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1. 发明专利

GB618488A Improvements in or relating to electrical signalling systems 未知
公开(公告)号：GB618488A
公开(公告)日：1949-02-22
申请号：GB3180746
申请日：1946-10-26
申请人： AUTOMATIC TELEPHONE & ELECT , GEORGE THOMAS BAKER
IPC分类号： H04M15/08
摘要： 618,488. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., and BAKER, G. T. Oct. 26, 1946, No. 31807. [Class 40 (iv)] In a line identification system of the type described in Specification 615,271 in which identification signals characteristic of the thousands and hundreds digits are injected into the subscriber's line circuit SLC from a lead 12 over a non-linear resistance ARA, and identification signals characteristic of the tens and units digits are injected from a lead 11 over a non-linear resistance ARB, the individual digit signals are injected into the leads 11, 12 in a similar manner, e.g. the lead 12 receives the thousands and hundreds identification signals respectively over the non-linear resistances ARN and ARP. Connection and starting of the identification sending equipment SLME takes place on operation of relays AA, D, SI, ZI as described in Specification 615,271, whereupon contact dr1 vibrates to connect alternately 600 c.p.s. spacing tone to the outgoing line via transformer TRG, and 750 c.p.s. tone to front contacts w1 ... z1 which operate successively tu induce tone in leads M1 ... 0 at instants during the sequence dependent on the digit characterised by the lead. Similar tones are introduced into hundreds marking leads C1 ... 0 and tens and units marking leads (not shown). During the first W ... Z cycle md is closed to connect up biassing battery E to render conducting 10 groups of 10 non-linear resistors such as ARD ... ARN so applying 750 c.p.s. tone sequences characteristic of the thousands digits to all such non-linear resistances as ARA. For each line circuit SLC connected to an outgoing relay set in which SI is operated, the corresponding non-linear resistance ARA is also biassed by the battery E to a conducting state and the 750 c.p.s. tone is transmitted over TRG to the outgoing trunk. On the next W ... Z cycle, cd is closed to transmit the hundreds digit over ARA. The tens and units digits are transmitted in the same way over lead 11 and ARB. Contacts dr1, w1 ... z1, md, cd ... may be operated by a simplified arrangement of the equipment shown in Specification 614,177, or by motor-driven cams.

2. 发明专利

GB589469A Improvements in or relating to telephone or like systems 未知
公开(公告)号：GB589469A
公开(公告)日：1947-06-20
申请号：GB732745
申请日：1945-03-23
申请人： AUTOMATIC TELEPHONE & ELECT , REGINALD TAYLOR , GEORGE THOMAS BAKER
IPC分类号： H04M15/08
摘要： 589,469. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., TAYLOR, R., and BAKER, G. T. March 23, 1945, No. 7327. [Class 40 (iv)] In a system in which the line switches or line finders are provided with in extra bank for metering, when the first selector is set to a level giving access to outgoing toll lines, the connection to the metering bank is transferred to an additional wiper of the selector and identification signals for the purpose of ticketing are sent thereover. The identification equipment is assumed to be of the kind disclosed in Specification 539,823 in which a code marking is provided for each line, the metering wire in this case being connected through non-linear resistance units to common points to which A.C. signals are applied. In Figs. 1, 2, the first selector has two sets of wipers, and the metering wire M is connected on a local call through a rectifier MRA to the test wipers P1, P2 to which positive battery is applied to actuate the meter MTR connected between the metering wiper D5 and the earthed homing bank D1 of the line switch. On levels allotted to toll lines, only one set of wipers gives access to outlets, the P2 terminals are earthed, the +2 terminals are left unwired and the - 2 terminals are connected to identification wires I extending to the outgoing relay sets. When the selector is set to such a level, post springs NP are operated to transfer wire M to wiper -2. The meter MTR may be actuated by a pulse over wire I if required. In this arrangement, there is a drain of signalling energy through the meters of lines in a calling condition, and in a modification for obviating this, Figs. 3, 4 (not shown), the meter MTR is connected between the test wiper D4 and the metering wiper D5, and wire M is normally earthed in the selector over post springs NP and rectifier MRA. When identification is required, positive battery is fed back over both wipers - 2, P1 to bias the resistance units of the calling line while shunting the meter. A jack MRTS is provided for routine testing, the meter being connected to test lead 12 when the line circuit is seized over a test selector. Specifications 447,767, 462,910 and 528,971 also are referred to.

