Patent GB-342518-A (GB)
Abstract: 342,518. Totalizators. ERICSSON TELEPHONES, Ltd., 67, Kingsway, London, and LIMB, F., Holmwood, Fellows Road, Beeston, Nottinghamshire. Jan. 30, 1930, No. 3153. [Class 106 (i).] In a totalizator system, a bet signal is not accepted by the totalizing equipment unless a definite number of code lines (other than one) or not less than such number has been marked. Moreover the registering circuit relating to a second bet may be prepared before the preceding bet has been accepted by the pool totalizer. In the particular arrangement illustrated depression of a horse key applies earth potential to three out of six lines A .. F and a switch P (p) thereupon hunts until it is brought to rest by its wipers engaging contacts not earthed. This position of the switch therefore provides an outlet 9 to the totalizer corresponding with the particular key. In the case of forty horse keys being required a discriminating relay circuit 13, GC is closed at g by any of the second twenty keys, to divert the bet signal at gc1 to another outlet bank p7 of the hunting switch. If the capacity is increased to eighty runners as by using a second issuing-machine SM1, a second hunting switch is substituted for P by a changeover relay energized by a contact j, a contact g1 corresponding to contact g also being controlled by the second group of twenty in this second machine. Discrimination between win and place bets is provided by a key K1 or K2 and a line 16 to a relay PC, the contacts pc1, pc2 &c. of which effect the necessary diversions of the signal. Operation. Depression of a key, besides earthing three of the lines A .. F, closes circuit at h through a relay M to a relay ST. Relay M does not operate but relay ST does and at st2 completes a circuit to one winding of a relay TR. Consequently relay TP is energized through contact tr1 and at tp1 closes a circuit through the left-hand winding of relay TR and the three earthed lines say ABC. The relay TR is wound differentially so that if three and only if three lines are earthed, the currents in the two windings balance and the relay relapses. This produces de-energization of slow-to-release relay TP and the operation of relay N the contacts n1 .. n6 of which break the connections with the lines A .. F. A circuit is now completed at n10 to a relay SZ but this is shortcircuited at R8 and n9 by the earth circuit through the wipers p2, p3, p4 of the combination switch P. So long as relay SZ is thus shorted, earth on line 4 causes the magnet of this switch to operate but when the wipers reach a position (in this case No. 1) such that none of them is earthed, relay SZ operates and at sz1 the switch magnet circuit is broken and earth applied through a line 5 to relay BS, Fig. 5. Resulting from this, earth potential on line 6 passes through one winding of a relay HB and a resistance R9 in parallel and through lines 7, 8 to wiper p5 and thence to the horse totalizer through line 9. The horse totalizer may be as described in Specification 340,288 and the revertive signal, in the form of an increase of current in the signal line, causes relay HB to operate and lock up and through contact hb3 and leads 20, 21 energize relay TS. At the same time contact hb4 introduces a further battery to line 10 and thus causes relay M to operate and effect the ticket issue. Relay TS is held operated and maintains relay BS energized through contacts ts1, tz3, and bs1. Contact ts2 opens the bet-signal circuit but relay HB remains operative through its right-hand winding. Relay TS also closes a circuit at ts5 to the right-hand winding of relay TB and thence to the line 11 leading to the pool totalizer. The arrangements for counting the total number of bets and sending back a revertive signal to the relay TB (similar to HB) may be the same as for the horse totalizers. When relay TB operates and locks up, relay TZ is energized through contact tb2 and contact tz2 breaks the pool signalling circuit. At the end of the ticket-issuing operation, relays M, ST, N, SZ and HB release, followed by relays TS, TB and TZ. Entering a second bet. Until a bet has been registered on the pool totalizer, relay BS remains energized and holds relay TS. If therefore another key is operated before these are released the operations previously traced take place up to the operation of relay SZ. The new signal cannot however be sent to the horse totalizer as the signal circuit is broken at ts2. When the previous bet has eventually been accepted and revertively signalled, relays TB and TZ operate and relays TS and BS are free to attend to the second signal. Modifications. (1) If combinations greater than three are also to be accepted relay TR would be modified so as to be operated only when three or more of the code wires are marked and to be effective upon operation instead of on release. (2) In place of hunting switches such as P, groups of relays may be used and only combinations of three or more be utilized to direct the bet signals to the appropriate horse totalizers.