Patent GB-144367-A (GB)
Abstract: 144,367. Haddan, A. J. H., (National Cash Register Co.). March 6, 1919. Printing totals; differential mechanism; totalizing-counters.-Relates to cash registers of the type having differentially-movable actuators and totalizing elements, such as described in Specification 9400/97, and more particularly to the total calculating and printing mechanism therefor. According to the invention, each differentiallymovable actuator moves two members in opposite directions, and the corresponding totalizer is coupled with one of these members to accumulate items in adding operations, and with the other member so as to be re-set to zero in total-printing operations. In total printing, the usual typecarriers are operated by the differenbially-movable actuators under the control of the totalizers, the actuators being disconnected when their corresponding totalizers return to zero. In adding operations, the totalizer of highest order transfers, if necessary, to additional type carriers of high orders, which only print on the record strip in total-printing uperations, together with the type characters of low orders, which print in both adding and total-printing operations. The invention is described in connexion with a machine of the type described in Specification 9400/97, in which detents 21, Fig. 3, one for each bank of keys 20, are raised by the depression of a key to retain such key depressed, and are held in this position by a spring-operated sliding latch plate 17, Fig. 1, an arm 26, Fig. 3, being simultaneously operated to release a shaft 29 adapted to be driven through gearing from the main drive shaft 30, Fig. 1, provided with an operating-handle. The shaft 30, through cranks and a link 31, 32, 33, rocks a. shaft 34 carrying driving segments 36 having shoulders 37 to engage latches 38 pivoted by links 39 to the actuating segments 40 (loose on the shaft 34), which are thus moved (through a distance corresponding to the value of the key depressed) until the depressed key engages a pawl 42 to operate the latch 38 and disconnect the segments 40 from its driving segment 36. The segments 40 operate indicators 47 through gearing 45, 46, and totalizer disks 54, Figs. 8 and 10, through gearing 45, 49, 51, 55, the gears 51, 55 being temporarily coupled together by long pinions 59, Figs. 1 and 2, brought into engagement with the gears by the rocking of arms 60 fast on shafts 61 under the action of pitrnen 64 and camgrooves in disks 67 fast on the driving-shaft 30. The gears 45 ore fast to nested sleeves 70, Fig. 10, carrying printing-segments 71 for recording items and totals on a detail strip, which is fed over plates 74, 75 and is printed upon after a check strip has been printed upon and severed in known manner. In total-printing operations, the segments 40, Fig. 1, operate gearing 45, 89, 92, a gear wheel on the same sleeve as 92, and a gear wheel 96, Fig. 8, loose on the hub of the gear 55, the gear 96 rotating in the opposite direction to the gear 51, and the long pinion 59, Figs. 1 and 2, couples the gears 96, 55, and is disconnected from the gear 51, the shaft 61 being moved longitudinally to shift the pinion 59 when the machine is prepared for total printing, as described later. Each totalizer disk 54 is thus returned to zero. when a pin 110, Fig. 6, thereon, engages a shoulder 111, whereby a lever 105 through a stud 103 rocks an arm 100, thus causing a projection 113 to stop a sliding plate 115, Figs. 1 and 6, on the segment 40. The pawl 42 then engages the plate 115 to operate the latch 38 and disconnect the segment 40 from the driving-segment 36. The amount standing on the totalizer 54 at. the beginning of the operation is thus transferred to the type segments 71. The segments 40 move slightly past the zero position, but are returned by the engagement of the ends of the latches 38 with alining-notches 119. Alining-arms 122, Fig. 1, operated in known manner, hold the gears 45 and indicators and type segments in adjusted position during printing. The totalizer disks 54 are held and prevented from reversing during adding operations by ratchet-wheels 126, Fig. 6, and pawls 125, which are released to permit backward movement of the totalizer disks during totalprinting operations by the engagement of an arm on the slidable shaft 61 with an arm 129. The .means for shifting the shaft 61 to prepare the machine for total printing comprises a lock 131, Fig. 3, the key of which operates a ratchet 132 carrying a pin 134 engaging a slotted lever 136 pivoted to a link 137, which rocks a yoke 140 about the shaft 61. The yoke 140 carries a roller engaging a cam groove formed in the periphery of a segment fixed to the shaft 61, which is thus moved longitudinally. In adding operations, the totalizer wheel 54, Fig. 10, of highest order is adapted to transfer directly to additional typewheels 146 through sleeves 52, 163, a cam-groove disk 162, and a lever operating pawl-and-ratchet mechanism of known construction. The platen 75 is flattened at 174 to prevent printing from the type wheels 146 in adding operations. In totalprinting operations, however, the shaft 80 carrying the platens 74, 75 is turned through a quarter of a revolution through levers and links 175, 177, 178 from the shaft 53, which is rocked by teeth 181, 182, Fig, 3, when the link 137 is raised by the operation of the lock 131. When the mechanism controlling total printing is restored to normal position, the additional type-wheels 146 are turned back to zero by ratchet mechanism driven through a pinion and a toothed segment fixed on the shaft 53. In order to lock the keys against depression when the machine is prepared for total printing, sliding locking-plates 190, Fig. 3, are raised, by the elevation of the links 137, through levers 138, levers 199 on a shaft 196, and arms 195 on the shaft 196 engaging pins 194 on the lower ends of the plates 190. If a key is depressed, it is first released, to allow the plate 190 to rise, by the engagement of pins 203, Fig. 1, with pins 204 on the latch plates 17, which are thus drawn forward to release the depressed keys in hnown manner. When the locking-plates 190, Fig. 3, are raised, projections 206 thereon engage pins 205 to operate the detents 21, thus permitting retraction of the latch plates 17 bv the springs 18 to prepare for the operation of the machine. Means are provided for compelling a complete half revolution of the lock barrel 131, Fig. 3, in preparing the machine for total printing, and for preventing the return of the lock barrel and the re-setting of the additional typewheels 146 until after the machine has been operated. For this purpose, an arm 217 of a lever 215 comes into engagement with the ratchet 132 when the lock is turned, and is released therefrom when the machine is operated by the engagement of a stud 221 on a disk 220, fast on the shaft 29, with the lever 215. A lever 209 locks the lever 215 in this retracted position until the lock 131 is returned to normal position, when a pin 224 on the ratchet segment 132 rocks the lever 209, permitting a spring 218 to restore the lever 215 to normal position