GB514780A - Improvements in or relating to calculating machines - Google Patents

Abstract

514,780. Calculating-apparatus. BALDWIN, R. E. May 9, 1938, No. 13863. Drawings to Specification. [Class 106 (i)] A calculating machine is provided with a plurality of totalizers including two algebraic totalizers, means for transmitting an amount from one totalizer or the other, and means operative under control of the transmitting totalizer to condition the receiving totalizer to subtract when the amount held by the transmitting totalizer is negative. The invention is shown applied to a record card controlled tabulating machine ofthe kind described in Specification 405,666 and provided with three rear add and subtract totalizers and three associated front totalizers which serve to accumulate grani totals. The rear totalizers are allotted to different fields of the cards to accumulate items of a different class. In total taking operation following a change in sub-group designation the first rear totalizer prints its sub - total through the agency of the printing elements of the corresponding front totalizer and transmits the amount thereto. Then the second and third rear totalizers successively print their sub-totals and transmit the amounts to their respective front totalizers and also to the first rear totalizer so that the latter holds the sum of the sub-totals printed while the wheels of the second and third rear totalizers are zeroized. Thereafter a fourth total taking operation occurs during which this sum or cross total is printed from the first rear totalizer and the wheels left at zero. When a change in main group designation occurs the above four total operations are followed by a grand total taking operation simultaneously from all the front totalizers. In the machine described the card feed control is similar to that set fourth in Specification 371,849, the designation pin box and item sensing pin box are of the type described in Specincations 271,935, [Class 106 (i)], and 401;012 respectively, the zero :stop control is similar to that set forth in Specifications 26896/13 and 319,086, [both in Class 106 (i)], the printing mechanism is of the known form described in Specification 461,612, and the total shaft control and the change of designation with a five cycle control are similar to that described in Specifications 426,054 and 484,911 respectively. Means is also providedfor causing two additional total taking operations to occur immediately after the total taking operation which results from a change in designation by the action of the cam on shaft 153 and lever 160, Fig. 1, as described in Specification: 484,911.