782,622. Selective punching machines. INTERNATIONAL BUSINESS MACHINES. CORPORATION. Dec. 16, 1955 [Dec. 24, 1964], No. 3610&/55. Class 31 (2). A card-punching machine comprises perforating means adapted to move in one manner in unison with moving cards to be perforated and in a second manner between perforating and non-perforating positions, actuating means rotatably movable in unison with movements of said perforating means in the first manner and including plural actuators effective upon selection to actuate said perforating means between said perforating and non-perforating positions thereof, and means for selectably interconnecting said actuators and said perforating means to effect selectable cycles of perforation operation. Cards supplied from a hopper are each moved along guides 10, 11 past one or more sensing stations formed by an electrically conductive roller 13 and contact brush 14 by means of driven feeding rollers 12, 12a. The card is then engaged by a feeding roller 17 which is geared to drive the card at greater than, e.g. twice, normal card velocity and is reciprocated laterally one in each card cycle. This lateral reciprocation in conjunction with the angular positioning of co-operating idler rollers 18 produces lateral shift of the card against one side of the card guide thereby aligning one edge of the card as the latter moves to the punching station. The roller 17 is provided with a circumferential groove 85, Fig. 3, engaged by pins 90 provided on the upstanding arms of a saddle 91 movable with a plate 92 which is reciprocated by a pin 96 engaged by a grooved cam 93 on a shaft 94 geared to a drive shaft 75. The remote end of the shaft 94 is journalled in a stud 98 formed with a stationary sun gear 99 engaged by a number of pinion gears 100 which also engage a movable sun gear 102 formed on one end of a sleeve 103 rotatable about the shaft 94. The rotation of the sleeve 103 is transmitted to the roller 17 through a pin and slot connection 105, 106. As the card leaves the rollers 17, 18, its leading edge engages stop fingers 19 projecting from a feed roller 20a and passing between circumferential grooves provided in a co-operating feed roller 20. The rollers 20, 20a move the card to the punching station at normal card velocity. Each punching station includes a frame 25 supporting a roller 33 which is engaged by cams 34, 35 to oscillate the frame pendulum fashion about a pivot 26. A punch 29 is reciprocable in the frame 25, the lower end of which carries a die 31 which is supported during the punching operation by a roller 32 which is grooved to facilitate the removal of chips. The punch is pivotally connected to a pivotally-mounted rocker arm 38. A reamer shaft 43 rotating at angular velocity corresponding to the card velocity is provided with lobes 44 which engage an interposer 45, whenever the latter is moved into the path of the lobes, to establish a driving connection between the reamer shaft and a projection 47 on the rocker arm 38. This driving connection moves the rocker arm downwardly to drive the punch through a card to be perforated. The rocker arm 38 is restored both by springs 40 and by the action of a reamer lobe engaging a projection 48 on the rocker arm. The interposer 45 is pivotally supported on one end of an arm 50 of a pivotally-mounted spring-influenced bellcrank 51. The arm 50 has a projection 53 which is engaged by the lobes 44 of the reamer shaft 43 to move the arm 50 to the non-interposing position of the interposer 45. In this position, the other arm 54 of the bell-crank 51 latches on to the lower end of an arm 55 of a latching pivotally-mounted spring-influenced bellcrank 56. The other arm 59 of the bellcrank 56 is engaged by the lobes 60 of a second reamer shaft 61. Each engagement of the arm 59 with a lobe 60 tends to latch the bellcranks 51, 56. The latter are unlatched to initiate a punching cycle by energization of an electromagnet 68 an extension of the armature 67 of which is connected to a latch bar 64 having a pin 65 which engages a groove 66 at one end of the bellcrank 56. Operation.-A punching cycle is initiated when the bellcranks 51, 56 are latched. Rotation of the reamer shaft 43 causes one of its lobes 44 to strike the projection 53 of the bellcrank 51 to relieve slightly the latch point between the bellcranks. The electromagnet 68 is now energized to unlatch the bellcrank 51 which moves in a clockwise direction to move the interposer 45 into the path of the lobe 44 which previously relieved the latching of the bellcranks. When the lobe engages the interposer, the rocker arm is rotated to drive the punch through the moving card. The punch moves with the card by virtue of the rocking motion imparted to the punch frame 25 by the cams 34, 35. Immediately after, that lobe of the reamer shaft which immediately precedes the actuating lobe engages the projection 48 on the rocker arm and co-operates with the springs 40 to restore the rocker arm and punch to the non- perforating position of the latter. At the same time, that lobe of the reamer shaft which immediately succeeds the actuating lobe engages the projection 53 of the bellcrank 51 and restores the interposer 45 to its non-interposing position. At this position, a lobe 60 of the reamer shaft 61 engages the arm 59 of the bellcrank 56 to ensure latching of the bellcranks 51, 56 immediately on movement of the last-mentioned lobe out of engagement with the projection 53 on the bellcrank 51. The bellcranks thereupon move into latching engagement unless the electromagnet 68 is again energized. At the end of the downward stroke of the punch and just after the punch starts on its return upward stroke, the punch frame is oscillated in the reverse direction so that the punch is positioned above the succeeding index point of the card. Specification 624,597 is referred to.