US1431116A - Semiautomatic telephone system - Google Patents

Semiautomatic telephone system Download PDF

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Publication number
US1431116A
US1431116A US268069A US26806918A US1431116A US 1431116 A US1431116 A US 1431116A US 268069 A US268069 A US 268069A US 26806918 A US26806918 A US 26806918A US 1431116 A US1431116 A US 1431116A
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group
contact
switches
circuit
line
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US268069A
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Hultman Carl Axel Wilhelm
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker

Definitions

  • Patented Oct 1922 0. A. w HULTMAN.
  • This inventlon relates to automatic and semiautomatic telephone systems in which switches or great capacity, for instance one or more thousand lines, are used for establishing the talking connections. More particularly, the invention relates to the group-switching stages of systems of this kind in which the connections are established by means of switches of the line finder type associated with the outgoing lines of a group-switching stage, while the numerical selection is effected by means of separate group selectors or equivalent means associated with the incoming lines and arranged in common to groups lines.
  • the principal object of the invention is to simplify the switch operations in the group-switching stages oi such systems oarticularly with a View to prevent wrong connections.
  • the fixed contacts of each finder switch are arranged in groups or rows each comprising theterminals of a dilterent group of incoming lines.
  • This grouping of the incoming lines and the terminals of the finder switches lends itself conveniently to obtaining a simple control system, so as to prevent interference in case there are two or more simultaneous calls into different numerical groups. in such a case finder switches belonging to different numerical. groups would he simultaneously searching for the calling l nes, there would be a risk of the calling line be ing connected through to a wrong numerical group. To prevent this the group selectors are adapted, according to the invention, to mark the appertaining group out incoming lines only in the finder switches helonging to the numerical, group selected.
  • each group of incoming lines is provided with separate test-contacts SYSTEM.
  • Fi ures 14' show the circuit diagrams for a talking conue tion in a semiautomatic telephone exrl er 'ording to the invention, adapted to; a nun of subscribers corresponding to numbers with five digits,
  • Figure 8 is a scheinatical view of the drivinn device 01 the line finders
  • Figure 10 shows a detail of the construction of the register switches
  • Figure ll shows schematimlly the arrangeinent of the junctions and the connectingz; switches in an exchange according to Figures l7,
  • Figure shows diagrammatically a cross ob ii, and shown as consisting of single wires although, actu ll they aomprise two or more in Fl ll tne subscribers lines AL are connected at the ricorn fr side of the 1.: exchange to the contact fielv s of preseiecting line lind t utgo side to the s. and at he 0 s contac d of coi'inector L V. Elie connections betwe n the pres-looting line iinders nd the connectors ll!
  • the connectors is diii'erent from that oi? the preselecting line finders and the group selectors comprisl switches 5 and bi chiefly, and only '11 the trunk lines leading from the latter and connecting the subscribers lines are divided. in four bundles. the contact arms being normally arranged centrally with re gard to these bundles and adapted to be set to one or the other side from the normal position.
  • Each bundle comprises Vertical rows of 20 lines each.
  • a ociated with each group of ten lines of the trunks Fil is a set of registers com mon to all of said lines and comprising five machine driven register switches SO L, BO S0 S0 wh ch correspond to difrerent digits of the subscribers numbers and which are set in accordance with the Wanted number either from the subscribers station in full automatic systems or from the keyboard in semiautomatic systems.
  • the re ister et also comprises a machine driven group selector RV and three electromagnetically dryen register switches ltlfl RE and BT13 iior controlling the setting of the connector.
  • the sWitc-hir operaion is principally the following.
  • Upc i a call a plurality of preselecting line 7 i oers b. are started simulneously the said iinders then moving forl and backwards in horizontal direcwhile making contact with test Wires 3 he diierent vertical rows of contacts.
  • oreselecting line finder which first finds cical rowcontaining the line Oil the calling subscriber, is stopped in its horizontal moveitfient and is immediately ai terstartr ed iut wards or downwards, the latter movement ceasing when the contact arms make contact with the calling line.
