GB434052A - Improvements in or relating to means for multiplying or dividing varying quantities or measurements - Google Patents

Abstract

434,052. Calculating-apparatus ; indicating-apparatus. ELECTROFLO METERS CO., Ltd., Abbey Road, Park Royal, London.-(Republic Flow Meters, Inc. ; 2240, Diversey Parkway, Chicago, U.S.A.) Sept. 20, 1934, No. 27123. [Classes 106 (i) and 106 (iv)] Multiplying or dividing apparatus comprises a pair of arms each moved in accordance with one factor, the arms being parallel when in their initial positions and approaching each other during their movement and being connected to a third arm whose position indicates the product of the two factors. In the form shown in Fig. 1, a pointer 12 on an arm 10 pivoted at 14 is moved to indicate one factor on a scale 16 and a pointer 22 on an arm 20 pivoted at 18 is moved to indicate another factor on a scale 28. The product of the factors is shown on a scale 38 by an arm 30 also pivoted at 14, the arms being connected by links 40, 42, 48. The product of three factors is obtained by the apparatus shown in Fig. 7. The first and second factors are set on the scales 16 and 28 as before and their product is shown by a pointer 136. The third factor is set by a pointer 122 on an arm 120 pivoted at 118, and the final product is given by the position of a pointer 236 secured to an arm 230 pivoted at 232 and moving adjacent a scale 238. The arms 130, 120, 230 are connected by a linkage similar to that shown in Fig. 1. The apparatus of Fig. 1 can be arranged for computing square roots and squares by connecting the arms 10, 20 by gearing so that they always move through equal angles. The apparatus of Fig. 7 is shown modified in Fig. 10 for obtaining cube roots and cubes, the factor arms 10, 20, 120 having toothed quadrants 310, 320, 420 secured to them and engaging a common gear wheel 84 whereby the said arms always move through equal angles. Indicating-apparatus. The device is shown in Fig. 15 as applied to a fluid-flow meter, a pointer 728 indicating the product of tho square root of a pressure and the square root of a pressure difference. A rack 776 is moved according to the pressure difference and rotates a pinion 782 and cam 734 on which bear rollers 738 pivoted on a link 740 carried by a lever 742. The lever 742 is thus moved proportionally to the square root of the pressure difference. A lever 744 is rocked in accordance with the pressure and is so connected by a link 746 to a lever 748 pivoted at 750 that the lever moves according to the square root of the pressure. The levers 742, 748 are connected by links 754, 756, 760 to a lever 766 carrying the pointer 728. A pointer 730 is connected to the lever 744 by a lever 792, link 790, arm 788 and shaft 737. The lever 792 is adjusted on the lever 744 so that the pointer 730 indicates atmospheric pressure.