Patent GB-422792-A (GB)
Title: Improvements in or relating to record-card-controlled multiplying apparatus
IPC: G06F7/46
Filed: 1933-07-18
Abstract: 422,792. Calculating - apparatus. BRITISH TABULATING MACHINE CO., Ltd., Victoria House, Vernon Place, Southampton Row, London. July 18, 1933, No. 20319. Convention date, July 19, 1932. [Class 106 (i)] In record-card-controlled machines it has been proposed to record on the cards the products obtained from one or both factors read from the cards. In certain cases it is desirable to record the results on separate cards or sheets or on separate cards as well as on the record cards. In accordance with the present invention, a record card controlled multiplying machine is combined with a recording mechanism and as the cards are fed through the respective mechanisms a comparing mechanism is operative to compare designation perforations and to give a warning or stop the subsequent machine operations when the designations do not agree. The apparatus includes a machine similar to that described in Specification 405,031 and a card punching machine, as a separate unit, generally similar to that described in Specification 362,529, [Group VIII]. The multiplying machine includes the usual card feeding and reading section, registers for entering the factors and designation characteristics, accumulator sections, and a punching mechanism. The supplementary punching-machine is, as shown in Figs. 1, 2, 2a, and 3, provided with the usual card feed racks 181s, 182s, clutch mechanism 185s, and card ejector mechanism 229s. It is also provided with a master card duplicating device and a set of contacts 293s and a conductor 294s arranged in a set of comparing circuits. The duplicating device comprises a holder for a pre-punched master card, a contact roller 286s and a co-operating set of brushes 285s connected each to a punch selecting magnet. The brushes are normally out of operative position but when the data on the master card is to be read and duplicated a magnet 292s is energized to raise the brushes. The reading out mechanisms of the designation register and of the left-hand section of the accumulator are connected by leads and cables to the brushes 293s, 285s, to relay coils plug connected to studs on a commutator board associated with the feed rack 181s, and to sockets plugged to studs on a commutator board 220s associated with the feed rack 182s. As the cards pass through the multiplying machine the factors and designations are entered in the registers and the card is then presented to the punching section. This card and the supplementary card are then fed concurrently through the punching section and through the multiplying machine. As the brush 300s makes contact with the related studs 298s the corresponding relay coil is energized. The coils are energized in succession for the successive denominations of the designation so long as these agree with the settings on the register, whereupon the multiplication operations are initiated. If there is lack of agreement at least one of the relay coils remains inoperative so that multiplication cannot be effected. Release keys in the two punching mechanisms are depressed to displace the cards. An errors key in the machine is then depressed to reset the registers. After the product has been registered in the accumulator the amount standing thereon is read out in a duel manner by energizing the punch magnets of the multiplying machine and those of the supplementary machine through brush connections with commutator studs 221s and conductor 222s. Specification 358,105 also is referred to.