  • the group selector has as many contact positions as there are 2-thousands groups of subscribers lines, and these contacts are con nected to test wires s s 8 etc, of groups of S 6 S G. B G etc, of group selectors 8, corresponding to the different 2-thousands
  • the group selector has as many contact positions as there are EZ-thousands groups of subscribers lines, and is provided with con tacts connected to test wires s s 5 etc. of different numerical groups S G e3 6,, S G etc, of junction finders 8, corresponding to the different 2-thousands.
  • test wires identify that vertical row of the finders which contains the calling trunk FL and are therefore located immediately below one and the same row the wires of which extend through a plurality of groups of switches S
  • the identification is effected by a potential being applied to one of said test wires, viz that one which extends through the switches of the numerical group 5 G selected.
  • another group of trunk lines FL, connected to another vertical row is identified by another set of test wires s 8. etc., connected to the contacts of another group selector, viz that one associated with said other group of trunk lines.
  • the selection and starting of the numerical group of selector switches S in question is effected by means of the same group selector RV but over contacts and circuits not shown in Fig ure 11.
  • the corresponding set of group selectors S is started and connection is established between the calling trunk FL, and one of said group selectors in the same way as in the pre-selecting section. Wrong connections which might occur, in case several calls are made simultaneously in the same marked vertical row of the contact field of the group selectors S are prevented by all lines of a vertical row being marked as engaged, as soon as a call occurs on one of them. This is effected as soon as a lead of the trunk F L; is taken into engagement by the alling subscriber when not only this particular lead, but also all other leads of the same group 8 G or S G.
  • the invention is, of course, not limited to the use of only one group switching section, if for instance the dii'lerent groups of subscribers are distributed on different exthe invention that in changes, it may be necessary to arrange a first group switching section on one exchange and a second group switching section on another e..-:change. it is only essential to such cases one or the other or both group switching sections equipped for multi-digit group selection, i. e. that each section :torms a combination of two or more single dig; switching sections, the connection being effected in one step without intervening numerical selection, in which case the latter precedes the connection.
  • the invention does not exclude the use of double line finders according to the principle of double preelection, and this arrangement may in this case be applied to the group selecting section as well as to the preselecting section.
  • the particular group selector may, of course, be dispensed with, it instead of it the register switches 50 and Sidare so devised that the group in question is marked directly by the setting oi the said register switches. Even the latter well as the switches SU 50 and son, may be dispensed with it the marking of the test wires s s and the contacts of the switches RE is effected .directly from a keyboard.
  • said line finders may be divided in smaller groups in which case, for the purpose of preventing interference in case two or more calls occur simultaneously in the same vertical row of the group selectors S and arrangement according to Fig. 13 may be user.
  • Each group of ten preselecting line finders it, corresponding to a vertical row in the group selector S is divided in three sub-groups, viz two groups UG, and UG each containing three selectors, and one group if comprising four sele :tors, each of said groups having allotted to it a set of registers of which. only the group selectors RV,, RV and ill are shown. Upon a call only those preseleeting line finders S belonging to the corresponding sub-group, are marked. as engaged.
  • the group selectors S are each provioed witlrtwo contact bars KS, and KS, wiich. for the purpose of illustrating their function, are shown in the drawing as provided at one side of the contact field oi?
  • the contact bar K3 is ofa height corresponding to the three ,iirst lines of: the contact field, and the her K53 is of aheight corresponding to the sir: first lines.
  • the corresponding group selector marks the test wire .3 as well as the contact bar KS whereby the group selector caused to pass the three lirst lines of the vertical row and to search only among the other lines.
  • the contact bar KS is marked in a similar manner, whereby the group selector is caused to search only in the third group.
  • the invention is not limited to the use of selecting switches of the kind above described and does not exclude the use of switches connected to the incoming instead of to the outgoing lines or trunks of the group switching section.
  • the movable contact wipers 7:: are provided at the upper and the lower ends of a contact carrier KB, which is guided between rollers B on carriage V, the latter being in turn guided. in a horizontal direction on a beam VB by means of rollers R
  • the contact carrier KB is carried by an endless cord or rope L fastened to a laterally projecting arm LA.
