Patent GB-650821-A (GB)
Abstract: 650,821. Counting-apparatus; totalizators. TOTALISATORS, Ltd. (Automatic Totalisators, Ltd.). Oct. 16, 1947, No. 27724. [Class 106 (i)] [Also in Group XXIV] A gear assembly for use with race totalizator odds computing devices comprises a main gear pinion, means for driving the pinion in correspondence with a transaction count accumulating in a grand total adding unit, a driven levy gear able to mesh the pinion, a driving levy gear fixed coaxially to the driven gear, therewith to constitute a levy gear unit, a swing bracket which is axially and angularly movable relative to the main pinion and whereon the levy gear unit is freely revolubly mounted, a stepped gauge block, a locator pin which extends through the swing bracket and is engageable within any one of four cavities in the gauge block, four driven gears which are fixed together in coned arrangement and are adapted to be selectively meshed by the driving levy gear, and mechanism for drive connecting the coned gears to a grandtotal odds-computing line shaft. A sprocket 10, Fig. 2, driven in accordance with the grand total, is fixed to the sun-wheel 11 of a differential gear unit, the cage of which carries a striker arm 16, Fig. 2. During initial movement of the sprocket 10, the sun-wheel 12 being stationary, the cage is rotated and a pin on the arm 16 engages between the limbs of a stirrup 18, Fig. 3, not shown, fixed on a pin 19 of a spring- loaded toggle lever 2, Fig. 1, the nose 22 of which closes a pair of contacts 23 to energize a magnetic clutch 24, the driving member 25 of which is continuously rotated. The sun-wheel 12 is thereupon rotated backwardly through gears 26, 27, 28 and 29 so that when the sprocket 10 halts or slows down the arm 16 returns to its initial position and the contacts 23 will be re-opened. The magnetic clutch 24 is therefore de-energized to stop the sun-wheel 12 which carries a gear-wheel 30 which through suitable gearing 31, 32, and 33 rotates a shaft 34 which carries the main gear pinion 9. The pinion 9 meshes with the larger, 35, of two gears 35, 36, Figs. 2 and 4, constituting a " levy " gear unit, the difference in the numbers of teeth on the gears 35, 36 being proportional to the levy (e.g. tax, costs and remuneration) on the grand total. The gears 35, 36 are coaxially fixed on a boss 37 free on a bearing-sleeve 38 fixed in the outer end of a swing bracket 39, Fig. 4, axially slidable on and rotatable about a bearing sleeve 40. The gear 36 may mesh with any one of four gear-wheels 43, 44, 45 and 46, Fig. 2, concentrically fixed together in " coned " formation and keyed upon a final drive-shaft 47 connected by gears 48, 49, Fig. 3, to a sprocket 50 for direct operation of the grand total oddscomputing line shaft. The shaft 47 may be rotated through a clutch 51 by a crank handle 52 for re-setting purposes. The four coned gears 43, 44, 45 and 46 provide for alteration in the speed and proportion of rotation transmitted to the shaft 47 to allow for two or three dividends and doubling (or halving) of the capacity, i.e. the total number of " bets " with which the totalizator can cope. A pin 54 carried by and slidable in the sleeve 38 is screwable into any one of four holes 56, Figs. 1, 2 and 5, in four step faces 57, 58, 59 and 60 of a fixed gauge-block 61 to position correctly the gear 36 with relation to the selected one of the gears 43, 44, 45 and 46 with which it is to mesh. The pin 54 when in position in any hole 56 abuts and pushes outwardly a corresponding rod to effect closure of a corresponding switch 67, Fig. 4, whereby a related indicator device in the control room is actuated to signify the capacity and the number of dividends for which the apparatus is set.