Patent GB-191220843-A (GB)
Title: Improvements in Recording or Printing Machines particularly for Recording Sales.
Inventor: HADDAN REGINALD
Filed: 1912-09-12
Granted: 1913-09-12
Abstract: 20,843. Haddan, R., [National Cash Register Co.]. Sept. 12. Type-lever machines with printing-surfaces for tickets.-Relates to receipt-checking and recording apparatus of the kind in which a sales slip is printed with the amount of the transaction and a portion thereof is similarlv printed, detached, and retained in a locked receptacle in the machine, the other portion being issued as a voucher. Type-lever actions.- There are five banks of keys, to each horizontal row of which are assigned two shafts 13, 14 arranged to enable the keys in order from the left to set the type in order from the right. This is effected by means of one sleeve on the upper shaft and two sleeves nested on the lower shaft, the inner sleeve of the latter set being halved and joined by tongue and groove 31, 30, Fig. 13. Arms on the shafts and sleeves are pivoted to the spring-pressed key spindles and to link bars 22, which are pivoted to levers 42, 43 pivoted at 40,41 and forked at the upper ends to carry two similar types. The types for one bank are divided into two sets, one to five in front and the remainder in the rear, a duplicate zero type being normally in central printing position. The type-lever as it swings up is guided laterally by fixed cams 106 into the central position so as to register with the openings in a movable chase 98, which bears on sliding replaceable holders 111 types for date, number of the machine, &c. The chase is carried by four plungers 97 moving against springs 96 and is limited in movement by a stop. The type-levers are cut out to rest against a bar 39 in the printing position. The zero typelevers are pivoted to links 48 urged by springs 50 and having cross-bars 222 engaged by shoulders 222<a>, 222<b> in the links of the significant type-levers so that on setting any key of a bank the zero type is displaced. Key interlocks.-The links 22 have cams 60 which tilt rocking-plates 57, 58 linked together so that any key locks all the rest of that bank. Linked latch plates 66, 67 latch the links and type in set positions and can be released for correcting a wrong setting by a release key 77 which rocks a shaft 72 with a blade 71 for raising all the latches. During operation of the main crank a pin 83 on the platen carriage depresses a link 81 to effect the key release through a lever 79 acting on the release-key stem. A pair of cam-surfaces on the link 81 act against the cover-plate and disengage the link from the pin 83 at the proper time. Hammer - impression arrangements; sheetcutting arrangements.-The platens 158 are of hard rubber mounted on the #-shaped crossmembers of a vertically-sliding frame 134, which carries the spindles of an ink-ribbon 155 guided around the platens and over an upper knife mounted in the frame between them, the upper knife co-operating with a knife 101 fixed in the chase. The frame is operated by double toggles at each side, the rear pair being pivoted to an eccentric connecting-rod 150, the disk of which is on the shaft of the main handle. Sheet-feeding arrangements.-The rear portion of the severed slip is delivered to a locked receptacle 201 by a feed-roller which presses the slip against a rotating roller during the upward movement of the frame 134. Ink-ribbon mechanism. -An automatic reversal mechanism for the ink-ribbon is mounted on the frame 134 and comprises a lever 161 and double pawl 163 held in either position by a spring plunger 169 to engage ratchet-wheels on the ribbon-spool spindles, the lever being rocked by a link 165 from a groove in a cam 166. A full spool bears on a roller 181 on a rocking frame which is then thrown over by a spring 174 bearing on a cam on the frame causing a projection 180 to strike a pin 164 on the double pawl and bring it into engagement with the other ratchet.