3. 发明专利

GB583373A Improvements in automatic switches for use in telephone or like systems 未知
公开(公告)号：GB583373A
公开(公告)日：1946-12-17
申请号：GB1144044
申请日：1944-06-15
申请人： AUTOMATIC TELEPHONE & ELECT , REGINALD TAYLOR , GEORGE THOMAS BAKER
IPC分类号： H04Q3/00
摘要： 583,373. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., TAYLOR, R., and BAKER, G. T. June 15, 1944, No. 11440. [Class 40 (iv)] A final selector, which provides ordinary facilities when seized by a subscriber, can also be used by an operator as a trunk-offering connector, in which case different busy signals are given according to whether the wanted subscriber is engaged on a local or a longdistance connection. The " rectangular release " type of switch shown in Figs. 1 ... 3, which is operated in known manner when seized by a subscriber, has two sets of wipers, the second set being switched in by a relay WS operated at the end of the vertical train when the switch is seized over conductors 2+2 from an alternative level. Seizure by an operator over - 1TK, + 1TK causes relay OP to operate and lock at the end of the rotary digit. OP operates F to ensure ringing does not start automatically. If the called subscriber is idle, H and J operate followed by relay BD which applies busy tone from wire 12 to the private. The operator then throws her ringing key, earthing the line to operate the differential relay DF which short-circuits relay F to transmit ringing current, after which the connection is completed as usual. If the wanted line is busy, G and not H operates as usual and operator receives busy flash from wire 10. If the subscriber is busy in a local connection, no tone is received either from leads 12 (BD not operated) or 18 (OP operated). If the subscriber is busy in a long-distance connection, tone applied to the private as above reaches relay A via condenser QD and OP6. In the former case, to cut in the operator throws her ring key, energizing DF which operates relay CN so switching the speaking conductors through. G holds in series with CN until DF is released. To break down the connection, the operator again throws her ring key and DF operates BD which connects earth to the private through the low resistance coil of the retard TB. If the wanted party is the calling party, this shunts down the cut-off relay in his line circuit which may be that disclosed in Specification 574,312, and if he is the called party it shunts down relay H in the final selector. Relay WS acts as before to switch to the second set if the operator seizes the switch over conductors - 2TK, + 2TK. The switch as shown can be used to hunt over a P.B.X. group of 2 to 10 lines. Wiper P2 picks up battery on the first line and earth on the last line, while intermediate lines and ordinary subscribers are unwired. On release of C at the end of the rotary digit battery picked up by P2 operates HS to the release alarm earth 16. On busy lines, H is shortcircuited and G operates in series with the lower coil of HS as also does RM, stepping taking place as a result of interaction between RM and G. On reaching an idle line, G holds up in series with H which locks over its right-hand coil and short-circuits G which then releases, but not until H has disconnected RM and HS. HS holds A while G operates. If all lines are busy, earth on P2 maintains G. HS releases, leaving G locked up to put out busy signal.

4. 发明专利

GB574312A Improvements in or relating to automatic switches for use in telephone or like systems 未知
公开(公告)号：GB574312A
公开(公告)日：1945-12-31
申请号：GB182544
申请日：1944-02-01
申请人： AUTOMATIC TELEPHONE & ELECT , REGINALD TAYLOR , GEORGE THOMAS BAKER
IPC分类号： H04Q3/00
摘要： 574,312. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., TAYLOR, R., and BAKER, G. T. Feb. 1, 1944, No. 1825. [Class 40 (iv)] In a subscriber's line switch of the homing type, on an outgoing call potential is applied to the guarding conductor leading to the final selector multiple through the cut-off relay, which is of low resistance, and a wiper of the switch in off-normal position, so that the relay may be released by the application of the same potential from a final selector extending a toll call. The operation of line relay L starts hunting in the usual manner, and cut-off relay K pulls up in series with the magnet DM when an idle outlet is found. After the relapse of relay L, the holding ground fed back from the seized selector is extended through relay K and over wiper D2 to the incoming test wire. If now direct ground is applied to this wire from a toll final selector, relay K is shortcircuited, the existing connection is opened and the switch restores to normal, whereupon circuits are made for both relays K, L, but K operates first and disconnects L. If the subscriber is the called party in an existing connection, the breakdown ground will maintain relay K and force down the switching relay in the final selector. Relay K may be shunted by a condenser to pass the toll tone that is usually provided on toll calls. The common battery (or ground) lead 10 to the line relays may include a key LDK which serves to disable non-priority subscribers as regards outgoing calls during overload conditions. On long lines the release lag of relay L may be reduced to provide greater winding space and therefore it is arranged that holding ground is fed back from the first selector immediately upon operation of the line relay. A selector is described that is otherwise similar to that disclosed in Specification 447,767.

