Patent GB-390020-A (GB)
Abstract: 390,020. Totalizators. WELLS, R. E., Duntroon Avenue, Roseville, near Sydney, Australia. May 25, 1932, No. 14836. Convention date, June 22, 1931. [Class 106 (i).] In an odds-calculating arrangement, individual logarithmic cams receive movement simultaneously from their respective horse counters and from a logarithmic cam moved by the pool counter, the resultant logarithmic movement of each individual cam being translated to operate the corresponding odds indicator. The pool logarithmic cam 10, Fig. 2, mounted on a shaft 9, coacts with a stop 11 threaded on a spindle 16 rotated through gearing 18 (fixed on 16), 19, 24, 23, 22, 21, 25, Fig. 7, by a sprocket chain in accordance with the pool counter setting. The stop 11 is adapted to slide along a radial slot 12 in a disc 112 free on the shaft 9 and adjustably fixed to a bracket 13 by a pin 14 which may engage one of the holes 15 depending on the percentage deduction from the pool for expenses &c. Further radial slots, for example 33, 34 with individual stop gear mechanism are provided in disc 112 and intergeared to operate in predetermined ratios, for example decimal ratios, in which case the various stops corresponding to decimally related denominations of the pool total become operative successively, a stop being thrown out of gear as the pool total passes to a higher denominational value. Thus stop 11 will at the outward end of its travel rock a pivoted arm 31, Fig. 5, to release an arm 28 which rocks under the action of spring 29. A pin 27 on arm 28 engaging a collar 26 on shaft 20, Fig. 7, raises the latter against the action of spring 32 to disengage the gears 23, 24, the cam 10 being now controlled by the stop of the next higher denominational value. Individual horse mechanism. Each mechanism comprises a logarithmic cam 52, Fig. 2, mounted on a sleeve 55 free on shaft 9, and rotated clockwise by a weight 39 under the control of a stop 53 and associated mechanism similar to that of the pool cam 10 but driven through a ratchet free-wheel device 43 from the individual horse counter. The disc 51 corresponding to disc 112 is adjustably mounted on shaft 9 and rotates therewith under the action of weights 54, 35, Fig. 2, according to the logarithm of the pool total in an anticlockwise direction. The resultant logarithmic rotation of sleeve 55 is translated into uniform reciprocating lineal movement of a stop 60, Fig. 6, by a logarithmic cam track 57 in a disc 56 mounted on the sleeve. Various sections of this cam may be plotted to different scales in which case provision is made for automatic corresponding changes in the gearing to the indicator. Odds indicator. Cords 61, 62, Figs. 4 and 6, weighted at 67, translate the movement of stop 60 into axial movement of a sleeve 63 and the screwed spindle 64 thereof, whereby a fork 69 connected to a weighted cord 70 oscillates through a pulley 71, a switch arm 72 to contacts 73 or74 which start an electric motor(not shown) geared to wheel 76. The latter drives the units indicator drum 79 through gearing 87, 86, 85, 84, 83 the higher denomination drums 80, 81, 82 being advanced by transfer star wheels 88, 95, 100, or other suitable means, and through pinion 65 causes a return axial movement of the shaft 64 until the motor circuit is broken at 72. Contacts 73, 74 are reversing contacts for the motor which thereby sets the indicator positively or negatively according to the axial movements of sleeve 63. Modifications. In an alternative method of transmitting the movement of stop 60 to the indicator, the stop is screwed on a spindle 104, Fig. 10, carrying a friction wheel 105 adapted, on movement of the stop, to engage one of oppositely rotating wheels 107, 108, the spindle 104 being thereby rotated until wheel 105 reaches a normal position. The pinion 106 may actuate the indicator in any suitable manner. The individual horse mechanisms may all be mounted on shaft 9, or alternatively the latter may be in several sections geared together. The stops 11, 53 may be driven directly by chain-and-sprocket gearing or electrical step-by-step motors. A master electric motor driving the pinion 76 may also operate slave indicators. Suitable zeroizing mechanism for the stops and cams may be provided. The stops instead of moving lineally may be mounted so as to move along an arc the cams being suitably modified.