Patent GB-370016-A (GB)
Abstract: 370,016. E 1 e c tr i c totalizators. AUTOMATIC ELECTRIC CO., Ltd. (formerly AUTOMATIC TELEPHONE MANUFACTURING CO., Ltd.), Strowger Works, and McCLEW, J. W., 27, Arlescourt Road, West Derby, both in Liverpool. Jan. 1, 1931, No. 114. [Class 106 (i).] Equipment, for example a decoder, common to a number of machines is associated with the machines in turn and if a fault occurs in the equipment an auxiliary equipment is automatically switched into use. The invention may be regarded as a development of that described in Specification 355,680. General arrangement. Elements of one ticket machine are shown to the left of the broken line in Fig. 1 and from the keyboard proceed code transmission and control lines terminating on the banks of a rotary switch TCS, Fig. 2. The wipers of the code banks are wired to storing relays A-F, Fig. 3, serving to decode the signals and direct the registering impulses to the counters by way of lines h1-h6, h9, h22-h40. Preliminary operations. A competitor key having been depressed, and if necessary the " place key PLC also to change over the transmission lines at pb1-pb8, mechanically closed contacts MCH extend earth to the code lines and through the upper winding of a relay R to a contact in the bank 7a of the switch TCS. The start key BSK being depressed a relay SR is energized over interrupter contacts tcm and through interaction at contact st1 the driving magnet TCM is operated to set the switch TCS in motion to find the marked contact in the bank 7a. To prevent excessive arcing at contact sr1 a condenser CND and resistance YA are connected in series with the magnet and with an alarm relay G shunted by a metal rectifier MRC. Provided normal conditions obtain, relay G acts to open the circuit of slow-to-operate relay GA but if no current or continuous current flows relay G will not be energized and relay GA will operate its armature ga1 to give a signal at HFS. Operation after connection with ticket machine. When the marked contact is found high resistance relay L is energized and at l1 holds the relay SR operated and therefore maintains the switch TCS stationary. The particular code lines marked by the key are now in communication over the wipers 1a-6a with the code relays A-F and one winding of a relay P. Due to the high resistance of this winding only the relay operates and at p1 puts its low resistance winding in circuit to enable the code relays to operate and lock up. Further armatures of relay P lock the magnet TCM at p2, operate the relay SW at p4, and at p3 prepare the checking circuit through the sets of code contacts a12-f11 and aa1-af1, the latter belonging to the checking code relays AA-AF disposed in parallel with the code relays. The operated relay SW by means of its armatures sw1-sw11 controls and prepares various circuits as indicated, and when the code relays have correctly operated and broken their energizing circuits at a13-f11 relay P relapses. If the code relays and their check relays are not in agreement however the circuit prepared at p3 and sw11 becomes effective to maintain the relay P operated and as detailed below this causes a signal to be given and the auxiliary decoder to be brought into use. If however all is in order, when -relay P releases, circuit is made through contacts p4, sw2 and relay TR to the counting-apparatus. The relay, operated when revertively energized, causes at tr1 relay TI to operate and at tr2 effects total registration by way of a line 10 and similar revertive operation of relay CR. Relay TI locks up at ti1 and at ti2 transfers the control of the alarm circuit through relay DG to the relay CR. Other armatures of relay TI open the circuits of the checking relays and the holding circuits of the code relays and bring down relay TR. When, upon completion of registration, relay CR operates, its armature cr1 opens the circuit of alarm relay DG before this has had time to operate, and at cr2 completes a circuit to relay TP from the ticket machine, in series with relay R. Consequently both relays operate and relay R locks up at r1, and closes circuit at r2 to the machine-operating magnet LM. The machine operates, e.g. as in Specification 342,261, and the relays are released as soon as the mechanical contacts MCH open. The operation of relay TO meanwhile has brought down relay L at tp1 and thus relay SR is de-energized and the switch TCS is free to hunt again. Non-runner arrangements. When earth by way of relay TR has been extended to a non-runner lead and thereby to a. common non-runner bar NRC, Fig. 4, a relay NR, Fig. 2, is energized over the lines 12, 13 and by its resistance prevents operation of relay TR. By means of various armatures therefore the relay NR prevents operation of relay L, opens the locking circuit of relay SW, opens at nr4 the holding circuits of the code relays and at nr6 their initial energizing circuits also, and at nr5 completes circuit over the wiper 8a to the cancel relay CL, Fig. 1, to warn the operator to cancel the bet. Faults. If the code and checking relays are not in agreement the holding circuit for the right-hand winding of relay P will be closed through the sets of contacts a12 &0. and aa1 &c. and relay SW will be held long enough to bring about the effective operation of the time relays SP, ZP. Upon operation of relay ZP therefore relay SP is cut out of action, at zp3, Fig. 1, a relay CO is energized to throw over the various leads at col-co8 and co9, co11 to the reserve equipment, and at zp5 a circuit is completed to the fault-indicating lamps FAL, FAS. If a fault occurs in the registering circuits, relay TR or CR will not be operated by the revertive action within the time of operation of alarm relay DG and this will therefore energize and at dg1 prepare a holding circuit for NR, at dg4 complete an alternative holding circuit for relays A-F, at dg2 complete a similar circuit for the timing relays SP, ZP, and at dg3 complete a circuit for starting in operation a switch SVS the banks 2c, 5c of which are wired in parallel to the registering leads h1-h40. When the marked contact is reached, relay BS will be energized through its high resistance winding and at bs1 it will close a circuit to relay BC and stop the stepping of the switch. At bs3 earth is now connected through the wipers 1c, 4c to indicate the particular line at fault and by means of contact bc3 an alarm is given. Moreover at bc4 the earth from the code contacts is extended to the non-runner bar NRC and thence to the non- runner relay NR to warn the operator to cancel the bet. The timing relays also function as before to change-over to the auxiliary decoder. The relays BS, BC remain locked up meanwhile under the control of the reset key RSK and as the faulty circuit is marked as a non-runner circuit by the switch SVS the regular decoder may be again used should the auxiliary decoder fail. If the fault occurs in the decoder itself, the switch SVS will continue to step until it reaches a contact wired to a relay CA whereupon relays BS, CA are operated in series and relays DG, NR are locked operated to allow investigation while the change-over takes place as before.