  • the cord or rope is carried. round two rope pulleys LS, and
  • the cord or rope runs from the pulley LS, over the pulley LS, and further over the pulleys LS LS, and L back to L5,.
  • the pulley LS is keyed to a shaft DA, which by means of electromagnetic clutches NTK, and MK, ( Figures 1 and 5) may be coupled to a.
  • the magnet last mentioned is energized simultaneously with the clutch MK or MK, respectively the swing- I magnet VB is attracted to the beam VB, the carriage being then locked and the contact carrier released. The latter will therefore be moved upwards, if the clutch MK, is operated, or downwards. if the clutch MK, is operated.
  • FIG. 1 shows diagrammatically the principal parts of the preselecting line finder S, and the appertaining circuits.
  • the circuit diagram for this line finder is the same as for the group selector S the complete diagram of which is shown in Fig. 5, and whirh is identical with and operates in the same way as the line finder S
  • the subscribers telephone T has its conductors a, 6 connected to the wires A forming the contact field of the preselecting line finders.
  • the contact field also contains two wires 0 and (Z, which together with the wires (0 and 5 form a bundle so arranged that the wipers ia,, 70 and is, mounted on the contact carrier make contact with the wires a, b, 0 and (Z respectively, when the wipers enter between the wires in the contact field.
  • the movements of the preselecting line finders are controlled by a machine driven sequence switch SO of any known construction, the contacts of which are designated 0,, G etc.
  • the figures shown close to the contact indicate the positions of the sequence switch in which the corresponding contact is closed.
  • FIGs 2, 3 and 1 show the arrangement at the operators position. Allotted to each operators position is a keyboard TB, Figure 8. and three sets of registers provided with three groups I, II, III of bus-bars 1-12, through which the three corresponding groups of leads of the trunks FL. can be connected to the corresponding switch of the registers. Only that one of the sets of registers which belongs to the group III, is shown in the drawing.
  • Each set of registers comprises five machine driven register switches SO SO (only three of which are shown, Figure l) which correspond to the digit of the subscribers numbers, and a register switch SO 7, SO SO and S0 respectively for each of the other digits. Further, there are three electromagnetic register switches RE RE and RE for controlling the setting of the connector, and a register switch SO for controlling the switching operations.
  • the machine driven register switches are of the kind which are coupled to a permanently rotating shaft by means of a magnetic clutch and which are provided with contacts which are broken and closed in different positions of the switch.
  • the set of contacts belonging to the different register switches are designated E,, E E F, X, Y, Z and the various contacts are closed in the ably mounted positions indicated by the figures.
  • the construction ot the clectro-magnetical register switches a 'ipears from Figure 10.
  • Loosely mounted on a con'unon shailt RA are three toothed segn'ients TS, (only one being shown). the san'ie being artuated in one direction by a spring til it ratchet pm.
  • SH actuated by a spring engages the toothed se ment and is operated by the armature ot the electromagnet of the register switch in such a manner that the segment is moved for the distance ol a tooth for each current impulse through the clectromagnot.
  • Figure shows the group selector 95 On the horizontally movable carriage a number of contact wipers KF -KF are provided, which during the movemei'it of the carriage make contact with a corresponding number oft stationary contact bars its ns Prorided on the carriage are, further, three contact bars KS .JIU and ili tfi cooperating with contact wipers i i F lull and Kl? respectirely nursing with the contact carrier Kl Fig. h.
  • the carriage also carri s two test wipers liil and iiIF wh ch during the movement of the finder in thehorizontal direction make contact with test wires i: for testing the diliirent rows oi contacts
  • the movements of the group selector are controlled by a sequence switch SO the contacts of which are designated etc.
  • lligures 6 and '7 show the arrangements at the conncctcn'.
  • the contact field here divided in tour groups A, U, l) and the contact carrier normally takes up a position centrally with respect to said groups.
  • the starting of the connector LY to the lcit or to the right, upwards or downwards is controllcd, as in the finder switches hy means of two elcctrouiagnctical clutches "K and Mli Figure 6, and the shifting magnet Vli Fig. 7, mounted on the carriage.
