Patent GB-377319-A (GB)
Abstract: 377,319. Totalizators. ERICSSON TELEPHONES, Ltd., 67, Kingsway, London, and LIMB, F., Holmwood, Fellows Road, Beeston, Nottingham. April 30, 1931, No. 12716. [Class 106 (i).] In testing arrangements for a totalizator system a faulty section can be isolated so that betting may continue on other sections. The bet signalling channels of a group of machines are arranged to be in turn diverted by way of the testing equipment, when tests for " earth " or " battery " faults, discontinuity, and of contact between two competitor lines may be made. The testing equipment is described as used with the totalizator system set forth in Specification 368,445. The ticket machines are located in a number of buildings, each building having machines TIM1 .. TIM40, divided into two subsections comprising the odd and even numbered machines respectively, and corresponding competitor lines as L6, L13, are multiplied as at A, AA to all ticket machine buildings, through isolating links LK. The central testing apparatus comprises rotary access switches TMA, TMB, competitor keys as HK6, HK13, machine building keys AK1, AK2, .. ; BK1, BK2, . ., and associated relay equipment, multipled to corresponding access switches DA, DB and associated equipment at each machine building. To commence testing, a start key SK, Fig. 1, is operated energizing a relay ST, and the key, HK6, for example, corresponding to the surmised faulty competitor apparatus, and a machine building key, as BK1, are depressed. A relay STX energizes over the circuit st4, gf1, tma5, stx2, and locks over stx1, st1. A relay H operates over st3. Relays SS, RD, HX, energize over the circuit st4, gf1, tma5, SS, BK1, cr1, da6, to RD, and over hx2 to HX, the latter locking over hx1, h1. At contacts ss1, the drive magnet tma is energized, and by self-interruption advances to the fifth (off normal) contact, the energizing circuit after the first step being over contacts ss1, sz1. A relay SD energizes in series with RD after the switch TMA moved from normal, and locks over contacts h<1>, rd<1>. Contacts sd<1> correspond to ss<1> and drive magnet da correspondingly steps by self-interruption to its fifth (off normal) contact. In the checking position of the switches TMA, DA relay SS again energizes and the switches are advanced as from normal and continue to step, DA later than TMA, until wiper tma4 encounters the contact marked by competitor key HK6, whereupon a relay SZ is energized to stop the switch thereon. Switch DA is stopped on the corresponding contact by energization of a relay SC over a circuit st4, gf<1>, tma5, 2A, 2, 2B, da7, cr3. A common relay CR, relay IA corresponding to competitor number 6 and a relay GF now energize in series, over da5, sc2, sz2. At contacts ia1, ia2 the normal registering circuit for horse number 6 is diverted via wipers da3, da4 for the " even " and " odd " subsections respectively, contacts sz3, wiper tma3, line 6 to the jack J6, and a lamp AL is lit at the testing house over contacts gf2 to indicate that tests may now be made. Earth test. The even subsection is first isolated by throwing a key EK, and then tested by momentarily depressing a key ETK to operate a relay ET, which will lock over contacts et1 to earth at the fault if such exists, and light an indicating lamp ETL over et2. The machine building key AK1, .. corresponding to the building under test is then thrown to light a fault-indicating lamp BAL at the building. When the fault is cleared, relay ET falls off extinguishing lamp ETL. The odd subsection is tested by first throwing the isolating switch OK, after which the operations are as for the even subsection. In each case betting may proceed on the subsection not under test, the registering circuit thereof being extended by way of keys EK or OK, contacts sz3, and wiper tma3 to line 6. Battery test. The even and odd subsections are again tested separately by depressing the keys EK, OK, respectively, after which a key BTK is momentarily operated to energize a relay BT over contacts gf4. If a battery fault exists, relay BT remains locked over contacts bt1 to the fault and lights a lamp BTL, whereupon key AK1 is operated as before to light the lamp BAL at the machine building. Discontinuity test. When lamp AL lights a key SBK, Fig. 2, is thrown, causing switches TMB, DB to hunt similarly to the corresponding switches TMA, DA until they reach marked contacts corresponding to horse number 6. The contacts of banks da3, da4, da5, tma3, tma4, are connected seriatim to horse wires numbered 1, 2, .. The corresponding banks of switches TMB, DB are, however, connected in reverse to this so that these switches will come to rest on the eighteenth (off normal) contact, when a relay GFA, corresponding to GF, will be energized in series with relays IA, CR, a'lamp BL lighting to indicate that the test may now be made. For the even subsection, keys EK, EBK, CYK are thrown and ETK momentarily operated. Relay ET operates and, if the multiple line from contacts ia1 through the even machines to contacts ia3 is continuous, will be locked by way of et1, EK, da3, ial, ia3, db5, EBK, CYK, maintaining lamp ETL alight, to indicate no fault. The odd subsection is similarly tested by throwing keys OK, OBK instead of EK, EBK, and then momentarily operating ETK. In either case, if the multiple is broken, and key AK1 depressed, the lamp BAL will light when the fault is cleared. Contact fault between competitor lines. The keys HK6, HK13, for example, associated with both competitor lines surmised to be at fault are first depressed, and then the start and building keys SK, BK1 operated. Switches TMA, DA step to their seventh bank contacts, marked by key HK6, as described. Key SBK is now operated, and switches TMB, DB step to their ninth contacts marked by key HK13, a relay IB, corresponding to IA, being operated in series with CR and GFA, the registering path for horse 13 being diverted by way of contacts ib3, ib4, for the even and odd subsections respectively, through the testing equipment and line 13 as described for horse 6. Lamp BL lights to indicate that the test may be made. A key CTK is now thrown. As a contact fault may exist between different competitor wires in the odd or the even subsection, or in different subsections, tests are made with keys EK, EBK, OK, OBK operated in corresponding combinations, key ETK being momentarily depressed at each test. If the fault exists, for example at X, between lines in the odd subsection, the relay ET will lock up over contacts et1 to earth supplied through the fault from keys CYK, CTK; lamp ETL remains alight, and the fault is signalled to the building by operating key AK1. If no fault exists in the building all keys except the competitor keys are restored when the testing switches TMA, TMB, DA, DB step to normal. Other buildings are then tested by operating the appropriate key BK2, BK3, .. as above. Should a discontinuity fault occur in a competitor line between the ticket machines and the counter, the path by way of the testing equipment may be used until the fault is cleared. If the number of competitors is small separate controlling test wires may be provided for each competitor, the step by step switches being dispensed with.