Patent GB-245998-A (GB)
Abstract: 245,998. National Cash Register Co., Ltd., (National Cash Register Co.). May 1<2>, 1925. Cash registers with item-printing mechanism; column printing.-Items such as those involved in banking transactions are printed upon an inserted sheet in appropriate columns selected by the transaction keys. There are as many groups of type wheels as columns, and after all the groups have been set they are given a quarter turn and one group is selected and swung up to print. As shown applied to a machine of the kind described in Specifications 8119/15, 172,584, 176,781, 191,350, 191,351 and 193,850, groups of type wheels 330, corresponding with the columns on the sheet 416, Fig. 21, and with the bank of transaction keys, are mounted in yokeshaped carriers 332 suspended from a shaft 337 and tending to revolve clockwise, Fig. 8, under the action of springs 4091. The wheels are normally in engagement with racks 314 geared with the amount differential mechanism so that all the groups are set simultaneously to the amount to be entered in the machine. The shaft 337 is supported by arms 340 from a shaft 341 which, after the setting has taken place, is rocked by cam means to raise the type wheels from engagement with the racks. Thereupon the carriers are rotated through 90‹ by a rack a, Fig. 11, slidably mounted in a stationary frame member 311 and engaging pinions 339 forming part of the carriers. The rack is shifted to perform this operation by a drum cam 377 mounted on shaft 349. The carriers 332 are normally prevented from swing- ing on. the shaft 337 by catch levers 390 pivoted to pitmen 436 slotted to embrace pins 439 on arms fixed to shaft 341. When this shaft rocks to raise the type wheels the pitmen are swung inwards and a lug 437 on one of them engages a cam projection 387 on a corresponding segment 386 secured to a shaft 385 rotatively set by the differential mechanism of the transaction bank. These projections 387 are differentially placed upon the segments so that only the desired pitman is engaged and is lowered to free the corresponding type wheel group, which thereupon swings to strike the type against the sheet wound around a platen roller 427. The group is restored to normal position by cam mechanism rocking a lever loose on shaft 341 and thereby an arm fixed to the shaft 337, projections on which co-operate with the various group carriers. Aligning for impression. The setting racks 314 are aligned by a blade 319, Fig. 8, rocked into and out of engagement by cams on the main shaft 62. The type wheels are aligned and held when disengaged from the racks by a blade 362, Fig. 10, slidably mounted in the carrier. The blade is normally pressed downwards by arms secured to a spring-controlled shaft 367, but is disengaged from the type wheels by a stationary abutment acting through a sliding plate on the carrier. The selected group is prevented from rotating when away from the rack a by means of an aligning arm 411, Fig. 8, which is mounted under spring control on shaft 337 and engages the pinion 339 during its removal from the rack. The arm is prevented from following the pinion into normal position by a stop pin 415 abutting against an arm 413 connected with the arm 411. Paper carriages. The roller 427, Figs. 8 and 13, around which the sheet is wrapped is mounted in plates 425 pivotally carried by arms 423 of a carriage 417 running on ball bearings 418; the sheet is held by auxiliary rollers 430, 431 and by a guide plate 433. The roller is rotatable by knurled discs on its ends and is automatically stepped for line-spacing by pawls engaging ratchet wheels on the drum. These pawls are actuated immediately prior to the impression by mechanism similar to that used for releasing the type wheel carrier and including a pitman 436, Fig. 8, co-operating with a fixed lug on the frame so as to acquire a downward movement converted into an oscillation of the pawls by means of levers 442, 445. 'To facilitate adjustment of the, sheet on the platen roller 430 the roller 430 may be disengaged by rocking a sleeve 461 supporting the arms carrying this roller by means of finger pieces 460, extensions 462 of which cause simultaneous rocking of a shaft 464 provided with arms 465 controlled by springs 466, serving thus to restore the parts when released by the operator's fingers. To raise the platen roller for exposing the impress the arms 465 may be raised to free hooks 490 from pins 491 on the arms 423 so as to enable the roller-supporting plates 425 to be rotated about their pivotal axis 424. Column-printing arrangements. In addition to the column selection described above, printing may be effected in either of two sub-columns b, c, Fig. 21. by arranging for the carriage to be capable of limited lateral movement. The carriage is notched at 497, 498, Fig. 5. to be engaged by a spring-controlled bell-crank 495, and an interlock is provided at 502 between this bellcrank and the release shaft 84 of the machine precluding movement of the one unless the other is in normal position.