5. 发明专利

GB569487A Improvements in electrical signalling systems 未知
公开(公告)号：GB569487A
公开(公告)日：1945-05-25
申请号：GB1942643
申请日：1943-11-20
申请人： AUTOMATIC TELEPHONE & ELECT , REGINALD TAYLOR , GEORGE THOMAS BAKER
IPC分类号： H04H20/81
摘要： 569,487. Electric control systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., TAYLOR, R., and BAKER, G. T. Nov. 20, 1943, No. 19426. [Class 40 (i)] [Also in Group XXXIX] In a system for the distribution of programme matter, the inputs and outputs of the amplifiers at the control station A, substations C, G, H, &c. and tandem stations D, E, F can be supervised by an attendant at the control point, there being only one pilot line for supervision between each station and any station to which it is connected. Selection of tandem stations and stations reached indirectly and of amplifiers is effected by means of synchronously operated step by step switches. Means are provided for telephonic communications between the central station and any substation or tandem station. Station selection. When a station-selecting key such as KS, Fig. 3, is operated, the associated relay SK pulls up and locks, energizing SW, which is common to all the stations reached over a particular pilot wire. If the key is that of a directly reached outstation, SW is individual to that station and the wire to the back contact of ic3 is connected to wire SZ. Consequently, SW in addition to extending the pilot wire to relay I and energizing SSW, energizes SZ, all these relays being on a common circuit, Figs. 4 and 5, and the lamp SEL associated with the key glows and indicates the seizure of the station. If the key is that of a tandem station (or a substation reached via a tandem station) back contact ic3 is connected to wire SS instead of wire SZ and SS pulls up followed by SPU. At the tandem station, Figs. 8 and 9, a relay TSA polarized by a rectifier pulls up in series with the relay I, Fig. 4, and energizes a galvanometer relay TRR, e.g. of the kind described in Specification 518,877. This is followed by TPU, TH and the stepping magnet TS of a reverse drive switch. TPU interrupts the line circuit, releasing TSA, and completes a reversing circuit for TRR which releases TPU to allow the switch to step. TRR then swings back to its make position re-operating TPU which drives it back and so on. This interaction continues until TS again reaches its normal position. Each interruption of the line circuit by TPU, releases I at the central station to complete the circuit of the driving magnet CSM, the circuit being interrupted shortly afterwards by the release of SPO which re-operates when I comes up again. The two switches thus move together with CS slightly ahead. Ground connections to one or more of the terminals CS3 over contacts of the station key relay cause operations of the reversing relay RV in those positions and a corresponding operation of TSB in place of TSA at the tandem office. In those positions in which TSA is operated, one or more of relays SA, SB, SC pull up and lock and when the home position is reached again, a circuit is made over contacts of these relays for a relay such as HA which switches the pilot line through to a programme selecting circuit which may be local or may be at a substation. IB pulls up over the line to the programmeselecting circuit and energizes IR. If the central station amplifiers are to be supervised, the relay MSK is operated and this connects the supervisory circuit over wires 21, 22 to a circuit, not shown, to which the inputs and outputs of the various amplifiers can be connected by the operation of the appropriate programme-selecting keys. Programme selection. This is effected by operating a key such as KP1 to energize the associated relay PK which locks up and energizes relay PW to prevent the energization of any other PK relay. If the central station amplifier is to be supervised, MSK is operated and a circuit is made over wire 36 for a relay which connects the required amplifier to wires 21, 22. PZ also is operated and the lamp of the selected programme glows. Normally the output of the amplifier is connected up but if key KI is operated, a relay operated over wire 41 causes the connection of the input instead. If the amplifier is at another station, the programme selecting relay PK energizes PS which energizes RV to reverse the current in the pilot line and so operate PSA in the programme selecting circuit, Figs. 6 and 7, of the selected station. If the circuit is reached via a tandem circuit, Figs. 8 and 9, this action is brought about by the reversal of the connection of IB due to the energization of TSB thereat. PSA energizes RR which is a galvanometer relay similar to TRR described above and RR, PU, energize H and co-operate in the same way as TRR, TPU with I, SPU to cause synchronous rotation of switches PS, CS. If the control is via a tandem office, IB repeats the interruption of the pilot circuit. Certain terminals in bank CS2 are grounded by the programme-selecting relay and the relay IP for selecting the input instead of the output side and in these positions RV reverses the line current to operate PSA (directly or with the help of TSB in tandem connections). This causes the operation of a combination of relays DA ... DC with or without the input-selecting relay IT. Relays DA ... DC select the appropriate switching relay such as TA. At the central station, SZ pulls up when the switch reaches its home position, lights the programme lamp and reverses the line current to re-operate PSA and cause the operation of the selected switching relay. Telephonic communication. If the central station attendant throws key KT, TK pulls up connecting a telephone set in place of the supervisory set 37 to the pilot line over which a programme circuit has been selected as previously described. Switches CS, PS rotate in synchronism as before but no circuit is made for operating RV until the switches reach home again and PZ pulls up. PSA then energizes CT which connects up a telephone set in place of the line to the programme amplifiers and rings bell 57. When tho substation attendant replies A, AR pull up and the bell is cut off. Calls by a substation attendant are made by removing the receiver whereupon A energizes OG which locks and energizes CT to connect up the telephone set. OG also connects battery and ground to the pilot line to operate IC at the central station (with the aid of TIC, TOG at the tandem office if any) and this lights a calling lamp individual to the pilot line and rings a bell. The central station attendant then throws a key of the calling pilot line to operate SK, SW. ICR also is energized and operates SZ which lights the selection lamp corresponding to the key. The telephone key KT is then thrown to operate KT, PZ and complete the connection.

