Patent GB-270350-A (GB)
Title: Improvements in or relating to cash registers
IPC: G06C7/10
Filed: 1927-05-03
Abstract: 270,350. National Cash Register Co., (Assignees of Robertson, W. H.). May 3, 1926, [Convention date]. Cash registers with operating-means.-A keyset motor or crank operated machine of the type wherein the differential actuators are moved by springs when permitted by the operating- mechanism has means for preventing a too rapid operation. The indicators and type are set by the actuators through the medium of the totalizer pinions. The keyboard contains four banks of amount keys, a bank of clerk's keys and three banks of ledger number keys and each bank has a detent plate 146, locked in either position by a plate 155 rocked from the release slide 102 referred to below. The detent plates are depressed to free the keys by the rocking of a shaft 167 from the main shaft through a pitman 172. The key depression and consequent displacement of the detent also, by means of a stud 195 rocks a zero stop 193 to the left to free the differential sector 181. These sectors tend under the action of springs 185, to rotate clockwise and are normally held by a bar 186 revolved about the centre 180 by the toothed gear 188, 189, Fig. 5, rocked by cams on the main shaft 50. Alongside each differential sector 181 is a loose member 290 toothed at 291 to engage the totalizer pinions 205, and at 292 to position the indicator drums and item type wheels by means of the gears 293 and nested sleeves 294. The totalizer pinions 205 and numeral wheels 224 are mounted on a spindle 223 supported by pivoted arms 222 rocked by a grooved cam on the main shaft. When the pinions 205 are engaged with the differential sectors for the return stroke they also engage the toothed members 290 to position the indicators and type wheels to the new values, the return of these elements to the zero position having been previously effected by the engagement of the operating rod 186 with the surfaces 300. Motor operation. To free the machine for operation by the motor or by hand a release key 90 is depressed to rock an arm 98, Fig. 3, free of the flange 101 of a slide 102, a latch arm 135 also co-operating with the flange to prevent repetition of operation by maintenance of release key depression. The slide is connected with a spring-controlled shaft having a stop arm normally engaging the shoulder of a disc fast on shaft 39 geared with the main shaft of the machine. The stop arm also holds a cam plate against spring action but when the release key is depressed and the slide 102 descends the stop arm releases the shaft 39 and also the cam plate, the ensuing movement of the latter operating a switch to close circuit for the motor. Crank handle operation. After release of shaft 39 by depression of the release key 90 the main shaft 50, Fig. 3, may be driven by a crank 60. To prevent a too rapid operation of the crank handle, mechanism is provided to ensure that the differential sectors 181 have reached their value positions before the operating rod 186 starts on its return movement. For this purpose a. sector 206, Fig. 4, coaxial with the differential sectors is under the action of a spring 204 weaker, than the springs 185 actuating the sectors. When the machine is operated a pin 214 is subsequently blocked by a bellcrank 215 unless meanwhile this has been displaced by a stud 207 on the sector 206 when this has reached the end of its outward journey. The Specification as open to inspection under Sect. 91 (3) (a) contains also the following :- The release key may be locked against depression by means of a. proprietor's lock 139, the bolt of which co-operates with a lever 111 adapted to engage a notch 113 in the key plate 94. The crank handle 60 is loose on a stud 67, Fig. 13 (Cancelled), but adapted to be clutched to a member 62 loose on a sleeve 63 formed with a gear wheel 64 to drive the main shaft 50 through the intermediate pinions shown. The member 62 drives the sleeve 63 through the medium of a spring 66 attached at one end to the sleeve and at the other to the member 62. To vary the tension of the spring a washer 76 is removably attached to the sleeve by means of prongs entering holes in the washer and has a shoulder to be engaged by shoulders on the member 62. The main shalt 50 is brought to home position by a spring-controlled plunger bearing against a cam 80, Fig. 3, secured to gear wheel 74. Transfer-mechanism.-A transfer tooth 242, Fig. 16 (Cancelled), in connection with each numeral element of the totalizer depresses at transfer a latch 231 normally supporting at 237 a flange 233 of a transfer pawl 235 of the next higher denomination. The flange is thus transferred to the notch 243 so that subsequently when one of a spiral series of cams on the main shaft reciprocates the pawl it is able to engage the higher element to turn it one step. Zeroizing-mechanism.-The totalizer spindle 223 provided with the usual groove to pick up pawls on the numeral wheels, is given one rotation by a key 260 applied to the spindle and having prongs to clutch a slidable sleeve 258. The spindle is normally locked by engagement of a notch in this sleeve with a fixed lug 264 and is freed by displacement of the sleeve against the pressure of a spring 259. To prevent tripping of the transfer parts a cam on the spindle rocks arms into position to obstruct and retain the flanges 233 on the transfer pawls. The rotation of the spindle 223 by the key is restricted to one turn by means of a slidably pivoted spring-controlled lever 271, Fig. 20 (Cancelled), having a lug 274 pushed aside by a lug 275 on the key when this is inserted. As the key rotates, the lugs eventually engage and the lever is raised to its limit whereupon the spindle is in home position and the key may be removed. With item-printing mechanism; voucherissuing.-Record-strip printing type-wheels 322, Fig. 7, and voucher printing type-wheels 323 are set by the nested sleeves 294 above referred to, and are impressed by their respective hammers 417, 397, operated by cam 80. This cam rocks a spring-controlled arm 401 engaged at 399 by the spring-controlled hammer arm 396 and provided with a pin 421 to rock another arm 420 operating the other hammer. The record-strip is line-spaced by a ratchet pawl 444 carried by this arm 420 which also operates another pawl 470 to advance the ink-ribbon 455. The voucher strip passing up the shoot 357 is severed by a fixed knife 496 and a slidable knife 494 reciprocated by a cam on shaft 70, and pressed against the fixed knife by arms on a shaft under adjustable spiral spring control. This subject-matter does not appear in the Specification as accepted.