Patent GB-383649-A (GB)
Title: Improvements in and relating to ratio computers more particularly for totalisator odds indicator apparatus
IPC: G06G3/00
Filed: 1931-06-15
Abstract: 383,649. Totalizators. TOTALISATORS, Ltd., Thames House, Queen Street Place, London.-(Julius, G. A. and Julius, A. F. ; Culwulla Chambers, Castlereagh Street, Sydney, Australia.) June 15, 1931, No. 17385. [Class 106 (i).] The odds on a competitor are ascertained from the change in angular position of an arm pivoted to a carriage movable in a vertical runway and bearing against a support on a similar carriage movable in a horizontal runway, the carriages being movable, by means of flexible lines, in accordance with variations in the pool and horse totals respectively. The angular movement of the arm is translated into linear movement of a flexible strip, fixed at one end and passing round a pulley mounted on the arm, the other end being wound on a drum fixed to the indicator spindle. The carriage 49 slidable along the horizontal runway 44, 45 moves to the left under the tension of a line 48 weighted at 52 when a line 53 tensioned by a weight 55 is released by a sprocket wheel 54. The latter is geared through 17, 18 to a shaft 11 which when released by the horse total escapement magnet 31 is rotated by a weight 13 and counterweight 13<x> connected by a line 14 wound over a drum 15 integral with wheel 54, the rotation of the latter and therefore the motion of carriage 49 being proportional to the horse total. A carriage 58 slidable in a vertical runway 56, 57 is caused similarly to move upwards under the tension of a line 80 weighted at 79 when the sprocket wheel 81 is released by the pool escapements. A lever 65 pivoted at 66 to the carriage 58 is counterweighted at 68 to cause the quotient arm 67 connected thereto to bear against rollers 70, 71 mounted in a bracket 72 pivoted at 70<x> to the carriage 49. In the zero or vertical position of arm 67 the heel 100 of lever 67 engages a roller 101, the portion 100, 105 being so shaped as to pass over roller 101 slowly so that the arm 67 contacts gently with rollers 70, 71 after a small registration on the pool totaliser. The angular movement of the arm 67 is translated to the pointer 33 moving over an appropriately calibrated dial 27 by a line 73 fixed at 74, passing over pulleys 75 .. 78 and wound on a drum 37 geared at 35, 34 to the indicator spindle 24, a line 91 weighted at 90 and wound over a drum 95 integral with spindle 24 maintaining the line 73 taut. Pulleys 75, 77, 78 are idle but pulley 76 moves with the arm 65, 67, angular movement of the latter causing a linear motion of line 73 which is translated to the pointer 33 by the drum 37. For place or any other betting where only a definite proportion of the pool is available for dividend, appropriate change gear mechanism may be inserted in the pool transmission system. The horse total may be indicated on the dial 27 by a pointer 29 fixed to a sleeve 30 carrying a drum 23, a line 22 wound thereon being at its other end wound on a drum 21 geared through 20, 19, 38, 16, 17, 18 to shaft 11, the line 22 being caused to wind on to drum 23 by a weighted line 94 wound on a drum 92 integral with drum 23. For zeroizing purposes adjustable stops 102, 106 are provided, and the wheel 15 may be provided with a free-wheel device to facilitate rewinding of weight 13. The chain 14 may be rove over idle rollers. Alternatively the shaft 16 may be driven through a slipping clutch. To vary the capacity of the apparatus, differently sized sprockets 54, 81 may be used, a check device being provided to render all the indicators inoperative until the appropriate change gears are made. For transport purposes the brace 47 is pivoted at 62 and when released at 61, the vertical runway and brace 62 may be folded about the horizontal runway. A thermometer type indicator may be used. Auxiliary indicators. If these are to be of the dial type as in Fig. 1, the indicator spindle 24 is geared to the armature of a master " Selsyn " self-synchronizing motor the movements of which are followed by " Selsyn " auxiliary motors correspondingly geared to indicator spindles at each indicating station. If the indicators are of the thermometer type, the drum 37 is replaced by a drum 137, Fig. 3, a weight 140 on a line 139 wound on drum 138 maintaining the line 73 taut. The spindle 141 corresponding to shaft 24, Fig. 1, carries a bevel pinion geared to a pair of planet wheels 143 meshing with a further bevel wheel 145 keyed to the shaft of a wheel 147 driven by a worm 148 on a shaft 149 which passes through a clutch drum 150 and is coupled to the spindle of a " Selsyn " motor 152. Two electromagnetic clutches 155, 156 the driving elements of which are continuously driven in opposite directions through gearing 157, 166 and 158, 167, 168 respectively from a belt 163 are adapted to drive shaft 149 when their respective clutch magnets are energized over the spring contacts 181, 182 mounted on a click pawl 180 when the latter is rocked from its central position. When the shaft 141 rotates, the wheel 145 is held stationary by a magnetic brake acting on drum 150, and the planet wheels 143 mounted in a rocker box 144 turn the latter from its central position, Fig. 3, an arm 175 thereof engaging one of the tappet rollers 178, 179 to rock the tumbler 176 about its pivot 177. The click pawl 180 connected by a spring 225 to the tumbler is thereby rocked to one of the side notches in the sprung arm 186 thereby energizing one of the clutch magnets 155, 156 in series with the brake release magnet 173, the " Selsyn " motor and the pinion 145 being driven until the latter rocks the tumbler 176 and its pawl 180 back to normal central position. The spindle 149 thus moves in either direction to take up a position proportionate to the movement of line 73. At the auxiliary stations a " Selsyn " motor 200, Fig. 2, drives through appropriate gearing 201 a drum 202, a weight 204 at the end of a band 203 wound thereon indicating the odds against a scale 205. The lines used are preferably metallic tapes but they may be light chains, wires, fabric tapes or cords. The lines may be of the sprocket type and sprocket wheels fitted instead of pulleys where drive is taken therefrom.