Patent GB-388775-A (GB)
Abstract: 388,775. Cash registers. NATIONAL CASH REGISTER CO., Dayton, Ohio, U.S.A.-(Assignees of Shipley, B. M. ; 2021, Catalpa Drive, Dayton, Ohio, U.S.A.) July 24, 1931, No. 21166. Convention date, July 24, 1930. [Class 106 (i).] Voucher-issuing.-A printing-mechanism for a cash register or similar machine of the key set and operated type comprises a platen adapted to be pressed positively against type elements, paper-feeding means, ink-ribbon feeding and reversing means and paper-severing means, all operated by a shaft, rocked by the key-coupler, through a cam, a segment, an arm, and a pitman, respectively. Differential mechanism.-The banks of amount keys operate through differential mechanisms and minimum-movement linkages of the kind described in Specification 251,650, [Class 106 (i), Calculating &c.], to angularly position shafts 54, Fig. 6. The transaction keys 35, Fig. 2, through their cam slots 76, bail 77, and lever 78, position the lower end of a beam 87, the upper end of which is pin-andslot connected to a toothed sector 91. A roller 86, carried by an arm 85 of the keycoupler shaft 45 co-operates with the beam to adjust the sector and angularly position a shaft 94, Figs. 2 and 6. Type-wheels setting. The type-wheels 99, Fig. 6, for printing the transaction and amount are freelv mounted on a tube 137 and are connected to the differentially-set shafts 94, 54 through sectors 103, rack-bars 104, pinions 108, and wheels 109. Consecutive-numbering wheels and manually-set dating-wheels are also .mounted on the tube 137. The type-wheels 99 with their setting-wheels 109 &c. form a complete unit that is removable from the machine with a portion 132 of the side frame. Hammer-impression mechanism. The platen 185, Fig. 3, is actuated from the key-coupler shaft 45, Figs. 2 and 3, through a cam 219. The cam is normally latched by a spring arm 220 to an arm 217, connected by a link 215 and arm 85 to the shaft 45. Towards the end of the clockwise movement of the cam, a rise on the cam co-operates with a roller 231 to rock a shaft 212 and press the platen towards the typewheels. Meanwhile, a pivoted catch 252 on the cam rocks an arm 253 to press an electrotype bar 250 towards a fixed platen 256. The type-wheels are aligned, before the impression is made, by an aligner 235, Fig. 6, operated by a slot 238 in the cam. The impression mechanism may be disabled bv a lever 260 that rocks the latching arm out of engagement with the arm 217 to disconnect the cam from the key-coupler. Voucher strip, feeding. The strip 234, Fig. 12, is fed from a roll 265 by rollers 268, 269, Figs. 9 and 12, the lower of which are rotated by the key-coupler shaft 45 through a cam 47, lever 56, link 274, toothed sector 275, and ratchet mechanism. When the lever 260 is actuated to disable the impression mechanism, an arm 263 thereon rocks the link 274 to position a stud 276 at its upper end within an arcuate slot in the lever 56 and thus disable the feed mechanism. Voucher strip, severing. The severing knife 302, Fig. 12, is connected through a pitman 299 to a lever 298 mounted on the key shaft 36. At the beginning of an operation, the knife is raised by the abutment of a projection 296 on the key-coupler trunnion 57 against an arm 297 of the lever 298, and is held in raised position by a latch 304. At the end of an operation, the key coupler disables the latch and allows the knife to fall under the action of springs. Voucher strip supply roll, replacing. The platen mechanism and upper feed rollers are carried by arms 190, Figs. 3 and 12, and, upon release of a catch, may be rotated as a whole about studs 203 to allow a new roll 265 to be inserted. The rotation of the arms 190, through a link 333, raises the knife 302, the latter being held in raised position by a latch arm 351 until the depression of a key causes a stud 322 on the key-coupler to abut and disable the latch arm. Ink-ribbon mechanism. The ink ribbon is carried by spools 340, 341, Figs. 15 and 16, having ratchet wheels 359, 360 operated upon alternatively by pawls 357, 358 situated at the opposite ends of a lever 355, 356. The lever is carried by a shaft 354 mounted in a plate 347 that is given a to-and-fro motion by an arm 344 on the key-coupler shaft 45. The spools are of the collapsable type described in Specification 231,868, [Class 100 (iv), Typewriters &c.], and when one is empty it allows one of a pair of levers 373, 374 to rise and intercept an arm 364 of the lever 355, 356, whereby the direction of movement of the ribbon is reversed. The Specification as open to inspection under Sect. 91 comprises also the construction of hammer-impression mechanism forming the subject-matter of Specification 389,841. This subject-matter does not appear in the Specification as accepted.