749,125. Calculating-apparatus. VICTOR ADDING MACHINE CO. July 27, 1953 [Aug. 5, 1952], No. 20765/53. Class 106 (1). [Also in Group XVI] In a calculating machine which effects cycles of operation in each of which a multi-digit number is printed, prints are made from a single set of type on a plurality of paper strips which are linespaced together, and in operations under the control of a certain control key at least one of the strips is additionally advanced by a variable amount sufficient to bring the total advance, in a sequence of operations concluding with one under the control of the said control key, to a predetermined constant amount. Printing. Levers 28, Fig. 1, differentially positioned under the control of corresponding. denominational banks of number keys, pivotally support type bars 36 and are aligned during printing by a bar 34 carried between arms 68. As the arms 68 complete their movement, lugs 72 of latches 6'2 carried by a rod 64 mounted between the arms 68 engage the aligning teeth of the levers 28, except where a lever remains in the zero position, and are rocked to release hammers 56 which, through levers 46, force the type bars against a roller platen 44. Significant zeros are printed, each latch 62 having for this purpose an ear 79 co-operating with the lug 72 of the next higher order latch. Printing is effected upon an audit strip 80 retained in the machine, a partially pre-printed ticket or voucher drawn from a folded strip 114 in a container 116, and a slip inserted in a guide 132. Consecutive numbers are printed as described below. Ink ribbon. A strip of expendable carbon paper is fed with the audit strip. An ink ribbon 124, 134 passes from a spool on the right of the machine, between the guide 132 and the ticket strip, round an idler pulley, between the guide 132 and the type bars and on to a second spool also on the right of the machine. Paper feed. The audit strip 80 passes from a supply roll on a rod 82, between a shield 85 and the platen 44 and, over a marking table 94 and the supply roll, to a take-up roll 102 frictionally driven by the platen. Pressure rollers 86 act on the strip. The platen is linespaced by a pawl 172, Fig. 5, which co-operates with a ratchet wheel fast with the platen and which is carried by a lever 164 rocked by a link 160. A stop-stud is inserted in one of a pair of holes for engagement by a corresponding shoulder of the lever 164 to limit the idle movement of the pawl so as to cause either single or double line-spacing. A similar mechanism advances a ratchet wheel free on the platen shaft 175 but fast with a thumb-wheel and geared to a shaft 128 having knurled portions which serve as feed rolls for the ticket strip. The strip passes over a guide 118, Fig. 1, and beneath a shield 120 where it is held against the feed rolls by pressure rolls 130. The strip is further guided by fingers 122 beneath a tear-off bar 96. On depression of certain control keys, a hooked link is lowered into the path of a stud in an arm rocked during each cycle. The link is consequently moved and rocks a shaft 226. A pawl 234 carried by an arm 232 on the shaft 226 raises a link 218 to rock a lever 244 controlled by a toggle spring 246. Later in the cycle, a lever 142, rocked clockwise by the mainshaft to allow the link 218 to rise, is restored and returns the link 218, at which time a pawl 252 carried by the lever 244 picks up one of four studs 256 in a gear 210 to advance the gear to a predetermined position. The gear 210 drives the feed-roll shaft 128 and in this way the ticket is advanced to its tear-off position irrespective of the preceding number of line-spacing operations. A flat shaft, Fig. 4 (not shown), may be rocked in either direction by a hand-lever to rock the frames carrying the pressure rolls 86, 130 for the audit and ticket strips respectively to inoperative positions. Printing consecutive numbers. Type wheels 270, Fig. 5, are arranged to print the date, an identification symbol and a serial number in each operation in which the ticket strip is advanced for tearing off. In such an operation, an arm 284 fast on the shaft 226, referred to above, is raised out of blocking association with a stud 286 in one of a pair of arms 274 carrying the type wheels. Initially, however, a pawl 292 carried by a lever 306 follows the arm 284 and blocks the stud 286. The lever 306 is then rocked counter-clockwise by an arm 300 on the mainshaft and a tail of the pawl 292 engages the hub of the arm 300 so that it finally releases the arms 274 to the action of a spring 278 to cause a print to be taken. The arms 274 are restored on the return of an arm 280 rocked by the mainshaft. The serial number type wheels are advanced one unit during each operation by the release of a link 322 due to rocking of a plate 316 by the lever 306. The link is positively restored by the plate 316. Depression of a repeat key 22 rocks an arm 366 so that a stud 372 therein blocks movement of the link 322 and consequently prevents actuation of the counter.