Patent GB-587836-A (GB)
Title: Improvements in or relating to paper feed mechanism for accounting and like machines
IPC: B41J11/36
Filed: 1945-01-19
Abstract: 587,836. Typewriters &c. REMINGTON RAND, Inc. Jan. 19, 1945, No. 1631. Convention date, Feb. 17, 1944. [Class 100 (iv)] [Also in Group XIX] A paper-feed mechanism for a power-driven accounting-machine comprises a unidirectional gear-train from the power-drive to the platen cylinder, excluding axiallyreciprocating elements, and including a one-revolution clutch which is open normally and has associated therewith one or more driving-members to determine the extent to which the driving- mechanism rotates the platen, record card controlled means being provided to determine the operation of the clutch and its associated driving-member or members. The clutch makes one rotation in less than a machine cycle, and the drive members are selectively controlled by the machine each to engage a " line " disc to permit the platen to be driven for a long feed as opposed to the ordinary line-space ratchet feed of the platen. As shown, the invention is applied to the record-controlled tabulating-machines described in Specifications 523,532 and 555,823, [Group XIX]. For the long feed, the shaft 56, Fig. 2, of the platen 57 is rotated by undirectional gearing from a motor. A belt 63 drives through worm and bevel gears the main shafts 60, 61, 62 and the shaft 65, the latter driving through bevel gears, universal joints 107, 108 and worm gears 104, 105 the main paper feed drive shaft 103. A clutch disc 110, Figs. 2 and 13, fast on shaft 103, is adapted to drive a pinion 113 through a clutch device, the pinion 113 driving the platen 57 through pinion 115, shaft 116, bevel gears 117, shaft 118, and bevel gears 120. The shaft 103 completes one rotation whilst the main shafts 60, 61, 62 of the machine have only rotated 300 degrees. The clutch device between the disc 110 and pinion 113 comprises a disc 111, a clutch dog 112 thereon, controlled by a trip pawl 148, adapted to engage the rotating disc 110, and a drum 172, Fig. 8, comprising several " line discs co-operating with pawls 182 to determine the amount of rotation to be given to the pinion 113. The disc 111 is registered in stop position by a detent. The dog 112 can be tripped by a link 153 to allow rotation of the disc 111 to start the feed, means in the form of a cover disc adjacent the disc 110 being provided to ensure the feed is not started at the wrong time, and one of the pawls 182 which are attached to the disc 111 engages one of the discs of the drum 172 to feed the paper. The drum 172 is detachable from the shaft 103, and has three notched " line " discs 175, 176, 177 secured together and to the pinion 113. The first disc 175 is controlled from the " total trip " shaft 199, the second disc 176 is controlled by the sensing of the control hole in the last of a series of control " heading cards," and the third disc 177 is for use when the number of items to be printed equals or exceeds the capacity of the form to be printed. A tripping- lever 192C, Fig. 10, prepares for a long paper feed at the end of a form. It is adapted to trip a latch 185, Fig. 13, which holds the driving pawl 182 of the disc 177, and is arranged to be actuated by a cam 212 on pinion 113 in the act of feeding the paper to the last printing line. The cam acts on a release lever comprising two parts 214, 215 which engage resiliently a pin 216 on the lever 192C. The printing of the total only on a new form can be prevented if necessary, and arrangements made so that the items from the last card'are also printed on the new form. In the case, for example, where there are fifteen item lines on a form and the card group contains fourteen cards, the 14th card is sensed in the last half of the cycle in which the 13th card is printed resulting in a cam shaft in the " total taking " control pulling a " credit balance " shaft which is connected with a shaft 220, Fig. 10. This shaft has an arm 221 adapted to act on the lever 215 to release the pin 216 whereby the lever 192C is released and the disc 177 cannot be rotated to feed the paper, so that the total will be printed on the 15th line of the first form. If, however, the 15th card is of the old designation the machine will execute a blank cycle in-which the paper will be fed to the first item line of the next form. The lever 192C can rock a " capacity " shaft 223 which rocks two latches through levers having pins engaging slotted links secured to the latches. A shaft 231, Fig. 8, which is rocked to restore the stops which arrest the type-bars, has secured thereto an arm carrying a pin which passes through a slot in a link 230 to be engaged by one of the latches, the arrangement being such that when the shaft 223 is rocked by the lever 192C, and when the shaft 231 is subsequently rocked, the link 230 is lifted and latched until the shaft 223 returns to normal. Where there are fifteen or more cards (items) in a group, in the 14th cycle the 14th item is printed in the first half of the cycle, and in the second half the 14th item is added, the 15th card sensed, the paper line-spaced to the 15th or extra line, causing cam 212 to rock trip lever 192C. This engages release link 153 to release pawl 182 for engagement with line disc 177. It also pulls capacity shaft 223 to set the latches which enable the link 230 to be lifted and retained on the subsequent operation of the shaft 231 which prevents rise of type-bars, and locks the card picker and card stop. In the 15th cycle there is thus no printing and feeding of cards, the 15th card remaining in the sensing-chamber, but a pawl restoring arm 200 restores the feed pawl 182 which contacts the disc 177 which is rotated subsequently when the disc 111 is allowed to rotate. In the 16th cycle the rotation of the disc 111 and the paper feed is completed in the first half, the lever 192C and capacity shaft 223 returned to normal, whereby the machine prints the 15th item on the first item line of the new form. In the case where there are just fourteen items in a group, the 14th cycle is the same, except that the 15th card, then sensed, is of a new group, and the total control shaft 218 (not shown) is rotated to effect rocking of the " credit balance " shaft 220, so that arm 221 trips lever 215 to release lever 192C. The capacity shaft 223 thus returns to normal releasing its latches to nullify the blank stroke devices. The 15th cycle is a blank cycle due to the action of the, totalling mechanism. In this cycle the arm 200 restores the pawl 182 which is latched but the clutch release link is operated idly during the total taking operation. Line-spacing may be varied or stopped under certain conditions by the long feed mechanism. The extent of line space is normally regulated by the setting of a stepped plate 90 (not shown) which controls the movement of the pawl which engages the ratchet of the platen 57. A shaft 82, Fig. 8, which is rocked to effect line-spacing has an arm 290 secured thereto having a pin 291 which co-operates with a stepped arm 292 connected to the credit balance shaft 220. When the shaft 220 is rocked by the totalling-mechanism line-spacing is prevented on the blank stroke. A cam 300 on the pinion 113 can also control the stepped arm 292 to cause a change temporarily from double to single line-spacing in the headings of the forms. The pin 291 can be withdrawn manually by manipulating a plunger 307, Fig. 8, when control of linespacing by the long feed is not desired. The pinions 113, 115, together with the " line " drum 172 are detachably mounted to facilitate change of gearing when forms of different lengths are to be used in the machine. The bearings of the bevel gears 117, 120, Figs. 2 and 8, are mounted on the end of the papercarriage to enable the carriage to be set in different positions, the shaft 116 being of polygonal cross-section and splined to the relatively stationary portion of the gear train.