  • the switching operation is also controlled by se quence switches SO SO 80 Figure 6, and the ringing is controlled by a rotating switch S0 Pig. 1'', the contacts of said switcl'ics SO SU and SU being desig nated H to H V to V and K to K respectively.
  • the connector is provided with tour sta- Lion; 1 contact bars KS liifil litand which make contact with f our con t ct wipers liil llF lil and Ki cs cs respectively provided on the carriage.
  • the carriage also carries two contact bars KS and. K8 co-operating with two con tact wipers Ki and Kl moving with the contact carrier,
  • the contact bar KS is permanently in contact with the contact har KS by means oi? a wiper ii h Keyed to the driving shatt DA.
  • the connector are two impulse disks J S and JS from which impulses are set out for controlling the setting of the connector, and the centering disk Ct "for controlling the adjustment oi? the movable contacts in the proper position.
  • the switch arms are shown in positions corresponding to the subscribers number 8883?.
  • the switches SU 80 and 550 are set in their ninth positions (the first position corresponding to the figure 0) whereas SQ; is set in its fourth and in its eighth position.
  • the contacts F X and Y control the circuits tor setting the connector.
  • the numerical wiring oi the connector will appear from the numbers inserted in the vertical contact rows of the connector field diagrammatically represented at the bottom of Figure
  • the connector is connected to the registers over the trunk lines a, b, (i.
  • the clutch MII couples the connector for movement to the left and upwards and the is indicated hy clutch MK for movement to the right and downwards.
  • the circuits of these clutches are controlled by relays SR and SR operated over the (Z- and Z)wire respectively.
  • the sequence switch D is then moved into its third position in which the circuit of the relays Fit of the Q-thousand groups of trunk line finders selected is closed over a contact F said trunk line finders being thereby started to hunt for the line engaged by the calling subscriber.
  • One of said line finders establishes the connection and the appertaining connector is thus connected to said line and over that one to the registers through contacts C (J C of the sequence switch (1 which is now in its sixth position.
  • the connector is now to be set in accordance with the positions taken up by the register switches SO SO and SO Thus, determines partly (at contacts X if the connector shall be started to the left (even hundreds) or to the right (odd hundreds) partly (at contacts X in which hundreds the switching operation shall take place. SO then determines (at contacts Y which group of 20 subscribers, i. e. which contact row, the connector shall have to search for, and SO (at contacts Z togethe with SO (at contacts Y finally determine the subscriber in question to be searched for. SO also determines (at contacts F whether the connector, after having been set in the horizontal direction, shall move up-.
  • the wanted number is 88837 as presumed above one connector is selected, as previously described, out of those containing the subscribers lines within the 88th and 89th thousands.
  • This connector will then send out four impulses on the a wire, before the last hundreds to the left is reached, and then two impulses on the Z) wire in order to reach the second group of 20 within the hundreds in question.
  • the connector will then move upwards (even thousands) while first sending an impulse on the a wire, which is maintained while the ten first subscribers 20-29 are past, and then 8 impulses on the Z2 wire, whereby the 37th line is reached.
  • sequence switch D Upon the completion of the connection with the connector the sequence switch D was moved into its fourth position and a circuit 32 was closed through the relay SR- which energizes and connects itself in a locking circuit.
  • sequence switches SO and SO are moved into their second positions in which they remain during the horizontal movement of the connector.
  • the clutch magnet MK operates and the connector starts to the left sending out four impulses over the a wire by means of the impulse disc J S which controls the impulse circuit 36 of the register switch RE
  • the impulse disc 53 is then inoperative as the impulse circuit over the 1) wire is then open at a contact of the relay R WVhen RE reaches its fifth position which is connected to earth at a contact X, R energizes and disconnects RE which is thus stopped.
  • a circuit is therefore closed through the relay SR over the (Z wire and immediately after the eanne sequence switches SO and 59;; move into their second and fourth positions respectively. SO then disconnects the relays SR and SR the latter, however, remaining energized over a holding contact.
  • the clutch magnet MrI is therefore again operated (together with the shifting magnet VR and the connector is started upwards.
  • the sequence switch S0 entering its fourth position the a wire was connected to the contact bar K5 ot' the connector. This causes a circuit 48 to be closed through the relay R which locks itself over a holding contact and immediately after SO is moved into its eighth position.
