the lighting of suitable lamps. 14. - A fire warning system according to claim 3, in which the permanent recording includes the punching of holes in a tape. lb.- A fire warning system according to claim 3, wherein the signal for effecting the signal <Desc / Clms Page number 82> Permanent registration consists of trains of pulses which are initiated by means of a single wire to the district station. 16. A fire warning system according to claim 2 or 3, wherein a single series of receiving apparatus in the central station is adapted to respond to signals from any of the stations. - district stations which are automatically associated with the receiving device by means of a finger switch. 17. A fire warning system according to claim 1, 2 or 3, in which during the transmission of signals to and from the central station, a signaling device associated with the bot- you actuated is a contact. 18.- A signaling system according to claim 4 or 5, in which four storage relays are provided for each digit, where each relay corresponds to a particular position of the rotary switches. 19. A fire warning system according to any one of the preceding claims, wherein the central station is provided with a series of keys by means of which signals relating to fire calls received at the station independently of the signals. Warning boots are intended to be transmitted simultaneously to the various district stations, by means of the equipment and by the lines used for the automatic transmission of fire calls. 20.- A fire warning system, in substance as described and shown in the accompanying drawings.