6. 发明专利

GB560120A Improvements in or relating to telephone systems 未知
公开(公告)号：GB560120A
公开(公告)日：1944-03-21
申请号：GB1309842
申请日：1942-09-17
申请人： AUTOMATIC TELEPHONE & ELECT , REGINALD TAYLOR , GEORGE THOMAS BAKER
IPC分类号： H04Q1/32
摘要： 560,120. Automatic and semi-automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., TAYLOR, R., and BAKER, G. T. Sept. 17, 1942, No. 13098. [Class 40 (iv)] In a system wherein calls are set up by an operator by dialling over a long junction, the impulses are received by a pair of grid-controlled gas-discharge tubes GTA, GTB which are coupled to the junction by a transformer T2 and respond alternately at the beginning and end of each impulse, and at the conclusion of dialling the current over the junction is reversed to operate the tube which responds at the ends of the impulses and so energize a switching relay SK which disconnects the transformer T2 and extends the junction to the incoming selector. When the calling operator throws her dialling key, relays RR, RP pull up and battery and earth are connected to the junction by way of relay RS and inductances T1 which with a shunt condenser QD and resistance YG form a low-pass filter. Relay RS energizes and connects up DT, which shunts out RR and makes a circuit for impulse relay A. The battery and earth connections to the junction are now shorteircuited, and the short-circuit is then openedintermittently as relay A responds to dialled impulses. The initial closure of the junction circuit produces no effect since the anode circuit of the tube GTB is open, but the voltage pulse resulting from the application of the short-circuit triggers the tube GTA into operation and energizes relay PD, which connects up KO, CD to seize the incoming selector and brings in a series condenser QH to hold itself temporarily and to extinguish the tube GTA. The grid bias voltages of the two tubes are made slightly different to compensate for their different cathode potentials, and condensers QF, QG and resistances YM, YP are provided to guard against false operation by parasitic surges, as described in Specification 556,326. Each impulse gives rise to two voltage pulses in opposite directions, the first of which triggers the tube GTB and energizes relay PS followed by PB which repeats the impulse, extinguishes the tube GTB and connects relay PZ to the anode of the tube GTA, so that it responds to the second pulse and restores PB. On the return of the dialling key, the resistance of the sleeve circuit is lowered to operate relay MR which reverses the battery and earth connections to the junction and opens the short-circuit across them. The resulting voltage pulse triggers the tube GTA and since PB is now back relay PD operates a second time and connects up KN, whereupon CD falls back and switching relay SK energizes and locks to the test wire. Relay KO releases slowly, and meanwhile there is no circuit over the junction for RS which therefore falls back and disconnects RP (DT having been released by MR) to effect switch-through at the outgoing end of the junction. Relay D responds to the reply and clearing signals in the usual manner. When the operator disconnects, the restoration of MR opens the loop over the junction to initiate the release of the incoming selector and in due course SK is unlocked. If the operator disconnects before completing dialling, the release of impulse relay A produces the same effect as the beginning of an impulse, and the prolonged operation of PB initiates the release of the incoming selector. The relapse of CD causes a momentary operation of SK which opens the circuit for RS to free the junction at the outgoing end. If the incoming selector fails to release, CD is held and SK cannot operate, so that the junction is maintained busy at the outgoing end by RS, RP and cannot be re-seized by re-insertion of the plug. Specifications 551,187 and 560,132 are referred to.

