Patent GB-191004210-A (GB)
Title: Improvements in Adding Machines.
Inventor: MEYER PETER
Filed: 1910-02-19
Granted: 1910-11-03
Abstract: 4210. Meyer, P. Feb. 19. Adding-apparatus with operating - means and printing - mechanism ; printing totals. - Relates to machines of the differentially - set independently-operated type, and more particularly to the compact arrangement of actuating and transfer mechanism on the central shaft, to the total-printing and zeroizing mechanism, and to the means for printing zeroes to the right. The setting-segments 8 carry item-printing type segments 42 and justifying teeth 26, which engage with rollers on spring plungers 28 adapted to be locked by arms 35 on a shaft 36, which is operated by a cam 39 on the main crank-shaft. A cam 93 and link 95 operate the platen roller. The setting-segments carry studs 48 on which are pivoted three-armed levers 49, the upper arms of which are engaged by raised arcs 52 on controlling-disks 21 fast with driving- wheels 22, which gear with pinions on a shaft 14, driven by gearing from the hub of the crank-handle. The central shaft 11 turns loosely in the hub of the crank, and has fast on it a pinion 16 adapted to gear with a sector 111 loose on the shaft 14. The elements for each denomination are mounted loose on sleeves 23 keyed to the shaft 11 and having four ratchet teeth to engage a pawl 128 pivoted to the totalling-wheel 20 which is fast with the checking-wheel 19 and locking-wheel 18. When a setting is made, the forked lever 49 is moved over the raised arc 52, thus lifting the second arm of the fork from engagement with the locking-wheel 18 and bringing the item digit opposite the printing point. During the first quarter-turn of the crank, the item is printed; in the second quarter, the arc 52 strikes the upper arm of the lever 49, bringing the forked end into engagement with the locking-wheel 18, which, with the driving and totalling wheels 19, 20, are turned through the amount of the item set, thus restoring the segments 8, and through gear 53 registering the item upon the total-printing wheels on the shaft 13. Controlling printing of zeroes.-Zeroes at the right of items are printed by means of typecarrying arms 87, which have overlapping bars 90, as shown in Fig. 17<a>. A total-indicating counter is also actuated from the wheels 19 and is read through slots 5, Fig. 15, beside the setting levers, an item indicator being also actuated by toothed arcs 44 on the segments 8. In a modified form of the setting-segments, a weight 139, Fig. 21, or spring throws the segment round until a spring pawl 143 engages the end of a depressed key. Each segment carries a tooth 148 to engage the pivoted holding-pawl 141 of the next lower detent plate so that all the segments to the right of the last significant figure are released and drop through one space until arrested by a tooth 149, thus setting the zeroes, which are, in the modification, carried on the type arcs opposite the printing-point. To prevent this extra movement from affecting the total, the arm of the forked lever engaging the locking-wheel is formed with a spring-controlled pawl 152, Fig. 23, which allows an idle movement of one unit. Transfer mechanism.-The transfer teeth 70, Fig. 3, are carried on the wheels of the intermediate shaft, and engage levers 66, which throw the levers 74, carrying the transfer-pawls, forward until catch pawls 57 engage a fixed bar 62, as shown. Subsequently, cams 71 free these catches, and arms 72 throw forward the levers 56 while the pawls 59 engaging the locking- wheels 18 effect the transfer. Zeroizing-mechanism.-A special setting-lever 9, shown in normal position in Fig. 16, holds the printing totalizer-wheels away from the printing-point, but, when moved into a second position, allows totals to be printed. A third position also sets the total-printer into position, and brings a notch 106 in the hub of the segment opposite a lever 124 so as to allow this to drop and permit a pawl 121 on the toothed quadrant 111 to drop into and be carried along by a disk 112 fast on the shaft 14. The quadrant 111 then rotates the shaft 11; and the sleeves 23 carry back the wheels 20 and the totalling and intermediate wheels. Simultaneously, special cams raise the transfer parts out of action. The correct position of the quadrant is ensured by a spring-controlled lever 114.