Patent GB-713695-A (GB)
Abstract: 713,695. Cash registers; zeroizing-mechanism. NATIONAL CASH REGISTER CO., Ltd. Jan. 12, 1953 [March 13, 1952], No. 6505/52. Class 106 (1). [Also in Group XVI] A cash register comprises, a record-material feed roller rotated at each machine operation, mechanism which operates during machine operations under the control of certain control keys to engage a pressure roller with the feed roller during a part only of the rotation of the feed roller, a second mechanism to engage the rollers for a longer period to feed the record material to a greater extent, a cam for actuating this second mechanism, and a member directly actuated by a certain other control key to couplethe second mechanism to the cam for actuation thereby. Specification 651,626 is referred to. Keyboard-When an amount key 1, Fig. 3, is depressed, a stud 6 therein engages a corresponding slot in a slide 9. which is thus raised as shown to block depression of the other keys in the same order. At the same time, an ear 14 of the slide 9 is moved from a surface 15 of a lever 16 carrying a zero stop 21 which is moved to the ineffective position shown by a spring acting on the lever 16. Near the end of an operation, fingers 19 are momentary rocked counter-clockwise to restore the operated levers 16 to permit restoration of the slides 9 and consequently of the keys The ears 14 maintain the levers 16 in their normal positions. Three clerk's keys 120, Fig. 13,   and a "total" key 121 are insertable in lock cylinders, depression of any of which starts the machine as describedbelow. The " total " key is used to print a manually-computed total and to issue a voucher. Amount differential mechanism.-A rod 36, Fig. 3, is carried by arms pivoted on the main-shaft 26 and rocked by cam means during each cycle through about 90 degrees to move the rod 36 into the position shown. The rod is initially engaged in a notch 35 in a coupling pawl 28 pivoted on an arm 25 rotatable about the shaft 26. A latch 23 also pivoted on the arm 25 is normally held by a spring 29 connecting it with the pawl 28 so that surfaces 32 and 33 of the latch and pawl are in contact. The rod 36 thus rotates the arm 25 until a finger of the latch 23 engages either the zero stop 21 or a stud 6 in the depressed key. The latch is then rocked and a stud 34 therein enters a corresponding notch 95 in a fixed plate. This movement of the latch permits the spring 29 to rock the pawl 28 beneath the latch to the position shown, thus releasing the rod 36 to complete its stroke. During the return of the rod 36, the pawl 28 is engaged thereby and the pawl, the latch 23 and the arm 25 are restored. Item-indicators 70, Fig. 3, are positioned by a toothed segment 68 operated by a minimummovement device comprising a link 71, connected to a link 73 which is pivoted at 74 to the differential arm 25 and is moved against a hub on the shaft 26 by a cam-controlled arm 90 while the arm 25 is in its differential position. Starting mechanism.-When one of the control keys 120 or 121, Fig. 13, is depressed, a stud 123 in the lock cylinder engages a corresponding cam slot 124 in a segment 125 which is thus rocked. The segment rocks an arm 132 to remove an ear 133 thereon from a projection 134 on a lever 135. A spring 137 rocks the lever 135 which is coupled to a shaft 141 carrying a motor-switch operating arm 142 and a release arm 115 for a one-revolution clutch, Fig. 15 (not shown), connected between the electric motor and the mainshaft 26. Near the end of the operation, a stud 149 in a gear 150 on the main-shaft restores the lever. 135 so that a spring 152 is able to restore the segment 125 to release the depressed control key. If the key is held depressed, a pawl 156 on the lever 135 moves over the ear 133 when the lever 135 is restored to prevent a second release of the lever 135. lnterspersed totalizers.-An intermediate wheel 81, Fig. 3, in each denomination meshes with a pinion 160 fast with a sleeve 161, Fig. 11, on which are rotatable three totalizer wheels 83. The three totalizers correspond with the three clerk's keys. The shaft 164 on which the sleeves 161 are rotatable has an annular groove 165 for each denomination in which is rotatably mounted a coupling member 163. A plate engaged in a similar groove is secured to a slide carrying a roller engaged in a cam slot in a drum controlled by a differential arm similar to the arm 25 of the amount differential mechanism but controlled by the control keys. The shaft 164 is thus positioned longitudinally in accordance with the control key depressed, and the coupling members 163. are moved into engagement with internal teeth formed on the selected totalizer 'wheels. A shaft 1194 is moved longitudinally with the shaft 164 and by engaging between teeth of wheels 235 meshing with the totalizer wheels 83 locks those of the latter which are not selected against rotation; Cut-away portions 238 permit rotation of the selected wheel. Addition.