Patent GB-341990-A (GB)
Abstract: 341,990. Totalizators. ERICSSON TELEPHONES, Ltd., 67, Kingsway, London, and LIMB, F., Holmwood, Fellows Road, Beeston, Nottingham. Oct. 30, 1929, No. 32951. [Class 106 (i).] In an electric totalizator and for a single bet a conductor transmits a plurality of signals each indicative of a particular characteristic or element of the bet. Transmitting - arrangements. These are illustrated in Fig. 1, and include eighty competitor keys grouped in four sets of twenty, of which one key only in each set is shown, viz : BK1, BK2, BK3 and BK4. A place key PW is also provided to enable a bet to be registered for a place instead of a win. When a bet is initiated, a " home " switch TM is set in motion and this automatically produces a step-by-step following movement of a distant switch such as BA at the central station, Fig. 2, the two switches coming to rest on finding the marked contact. Central station equipment: Figs. 2 and 3. In addition to the " distant " switches BA, BB &c. a receiving switch RA and a registering switch UA with displaying connections are provided in respect of each competitor and class of bet. Action. When a competitor key is depressed, for example key BK1 corresponding to horse No. 7, a contact OA is closed mechanically and completes circuit for a relay SE which at its contact se2 causes through a lead 1 the energization of a relay HD at the central station. Another contact se3 produces the energization of a relay ST and through a lead 3 the partial energization of a relay SD. A circuit for the magnet of switch TM is now complete by contact st1 and by reason of interrupter contact tm1 the switch advances one step. Relay ST then releases and the shunt being removed from the left hand coil of the distant relay SD, this operates fully and contact sd2 closes to produce advance of the distant switch BA, the wiper ba6 then breaking circuit to relay SD to release it. The home switch TM, due to the wiring of the bank of wiper tm2, now advances four more steps as does also the distant switch BA due to the wiper ba8. To prevent the latter switch from overrunning the home switch, the banks of wipers tm3 and ba7 are interwired by the leads 4, 5, 6, 7 as shown, so that if switch BA catches up switch TM before the fifth off-normal position is reached, a relay SC, Fig. 2, is energized and its contact sc1 breaks the magnet circuit of switch BA. When switch TM reaches its fifth off-normal position, its magnet circuit is opened by wiper tm2 and on arrival of switch BA at the same position its magnet circuit also is broken by wiper ba8. The relays ST, SD now function to advance the home and distant switches as before, until the switch TM reaches the contact marked by the depressed key BK1 whereupon relay SZ is operated by a circuit through the key and through wiper tm6, and is held by contact sz1. Contact sz2 now breaks the magnet circuit of the home switch TM and when the distant switch BA reaches the same position its circuit is broken by energization of relay SC in the manner already stated. Contact sz3 now has removed the short circuit through the right hand coil of relay D so that this relay is in the bet signal circuit traced thus :-earth, contacts se3, sz2 in parallel, d5, relay D and resistance R1 in parallel, contacts co3, co4 in parallel, key BK1, wiper tm6, contact sz5, line 10, contacts sc4, pc2 and wiper ba4 of the distant switch, conductor 9 and in one path a winding of relay LA, Fig. 3, and battery and, in another path, an outlet of the receiving switch RA. Relay D does not operate in this circuit but relay LA does and its contact la1 closes an operating circuit for the receiving switch RA which then advances until the marked contact is reached by the wiper ra2 whereupon circuit to relay CA is completed. Contact ca1 now opens the circuit of the stepping magnet and closes circuit for a relay CXA, the contact cxa1 of which effects energization of the magnet of the registering switch UA. The contact ua10 shunts relay CA and a signal is consequently sent back to the transmitting station, of sufficient strength to cause operation of the relay D. Relays LA, CA and the right-hand winding of relay D are thereupon de-energized, but the relay D is held by a circuit through its left-hand winding. Relay SE also releases. The registration on the grand total counter is effected by contact d3 which completes a circuit through the right-hand winding of a relay TB, line 8 contacts sc2, pc1 (Fig. 2) and lead 12 to a receiving switch like RA. The bet having been collected a signal is sent back to operate the relay TB and thus break at tb3 the circuit of relay D which then releases and in turn releases relays SZ, HD. The switches TM, BA now step to home position by the completion of their homing circuits. Relay CA having released, circuit is broken to the magnet of switch UA which thereupon advances to register the receipt of the bet on the particular competitor, the totals of these bets being indicated electrically by the wipers ua6 .. ua9. Relay TB having operated contacts tb1, tb2 complete circuit for the ticketissuing motor JA which finally restores the key BK1 and contact OA. Action with keys in different groups. If a key BK2 is depressed the operations take place as before except that when the switch TM reaches the marked contact the bet signal circuit through the right-hand winding of relay D and contacts co3, co4 continues through key BK2, wipers tm4, tm5, contact sz4 and line 2 to wiper ba2 and thence to a receiving switch similar to switch RA. If a key in the third group, viz : BK3, is operated, contact OB instead of OA is closed and a relay SB is energized. This closes a circuit from earth, through contact sb1, wipers tm4, tm5, and line 2 to a relay GR, which subsequently locks up. The contacts gr1 .. gr4 now change over the controlling leads from switch BA to switch BB. Relay CO becomes energized through contact sb2 and its contacts co1, co2 close circuit to relay SE. The system now operates as before except that switch BB instead of BA follows switch TM and the signal passes along line 10 and through wiper bb4, to the associating receiving switch. If a key in the fourth group, BK4 is set, contact OB is again closed but the bet signal circuit in this case is completed through line 2. Place bets. If a place bet is to be entered, the key PW is operated before the competitor key. Resulting from this and assuming the competitor key to be in group 1, a relay PC is operated through line 8 and locks up, and contact pc2 changes over the signal circuit through line 10 to wiper ba5 the bank of which is wired to corresponding receiving switches. If the competitor key is in any other group similar operations occur and either contact pc2 or pc3 controls which of the wipers in Fig. 2 shall be effective to select the required receiving switch. Zeroizing. To restore the registering switches UA to zero a switch KH is thrown over to energize a relay H and de-energize relay SA (energized normally by a line 20 from the next higher denomination) and the contact h1 then completes a homing circuit for the switch. The contacts sa1 .. sa4 released by their relay open the circuits of the indicator. Specifications 340,280, 340,288 and 340,289 are referred to.