Patent GB-908880-A (GB)
Abstract: 908,880. Selective punching-machines. BUD, M. Feb. 5, 1960, No. 4131/60. Class 31 (2). [Also in Group XIX] A workman's timerecorder comprises a card support 202, Fig. 6, for positioning a card 1 relative to punches 107, Figs. 2, 4, and clock mechanism 300 controlling the support 202 and punch-actuating drum 4 so that the general position of a mark punched in the card is indicative of the time of marking, the general position being determined by the control of the drum 4 in so far as the transverse position on the card is concerned and by the control of the support 202 in so far as the longitudinal position on the card is concerned, the former representing subunits and the latter units of time. The drum 4 has ten punch - actuating projections 23 equispaced longitudinally and peripherally and is rotated a tenth of a revolution every three minutes when an electromagnet 17 receives a pulse from the clock mechanism 300. The card support 202 is attached to a rack 201, whereby it is lowered a step every half-hour when an electromagnet 207 receives a pulse from the clock mechanism 300. At the end of eightyfour hours, the support 202 is spring-returned to initial position. To cater for both day and night shifts, these arrangements are all duplicated, the two supports 202 through their racks 201 being lowered step-by-step during alternate twelve-hour periods. The supports 202 have projections 205 to correspond with recesses 206 in the bottom edge of the cards, their disposition being characteristic of a day shift or a night shift. If, e.g., a card 1 is inserted into guide 114 through slot 112, then, if recesses 206 in the card are not obstructed by projection 205, the card causes switch 203 to close. If now a lever 45 is moved to right or left for clocking-off or on, outer and inner guide-boxes 26, 7 are moved together towards micro-switch 48, Fig. 6, or 47 (not shown). In either case a circuit for electromagnet 27 is completed, the inner guide-box 7 is moved relative to the outer guide-box 26 and the projection 23 of the drum 4 facing the assembly of punches 107 forces the corresponding punch through the card into the die 108. The prior movement of the outer guide-box causes the drums 3, 4 and punch and die assembly to shift a small amount either side of an inoperative basic position. Thus, the punched hole not only indicates time by its general position but indicates clocking-on or -off by the direction of its displacement from the basic position. In one modification the drums 3, 4 each have twelve projections 23 and the electromagnets 17, 27 are pulsed every five minutes and hourly, respectively. In another modification, Figs. 8 to 19 (not shown), a single drum and punch assembly is used for both day and night shifts. The drum has twelve projections for selecting from twelve punches and is stepped round at five-minute intervals, while the card support is lowered a step every hour. To prevent waste spaces on the cards due to the lowering of the support by night and day, while the card is used only for day or for night shifts, after each twenty-four downward steps the support is raised the equivalent of twelve. To ensure the use of the right type of card in any shift, the two projections on the support are replaced by one fixed projection and one movable automatically every twelve hours from a position to suit the card recesses of the appropriate cards. The slight displacement of the punch mechanism for indicating " on " or " off " is caused directly by push knobs on the ends of the outer guide-box instead of through the rack-and-pinion operated by the lever 45.