-Segments 80, Fig. 3, connected by links 78 to the differential arms 25, are pivoted on a rod 195, Fig. 17, supported by several arms 196 on a shaft 197. Each arm 196 co-operates with a pair of cams on the main-shaft 26 so that prior to the setting of the differential arms 25, the arms are rocked to move the segments 80 into engagement with the intermediate wheels 81. The arms 196 are restored before the arms 25 are returned. Control lock.-A key 212, Fig. 13, is insertable in a lock 210 and settable from a normal position permitting item-entering operations to clockwise and counter-clockwise positions. In the counter-clockwise position, a pin 213, Fig. 18, in the lock holds a lever 215 so that a roller 218 therein blocks rocking of the starting lever 135 to prevent operation of the machine. When the key is rocked clockwise,.the pin 213 moves in a slot in a lever 220 to rock the lever, and through links 222, 225, a plate 226 which rocks to an ineffective position a shutter 230 normally concealing the totalizer wheels 83. A cam 224, on which the links 222, 225 are pivoted, is also rocked to control the re-setting of the totalizers as described below. Re-setting totalizers.-If a machine operation is initiated by depression of a clerk's key 120 Fig. 13, with the control lock 210 in its clockwise position, the corresponding totalizer is automatically re-set. A partially-toothed gear 244, Figs. 11 and 20, rotated through one revolution during each operation carries a pawl 247 controlled by the cam 244 (see also Fig. 18), associated with the control lock, so as normally to be ineffective. However, when the lock is in its clockwise position, the cam 224 permits a spring 250 to rock the pawl during the rotation of the gear 244 so that it engages a plate 243 fast with a partially toothed wheel 242 which is consequently rocked and then rotated by the teeth on the gear 244 through one revolution. A gear 240 fast with the wheel 242 meshes with a gear 239 keyed on a shaft 232 moved axially with the shafts 164, 1194 by the totalizer-selecting mechanism to align notches 233 therein with the gears, 235 associated with the selected totalizer. During the rotation of the shaft 232 the notches pick up pawls mounted on the gears 235 and so restore them and the associated totalizer wheels to zero positions. Printing mechanism.-Each of the differential arms 25 Fig. 3, associated with the amount banks and the similar arm positioned under control of the control keys, is toothed and meshes with a gear 85. The gears 85 are connected by a set of nested tubes to corresponding gears 203, Fig. 7, meshing with type wheels 205 for printing the amount and a number identifying the clerk or a symbol representative of a "total" operation on a voucher strip, and with further type wheels (not shown), for printing on a record strip. Further drive gears position type wheels to print a consecutive number and are operated m a known manner not described. The voucher strip 253 also passes betweencylindrical platen 254 controlled as described below and an electro roller 255 for printing constant matter. Printing from the type wheels 205 on to the voucher strip is effected by a platen 256 on a hammer 259 pivoted to an arm 260, see also Fig. 8. A stud 262 in this arm engages a slot in a slide 263 in which normally engages a stud 269 in a cam-controlled lever 270 which operates the printing hammer. However, a hand lever 271 may be rocked forwardly to rock an arm 266 rigid therewith and engaging a stud 265 in the slide 263 which is thus moved rearwardly so that the stud 269 in the lever 270 no longer engages the slide. The hammer will not then be operated. Voucher feeding and issuing,-The voucher strip 253, Fig. 7, is fed by a roller 279, see also Fig. 8, geared to a partially-toothed wheel 274 on the main-shaft arranged so that the roller is rotated prior to printing and again after printing. A pressure roller 281 co-operates with the feed roller and is mounted on a plate 282 controlled by a link 284 flexibly connected to an arm 286 of a yoke 287 against which a plate spring 292 urges a yoke 291 fast on a shaft 288. The yoke 287 carries the platen 254 which co-operates with the electro roller 255. In item-entry operations, a stud 295 in the wheel 274 momentarily rocks a lever 297, a a hooked arm of which engages over the shaft 294 of the platen 254 and so rocks the yoke 287. Thus during the initial rotation of the feed roller 279, the pressure roller 281 is made effective to advance the strip by a single line-space. In a "total." operation, an extension 301 of the "total" key-rocks an arm 303 so that a roller 307 thereon is engaged by a box, cam 309, on the main-shaft. The cam rocks the arm 303 further and holds it in rocked position. The arm 303 is connected to the shaft 288 by a lost-motion coupling 304, 305 so that the shaft and yokes 291, 287 are also rocked and then maintained in) a rocked position. The voucher strip is thus fed s