Patent GB-441643-A (GB)
Abstract: 441,643. Totalizators. SIEMENS BROS. & CO., Ltd., Caxton House, Tothill Street, Westminster, and BROOME, J. H., 80, Leyland Road, Lee, WOOD, A. F., 145, Kidbrooke Park Road, Blackheath, and SOUTHAM, A. A., 58, Larchwood Road, New Eltham, all in London. Sept. 20, 1934, No. 27036. [Class 106 (i)] In an electrically controlled apparatus for computing the quotient or product of two quantities of the kind in which the result is produced by the difference or sum of the movements of two controlling members in proportion to the logarithms of the quantities, the logarithmic movements of the controlling members are initiated by the operation of counting devices which respond to impulses characteristic of the quantities and the members during movement transmit impulses for setting lining-up devices, the movements of the members continuing until the lining-up devices and the counting devices are in positions of agreement. The apparatus is particularly adapted for the operation of an odds indicator for a totalizator. Odds indicator, Fig. 1. The odds indicator is of the thermometer type and comprises an indicator band 9 carried on rollers 2, 4 by wires 8 and operated by a wire 11 which carries a pulley 12 over which passes a cord 13, the ends of which are wound on drums 5, 6. The drums 5, 6 are operated in accordance with the logarithms of the total bets and the individual competitor bets respectively and consequently the pulley 12 and indicator band 9 are moved in accordance with the competitor odds. The movement of each drum 5, 6 is controlled by a detent 20, Fig. 4, which co-operates with notches 17 arranged on the thread 16 of the helical groove 15 which accommodates the rope 13. The notches 17 are spaced in accordance with the logarithms of the number of bets or a multiple thereof so that when the detent 20 is raised the drum is driven by a motor through a distance corresponding to the logarithm of the existing bets total. Notches 19 also are provided for the control of a follower 22 which operates contacts for impulsing a switch adapted to line up with the counting switch and thereby control the movement of the drum. Operation of system, Figs. 5-9. Restoration to normal. Fig. 5 shows the circuits serving one competitor, the switches TA, TB serving for counting the bets, the switch TB being moved forward one step for each complete rotation of the switch TA. Similar circuits also serve the grand total drums. Fig. 6 shows the circuits associated with the lining-up switches of a competitor and Fig. 7 those associated with the lining up switches of a grand total drum. When betting on an event is to commence, key OS, Fig. 8, and key RSK are closed in order to bring about a restoration to normal of the apparatus from the condition in which it is left after the previous event. Key OS energizes RTB, Fig. 7, which reverses the field of the motor of the grand total drum, energizes a magnet N which removes a pawl from a ratchet of the drum, and operates magnet CMT to close the motor circuit and cause the drum to be driven in a reverse direction until normal position is reached. In this position the drum is fully wound with rope and a slidable carriage operated by the rope opens contact cw3 in circuit with magnet CMT. Key RSK operates relay RSB which restores the competitors' drum in a similar manner and also relays RS, RSA, RTA which close circuits for homing switches TA, TB, AA, AB, BA, BB. The homing circuits of all these switches together with those belonging to other competitors are serially-connected over the wipers and last bank contacts so that the switches are homed in turn until after the last switch is restored the circuit is extended to relay RX which releases relays RS, RSA, RSB. Relay RTB also is released in response to the restoration of the total drum. When all the switches are at normal relays C, CA, CB are operated over wipers of the respective counting and lining-up switches. These relays control the operation of the lining-up switches, the hunting operations being stopped only when the counting and lining-up switches are in agreement and the relays C, CA, CB are operated. Operation upon receipt of betting impulses. The counting switch TA is operated one step by contacts TC for every ten unit bets. As soon as wiper TA1 moves, " totals " relay CA releases and operates magnet CMT. The magnet CMT in addition to closing the motor circuit, raises the detent 20, Fig. 4, and the " totals " drum is driven. The contacts ic are operated by follower 22 and the switch BA is stepped until wipers BA1, TA1 are again in alignment when CA pulls up and the motor is stopped. The detent 20 also is released and the drum is stopped by the detent engaging the logarithmic notch representative of the counting bets. Similar operations occur in the competitor apparatus, Fig. 6, the competitor drum being driven by the motor until wipers TA1, AA1 are realigned and relay C is reoperated. At the end of each rotation of switch TA, switch TB is operated one step and relays C, CB are released at each change to cause the associated switches AB, BB to keep in alignment. Re-spacing of logarithmic notches. Since the difference between logarithms of consecutive numbers becomes progressively smaller as the numbers increase, increased spacing of the notches is provided as the number of bets counted increases. In order to effect the operation of the lining-up switches in a corresponding manner, bank contacts of wipers TA2-TA5 and TB2 and similar bank contacts of switches AA, AB, BA, BB are commoned so that relays C, CA, CB are maintained operated to prevent operation of the lining-up switches in correspondence with the altered spacing of the notches. In this manner operation of the logarithmic drums may be effected at each alternate step of the switch TA or at each fifth, ten or other multiple step. Correcting displayed indications. The competitor and grand total lining-up switches are provided with keys K, KK. Operation of any key closes self-interrupting homing circuits for the switches and reverses the motor so as to restore the associated drum and indicator. An indication also is given that the indicator is restored. The operated key is then restored and the lining-up switches and indicator are again operated until agreement with the counting switches is again established.