Patent GB-729830-A (GB)
Title: Automatic perforation copying machine for record cards
IPC: B65D1/30
Filed: 1952-09-25
Abstract: 729,830. Selective punching - machines. MAUL, M. Sept. 25, 1952 [Sept. 26, 1951], No. 24081/51. Class 31 (2). Relates to apunched-card machine permitting the punching of each of a set of cards passing through the machine in accordance with the analysis of the previouslypunched card of the set and also in accordance with the analysis of a set of pattern cards simultaneously fed through the machine. According to the invention, for dealing with cards having a plurality of decks each consisting of a series of adjacent perforation columns, the machine is provided with a single set of analyzers bw, Fig. 3, for the set of cards to be punched, a single set of analyzers bd for the set of pattern cards, and a single set of punches 27 operative upon the set of cards to be punched as determined by pre-setable column selectors, which are arranged in groups, one for each deck of the cards, and are brought successively and periodically into operative relation as the corresponding decks of the cards are in analyzing and punching positions. As shown in Fig. 3, the cards to be punched are fed one at a time from a stack 12 for analysis of the leading card by a set of brushes bw which extend across the machine and control a set of punches 27 operative upon the following card. The pattern cards are fed from a stack 11 and similarly analysed by the brushes bd which also control the punches 27. The two sets of cards are fed step by step through the machine by mechanism similar to that described in Specification 712,377, with the modification that the ratchet-wheel drive is arranged to speed up travel of the cards during change from one deck to another and from one card to the next. The punches 27 are also constructed and operated under the control of solenoids W as described in the prior Specification. The electrical connection of the brushes bd and bw with the solenoids W is by means of a plug board divided into as many sections as there are card decks. For a threedeck card, the board comprises, as shown in Fig. 13, three sets 95 of bars extending across and insulated from a second set of bars 90. The bars 90 are each connected to a brush bd and each bar in each set 95 is connected, through the switching means described below, to the solenoids W of a punch. By selectively inserting plugs in sockets at the crossing points of the bars of each section of the board, electrical connections can be established between the brushes bd and the solenoids W of any desired punch, thereby providing for transfer from any column of the pattern card to any desired column of the corresponding deck of the receiving card. Each of the bars in each set 95 is also provided with a socket whereby it may be connected by a plug with one of the brushes bw when it is desired to transfer from a column of the leading receiving card to the same column of the following receiving card. The connections between each of the three sets of bars 95 and solenoids W are controlled by two sets of switches uI, uII, Figs. 3 and 12, actuated automatically by a cam (105, Fig. 9, not shown) driven by the card-feed mechanism. In operation, plugs are inserted in the three sections of the plug board to provide the desired reproduction in the receiving cards, and, during passage of the cards, the switches uI, uII are actuated automatically so that the corresponding sections of the board are operative as the three decks of cards pass through the machine. Cam-actuated switches i, d, Fig. 12, which are provided in the circuit to the brushes bd, bw are opened automatically during the passage of each card from one hole position to the next and of each card to its initial operative position. The analysed pattern cards and punched receiving cards pass to receivers 14, 15 containing switches m<SP>1</SP>, m<SP>2</SP>, which open the electric control circuit when the receivers are full. Specification 716,839 also is referred to.