7. 发明专利

GB556926A Improvements in or relating to contact banks 未知
公开(公告)号：GB556926A
公开(公告)日：1943-10-27
申请号：GB1296643
申请日：1942-04-20
申请人： AUTOMATIC TELEPHONE & ELECT , GEORGE THOMAS BAKER
IPC分类号： H01H63/06
摘要： 556,926. Automatic exchange switches. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., and BAKER, G. T. April 20, 1942, No. 12966/43. Divided out of 556,918. Drawings to Specification. [Class 40 (iv)] A terminal bank for a number of switches comprises a number of conducting strips forming the multiple and a number of combs individual to particular switches co-operating with these, the comb teeth and the strips being furnished with contact parts of silver &c. The detailed description is identical with a part of that in Specification 556,922.

8. 发明专利

GB556922A Improvements in or relating to automatic telephone systems 未知
公开(公告)号：GB556922A
公开(公告)日：1943-10-27
申请号：GB521942
申请日：1942-04-20
申请人： AUTOMATIC TELEPHONE & ELECT , GEORGE THOMAS BAKER
IPC分类号： H01H67/12
摘要： 556,922. Automatic exchange systems and switches. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., and BAKER, G. T. April 20, 1942, No. 5219. [Class 40 (iv)] Switches for automatic exchange systems comprise a terminal bank built up from multipling strips and comb-like members, the teeth of which can be bent into engagement with the strips, and contact-selecting and operating sets which are jacked into the bank and comprise primary, secondary and release magnets but no separate control relays. First selectors are also provided with a control relay set which cooperates with all the magnets of a train of switches to cause them to act as group and ordinary or PBX final selectors. This arrangement is convenient also for trunk offering and testing and for causing group selectors under special control to behave like PBX final selectors. The jacked-in parts of all the switches may be identical, differences in behaviour being brought about by the action of the common control set in conjunction with characteristic potentials permanently connected at the jacking-in points. The arrangement eliminates most of the relay contacts normally present in the talking circuit. The contact-selecting and operating members are driven by a constantly acting source of power, e.g. an individual or common electric motor with the help of a special clutch and linkwork which convert the rotary movement of the motor into a smooth step-by-step movement of the selecting and operating member. The arrangement is such that if an impulse is able to initiate the stepping operation the step is completed however short the impulse may be, and the system may employ " flick impulses " derived from condenser discharges and having a constant length independent of the make-to-break ratio of the originating impulses. Features of the system are claimed in Specifications 556,918, 556,919, 556,920, 556,921. Specifications 545,634, 549,047, 551,187, 556,928 and 556,929 also are referred to. Switch construction.- The terminal banks of a number of switches are built up from vertical strips 23, Fig. 1, provided with silver contact points and connected to outgoing circuits and horizontal combs 24 provided with silver-tipped teeth and connected to the incoming circuits, of the switches. The selecting part of each switch is jacked in to the bank as at 37, Figs 8 and 17. It comprises a pair of contact operating arms 53, 54, which may also carry wiping contacts, on a primary carriage which is driven across the bankface to select a row of contacts and is supported by a secondary carriage which is then driven so that the arms enter the bank to select a particular set of contacts. The carriages run on magnetized rails. During the secondary movement, the release magnet 78 holds the contact-operating members clear of the contacts by means of a guide frame 34, 46. The driving arrangements are a development of those described in Specification 545,634. On the operation and release of the primary magnet 74, which is a standard type of relay with a latch 82 secured to its armature, a cam-shaped clutch disc 48 is brought into engagement with a constantly running disc 47 and reciprocates an arm 76 in the direction of its length. By means of an additional cam surface co-operating with the frame, the arm is also given a rocking movement so that a pin 87' on its end enters a slot in a ratchet member secured to the primary carriage at the beginning and leaves it at the end of each forward stroke. When the driving pin enters a slot, a holding pin 118 on a pivoted arm 43 is forced out of a retaining ratchet and vice versa. A double movement of the latch arm 82 is necessary for each step. A similar drive is employed for the secondary movement but, where this is a hunting movement, the'carriage is given two steps for each rotation of the driving cam and stepping is continuous while the secondary magnet is energized. When the release magnet is energized at the end of the primary movement, it withdraws a detent 38 from the holding ratchet of the secondary carriage. In the normal position of this carriage, a holding pin 122 on a pivoted arm 33 is held clear of the holding ratchet by engagement of a pivoted projection 39 with the frame, but the first secondary step causes the projection to tilt so that the holding pin operates during the stepping movement in the same way as the holding pin 118. At the end of the movement, the release magnet is released and tilts the arm 33 so as to disengage the