Patent GB-1004431-A (GB)
Title: Perforating apparatus
IPC: G06K1/02
Filed: 1961-09-13
Abstract: 1,004,431. Selective punching - machines. CUMMINS-CHICAGO CORPORATION. Sept. 13, 1961 [Sept. 14, 1960], No. 32889/61. Heading B4B. A perforating machine comprises a base 44 for supporting a document to be perforated with coded indicia, a perforating head 41 reciprocable with respect to the document, rows 31 to 40 of punches carried by the head for independent endwise movement, the rows of punches having associated therewith rows 61 to 70 of interposers which are selectively operable by a row of spring-influenced hammers 122a to 122e pivotally mounted on a spring-influenced carriage 121 carried by the head 41, the hammers being operatively connected to the armatures 139a to 139e, Fig. 5, of solenoids 136a to 136e, and the carriage having ratchet teeth 169 engageable by a pivotally-mounted pawl 161, Fig. 12, for moving the carriage stepwise along tracks 128, 129 so as to position the rows of hammers successively opposite each row of interposers. The punches of each row and the corresponding interposers are stepped in length, the punches being guided by means of apertured stepped shelves 50a to 50e, Fig. 10, and withdrawn after each punching operation by means of a stripper 52. The head 41 is reciprocable by means of a motor-driven eccentric shaft 99, connecting rods 100, 100<SP>1</SP>, pairs of links 94, 95 and 94<SP>1</SP>, 95<SP>1</SP> and a one-revolution clutch 108, 109, Fig. 4 (not shown), which is controlled by a solenoid 110, Fig. 3. The pawl 161, Fig. 12, carries spring-influenced pallets 166, 168 engageable with the carriage teeth 169, the pawl being rocked through a complete cycle by means of a solenoid 176, Fig. 13 (not shown). The solenoids 136a to 136e are energized selectively through a coding matrix 150, Fig. 18 (not shown), when the keys of a keyboard 146, Fig. 5, are depressed, punching being effected by depressing motor bar 148. The interposers are maintained in either of their positions by means of spring detents 218, Fig. 11 (not shown). The selected interposers are returned to their inoperative positions by means of the fingers 228a to 228e of a rake plate 226 which has a translational movement imparted thereto during the upward movement of the head 41 by means of a floating lever 244, Fig. 17, pivoted at 249 and having a cam surface 245 engageable by a cam 250 secured to the connecting rod 100<SP>1</SP>. The other end of the lever 244 is pivoted at 246 to a pivotally-mounted hook 240 engaging a lug 242 on the rake plate. The translational movement of the plate 226 is rendered inoperative by energizing a solenoid 252, by depressing repeat key 149 on keyboard 146, should it be desired to perforate the same coded information in successive documents. Energization of the solenoid 252 retracts pivot 249 so that the cam surface 245 is moved out of the path traversed by the cam 250 and the lever 244 pivots about its end 246. A pivotally-mounted lever 195, Fig. 15 (not shown), forms a lost-motion connection between the carriage 121 and the base 44, the lever having an upstanding arm 198, Fig. 6, coupled to the carriage and a horizontal arm 200 positioned to overlie one of the faces of an angularly adjustable detent stop 205. By adjusting the stop, the row of hammers may be returned opposite any desired row of interposers during movement of the head 41 towards the base 44. Sprocket holes are punched in the document by means of punches 85, 85a. Specification 1,004,432 is referred to.