  • Figure l is closed ore?- the two line branches (a and through the line relay LR. The latter completes a circuit 2 through a starting relay SP. (or SR it the subscribers line connected to the lower group B of wires) common to ten subscribers Belay SR closes in manner which will be more closely described in connection with Figure 5, the starting circuit for a number (for instance of preselecting line finders S which are Flt'""1"t(l at one time in the horizontal direction.
  • Tie pie-selecting line finder which first finds the contact row to which the calling subscribers line is connecterh is caused to stop in a manner which wi l be more closely described in connection ;h Figure 5 by a test relay opening contact [i in the circuit At the same tim i other preselectmg finders of the appert rig group the finders are put in circuit. l.., pie-selecting line r s thei started upwards or downwards respectively.
  • the pre-selecting line i finds lie the calling subcompleted through one y l ly B which energizes 1 i5 winding of a test rel a and closes a locking circuit 5 through the other w' and a circuit 6 through the cut-oil w y Lg il oi the subscriber.
  • TUB is operate the s lOO whereby the call-lamp PL shows a flashing light, its circuit being closed and opened by a rotating interrupter
  • calls may have entered into the two other groups, when the corresponding call.- lamps are lighted, but only that one corres ioiiiding to the subscriber connected through to the operator shows a flashing light.
  • ri hen SO enters its second position, SO F igure 1, receives current over the circuit 12, whereby it is moved into the fifth position In this position the line branches at, F) 1) connected to the talking circuit 13,
  • buttons are arranged as usual in five rows corresponding to the different digits of the subscribers numbers. Attr the buttons have been depressed they are retained in their position by holding magnets FF -FE, which receive current over a contact D as long as SO is in its second position.
  • the operator actuates the starting button EK, whereby a circuit 1 a is closed extending from earth at the first contact row over the contacts 70 70, in the different rows of buttons, connected in series, and through a relay SR Figure 2, which energizes and puts itself in a holding circuit independent out the starting button.
  • the relay SR closes a circuit 17 for a relay DUE, which energizes and is locked independently of the keyboard.
  • the circuit of DR and BS is then opened. As long as DH is disconnected, the corresponding group is barred for further calls.
  • the sequence switch $0 Figure 1 receives current over the circuit 18, wherebyv it is moved into its sixth position.
  • lVhen SO enters its third. position the negative pole of the battery is connected tl :ough the resistance lV, Figure 3., over certain contacts in SO and the switch SO in question to the test wire 8, Figure 5, of the group of ten preselecting line finders S, in the group of group selectors S corresponding to the selected 2-thousands.
  • the negative pole ofthe battery is connected over a contact D Figure 3, and contacts on the switches SO and SO to a bus-bar'SS, Figure 5, for said group of selectors S whereby a number of starting relays F, R,-F R, are energized. The latter close the starting circuits 20 for said selectors, which are then started at one time in the horizontal direction.
  • the group selector which first finds the vertical row, to which the calling line or trunk FL is connected, closes a circuit 21 through one winding of the appertaining test relay lay R and the test wiper KF
  • the test relay energizes and connects its second winding into a locking circuit 22.
  • the contact row in question is barred to other finders by the test wire 8 in question obtaining direct earth connection over contacts of the test relay Lq R
  • the starting circuits 20 contain the clutch magnet MK all group selectors are started to the left.
  • the move ment is automatically reversed, when the carriage reaches its outer left position, the contact spring KF then closing a circuit 23 through a shifting relay HR, which con nee-ts the magnet MK in circuit.
  • the relay HR is then locked over its contact 2e and the relay will therefore remain current can rying, till the relay F1 1 deenergizes or till 25 is opened in the opposite end a contact position of the carriage.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Structure Of Telephone Exchanges (AREA)
  • Keying Circuit Devices (AREA)
US268069A 1917-12-24 1918-12-23 Semiautomatic telephone system Expired - Lifetime US1431116A (en)

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US268069A Expired - Lifetime US1431116A (en) 1917-12-24 1918-12-23 Semiautomatic telephone system

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DK31287C (da) 1923-02-12

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