Patent GB-163673-A (GB)
Abstract: 163,673. Molnßr di Nagymagyar, L. May 18, 1920, [Convention date]. Void [Published under Sect. 91 of the Act]. Multiplying and dividing apparatus in which the calculation is performed directly by the setting of both factors comprises a set of ten mutilated toothed wheels having teeth varying in number from 0À9 and two setting levers for each denomination. One set of levers A, Fig. 1, is used for setting the multiplicand or divisor and the other set B for the multiplier or quotient. The setting of the multiplicand by the movement of the levers A to the particular numbered notches of the guides in which the levers slide effects through sectors c<1> and toothed wheels b loose on a tube axis c, the rotation of corresponding discs a carrying the mutilated wheels d, d' and thereby conveys the appropriate wheels to an operative position with respect to the gear-wheels of a totalizing-counter p mounted in a laterally movable carriage s. The result of the multiplication by each digit of the multiplier is obtained by a similar movement of the levers B commencing at the units denomination each of which bv means of a sector D<1> thereon rotates a pinion k loose on a shaft an amount depending upon the setting of the lever B and through gearing l, h, i, n, o rotates the set wheels of the series d<0>, d<9> a number of times corresponding to the setting and thus actuates the totalizing-counter so as to indicate the sum of the partial products. The gear-wheel l is secured to the pinion k and is provi'ded with teeth as shown such that each toothed portion is adapted to rotate the pinion h through one revolution. The pinions h are fixed to an axis g on which is also rigidly mounted the partially-toothed wheels i, the teeth being provided on different parts of the circumference so as to act at different time for each denomination. The movement of each lever B from its blank or normal position to the zero position on the notched guide effects the shifting of the totalizing-counter carriage s by means of a tooth z<4> on the lever which rotates a pulley z<2> adapted, through a wire, chain, or the like, to rotate another pulley w<1> carrying a bevelwheel w engaging another bevel-wheel v having a toothed-wheel u engaging a rack on the underside of the carriage. In the case of division, the divisor is set up by the levers A, the totalizing- counter carriage is moved to the right, and the tooth z<4> is moved out of operative relation with respect to the pulley z<2> and a second tooth z<5> is adapted to become operative. The levers B are then successively adjusted beginning at the highest denomination until the dividend appears on the numeral wheels of the totalizer. In a modification the levers move in guides parallel and adjacent each other and the series of mutilated wheels are replaced by a single wheel having nine pivotal teeth which can be set to operative position by movement of the levers A and which effect the actuation of the totalizer by the movement of the levers B. Adding and subtracting apparatus.-The totalizer carriage is provided with additional sets of wheels g<3>, h<3>, h<4> and levers a which project through a numbered slot in the casing and in the known manner are used to effect addition and subtraction.