pin 122 and allow the arm to latch itself in this position, the carriage being held lower by the pawl 38 controlled by the release magnet. Consequently when the release magnet is operated again, the secondary carriage is restored owing to the removal of this pawl. Restoration of the primary carriage results from engagement of a hook 44 on the retaining arm 43 with a fixed projection 42, Fig. 8b, when secondary restoration is complete, the resulting removal of pin 118 allowing the primary carriage to return to normal. On reaching normal, it disengages the hook 44, Fig. 8a, in readiness for the next primary stepping action. In a modified arrangement, the projection 42 instead of being fixed is movable by the release magnet to bring it into engagement with the hook 44 without any movement of the secondary carriage. This enables primary release to be given by releasing the release magnet without any secondary movement and secondary release to take place without primary release (the energization of the release magnet being maintained in this case). As shown in Fig. 18, the switches may be arranged in sets of 20 one above the other. All the sets may be of one stage or they may consist respectively of first, second and final selectors. The switches may have individual motors or all those in a vertical row may have a common motor as shown. Sprockets are provided on the shafts so that two may be coupled together by bicycle chain if a motor fails. Each switch may be contained in a sealed cover from which projects a pinion which engages a corresponding pinion on the power shaft when the switch has been jacked in. The horizontal wiring is carried in three run-ways 91 ... 93. Common control circuit ; group selector. Figs. 22 and 19.-A simple circuit arrangement is described with reference to Figs. 6 and 7 (not shown) in which the switches test for busy ground and impulses are repeated to the switches in the ordinary way so that the secondary magnet of a final selector controls the clutch by a double-pin arrangement as shown for the primary magnet in Fig. 8. The control circuit shown in Fig. 22, however, sends an impulse of limited duration for each impulse received as described in Specification 549,047 so that a single pin on the clutch disc is sufficient, and the switches test for idle battery. When the control circuit is seized, line and release relays AA, BB come up and condenser QE is charged. Primary magnet 1VR in the group selector, Fig. 19, is operated over the negative wire to prepare the switch for operation and disconnect the marking battery from the P wire to busy the switch and control circuit. The first dialled impulse brings up E which energizes MD which locks. Each impulse discharges QE through HR which repeats the impulses over the negative wire to 1VR. At the end of the digit, QD, which was connected up by E and has been repeatedly discharged by HR, is enabled to charge sufficiently for the tube NT to break down and energize CC which locks and releases E. Battery over relay D is connected via wire Z to release-magnet 1ZR in the selector. D and 1ZR operate, the latter energizing the secondary magnet 1RR. The first step off-normal switches the circuit of 1RR over to the negative wire so that D releases and the switch hunts until the test wiper RW1 encounters battery on the terminal of an idle line whereupon test relay H disconnects the negative wire, the switch stops and release magnet 1ZR is released to lower the contact operating members and so effect the switch through. HR also releases CC (provided E has fallen back) and is itself released by the relapse of 1ZR. All trunks busy.-The switch is stopped in an extreme position and springs 1SI connect ground to the positive wire to operate G which locks and connects up busy tone. Regular final selector, Fig. 20.-Primary control is the same as that of the group selector. The secondary magnet 2RR, however, is connected to ground instead of to battery and therefore does not operate immediately on the operation of the release magnet 2ZR but waits for battery impulses from contact hr 3 Relay CC is thus released on the relapse of E, since relay D remains energized. At the end of the second digit, CC completes the test circuit over the positive wire and, since in this case the release magnet is not released on the termination of the secondary movement, the test circuit is closed long enough for the operation of H if the line is idle. Supply and control of ringing current.- On the operation of H, which locks up, 2ZR is shunted out to complete the circuit in the final selector and ringing current is sent out over F, and D is released. When the called party replies, F switches through and locks up, and D re-operates, releasing MD to complete a metering circuit. Busy signal.-If relay H fails to operate, the relapse of E followed by that of CC energizes G which connects up busy tone and causes the release of the final selector releasemagnet. No effect is produced on the existing connection, however, since the positive, negative and Z wires are all disconnected at G contacts. Release.-On the relapse of AA, E pulls up in series with BB which holds. After an interval timed by the condenser QD, CC comes up and releases E and BB whereupon H, F and D fall, releasing the primary magnets in the switch train and so operating their release magnets. If release occurs prematurely the most recently seized selector takes a primary step and a secondary step an

