Patent GB-332668-A (GB)
Title: Method of and means for calculating and indicating the ratio of two variable quantities
IPC: G06G3/00
Filed: 1929-05-13
Abstract: 332,668. Julius, G. A., and Julius, A. F. Jan. 29, 1929, [Convention date]. Totalizators; multiple -indication apparatus. - The quotient of two continuously variable quantities is ascertained from the change in angular position of an arm pivoted on a clamp nut carrier on a rotatable lead screw and bearing against a support on a similar carrier on a second lead screw, the screws being rotatable in accordance with variations in the quantities. The invention may be applied to a power plant to determine the relation between the steam used and the horse power, or to a multiple store to compare the sales of a department with the total sales, or to a totalizator system to calculate the odds payable on each horse at any moment. As shown in Fig. 1 for use with a totalizator the shaft 100 of the grand total counter, through change speed gearing 13, a shaft 14, chain drive 15 and bevel gears 16, drives a lead screw 10 on which is mounted a carriage and nut 19, 20. To the carriage 19 is pivoted, at 25, an arm 12 carrying a counterweighted arm 27 adapted to cause the arm 12 to bear on a pair of rollers 32, 33 mounted in a frame 30 pivoted at 31 to a carriage and nut 23 mounted on a lead screw 11 preferably at rightangles to the screw 10 and operated from a horse total counter through change speed and other gearing similar to that described above. The angular position of the arm 12 which corresponds to the quotient of the relative rotational movements of the lead screws is transmitted to a direct reading or other form of indicator. As shown in Fig. 1 a flexible wire or cord 39 is fixed at one end to an adjustable fastening 40 and passes over guide pulleys 36, 37, 38 on a bracket 35 on the carriage 19 and over a guide pulley 41 to a snail cam 42 or cylindrical drum secured to the spindle 46 of an indicating dial 43. The cord is maintained in tension by a weight 44. A temporary support for the quotient arm 12 in its vertical or zero position is afforded by a roller 51 slidable along a guide bar 52 and attached to an endless belt 54. When the nut 20 of the carriage 19 is freed to lift the carriage to zero position the nut passes by a detent arm 92, but in the descent the nut 20 trips the arm 92 so as to free a spring controlled arm 57, Fig. 7, the rotation of which under the action of a dash-pot of the door closing type pulls a cord 61 on a drum carried by the pulley 55 and moves the belt 54 to withdraw the roller 51 from engagement with the arm 12 which will then bear on the rollers 32, 33. A modified form of actuating means for the indicator is shown in Fig. 5, wherein an extension of the quotient's arm 12 carries a roller 71 bearing on a spring controlled bar 72 supported by parallel links 73, 74 and connected by a flexible cord 77 to a drum 78 on the spindle of an indicating dial 79. In another modification, Fig. 6, the arm 12 carries a link 83 forming part of a parallel motion device 82 the' movement being transmitted through a drum 84 to a cord 85 similar to the cord 77. In another arrangement the pivot of the arm 12 carries the armature or rotor of an electric motor its movement being communicated to one or a plurality of electrical indicating devices. The apparatus can be arranged to determine what odds the investor would obtain on the 1st, 2nd, and 3rd placed horses by the attendant first setting the change speed gearing 13 to permit of a percentage deduction for management expenses, commission, taxes &c., the balance being divided between the horses in a known proportion according to the number of horses running in a race. To ensure that the devices are all at the zero position a plurality of electric contacts are provided and arranged in series with a signal or control device 105, Fig. 1.