Patent GB-102409-A (GB)
Title: Improvements in Foot Pedal Operated Perforating Machines.
Inventor: POWERS JAMES
Filed: 1916-02-14
Abstract: 102,409. Powers, J. Feb. 14, 1916. Selective punching-machines.- A punching-machine for perforating cards for accounting- machines comprises a stationary keyboard, a number of rows of punches in a reciprocating frame, a corresponding number of settable pins for actuating the punches, and a movable carriage having a single row of setting-pins registering successively with the rows of settable pins. The setting-pins in the carriage are actuated from the keyboard to position a selected settable pin in each row, so that on the reciprocation of the punch-carrying frame after the desired pins have been set, the punches corresponding to the selected pins will operate. The carriage is moved step bv step by an escapement mechanism mounted upon it. The punches 30 have heads 31 resting on a fixed plate 32, and pass through holes in a guide-plate 29, which, with a perforated bottom plate 28, is mounted in a reciprocating frame 27. The card to be perforated is positioned on the tray 35 of a slide 33, which is moved to place the card on the plate 28 by means of a band 38 passing round a spring drum 37. The frame 27 is reciprocated by a treadle 22 acting through an arm 21, rock-shaft 19, arm 17, sliding shaft 11, and cams 15 engaging with rollers R. The settable pins 40 are normally held up by springs 43, but when depressed by the actuation of a setting-pin 70, the pin 40 is locked in the depressed position by the engagement with a recess in its side of a projection 49 on a sliding plate 45. A locking-plate 45 is provided for each row of pins 40 and is kept to its work by a spring 48. After the punching operation, all the plates 45 are moved to free the depressed pins 40, by a plate 52 carried by an arm 53 on a shaft 54. This shaft is rocked by an arm 23, Fig. 1, on the treadle shaft 19 engaging with the eyed end of a link 56 connected to a crank on the shaft 54. As some of the perforations at the front end of the machine may represent designation-characters to be repeated for a series of cards, means are provided whereby the corresponding pins 40 are not released after every operation of the punches. The bar 52 is cutaway at the front end 58, Fig. 19, and a number of two-position stops 64 are provided in line with plates 45. So long as the stops are in the outer position, the corresponding plates 45 are not moved, and the corresponding pins 40 remain locked. in their depressed position. With the stops in the inner position, however, the plates 45 are moved every time the treadle is operated. An adjustable stopbar 126, Fig. 3, is provided by which the sliding carriage C may be prevented from travelling to the front of the machine when the pins 40 at that end have been locked for a series of cards. The sliding carriage C, carrying the single row of setting-pins 70 for depressing the pins 40, is mounted by runners or rollers 76, 79, 81, 84 upon side rails 67, 68. Selected pins are actuated by keys 109 acting through bars 104 mounted on links 103, 105. Springs 124 return the bars to normal position, and springs 74 return the pins 70. The escapement mechanism for advancing the carriage step by step comprises a spring drum 96, a ratchet 93, and a pinion 86 secured to the ratchet and engaging with a rack 85, Fig. 9. The ratchet is held by a pivoted latch 100, which is raised when a key is operated, by one arm of a pawl 9], the other arm being adapted to engage with the ratchet wheel. The pawl 91 is secured to a rock-shaft 87, Fig. 3, which has a plate 89 having an upturned edge 90 adapted to be engaged by the bars 104 when a key 109 is depressed. At the time that the latch 100 is raised from the ratchet-wheel and the pawl 91 engaged therewith, the wheel turns very slightly, so that when the latch is allowed to fall again, it comes down on the crown of the next tooth, and the wheel advances one toothspace before it is brought to rest by the latch. A spacer key is provided for releasing the carriage to allow it to run up to a previously positioned stop. The bar 104 of this key engages a plate 116 pivoted on the carriage. The end 121 of the plate engages a pin on the latch 100 to raise it to free the ratchet 93. The carriage runs until the raised end 120 of the pivoted plate 116 engages one of a number of adjustable stops 114.