9. 发明专利

GB556918A Improvements in or relating to the arrangement of switches in automatic telephone exchanges 未知
公开(公告)号：GB556918A
公开(公告)日：1943-10-27
申请号：GB521542
申请日：1942-04-20
申请人： AUTOMATIC TELEPHONE & ELECT , GEORGE THOMAS BAKER
IPC分类号： H01H67/12
摘要： 556,918. Automatic exchange switches. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., and BAKER, G. T. April 20, 1942, No. 5215. Drawings to Specification. [Class 40 (iv)] The detailed description is identical with a part of that in Specification 556,922. The claims relate to the layout of the switches in the exchange and the cabling between them and to arrangements for driving them by means of vertical shafts common to a number of switches. Specification 556,926 also is referred to.

10. 发明专利

GB529026A Improvements in or relating to telephone systems 未知
公开(公告)号：GB529026A
公开(公告)日：1940-11-12
申请号：GB1128040
申请日：1940-03-23
申请人： AUTOMATIC TELEPHONE & ELECT , REGINALD TAYLOR , GEORGE THOMAS BAKER
IPC分类号： H04Q1/34 , H04Q1/36
摘要： 529,026. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., TAYLOR, R., and BAKER, G. T. March 23, 1940, No. 11280. Divided out of 528,971. Drawings to Specification. [Class 40 (iv)] A mechanical regenerator which is generally similar to that described in Specification 458,095 is adapted for the storing and repeating of signals in a five unit code consisting of two operative impulses in characteristic positions with respect to five timing impulses by arranging for the receiving magnet to be stepped by the timing impulses and for the marking magnet to be released to displace pins in positions in accordance with the operative signals. The signals are repeated by means of two sets of interrupter springs which are closed alternately by the sending disc. One set controls the outgoing impulses and the other controls a test for the displaced pins whereby the character of the impulses corresponding to displaced pins is changed. As shown the timing impulses are of 50 cycles and the operative impulses of 50 + 150 cycles. The invention is described with reference to a system identical with part of that described in Specification 528,971.

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