Patent GB-191219274-A (GB)
Title: Improvements in Calculating Machines.
Filed: 1912-08-22
Granted: 1913-04-03
Abstract: 19,274. Wanderer-Werke vorm. Winklhofer & Jaenicke Akt.-Ges., and Greve, J. E. W. Aug. 22. Adding and subtracting apparatus with operating-means. - Key-set lever-operated apparatus, having separate total and sub-total printing-levers, is provided with a single set of numeral-wheels, which are adapted to be driven directly by the actuating-sectors or indirectly, and consequently in the reverse direction, through an additional series of toothed wheels which always engage with the numeral-wheels. Transfer mechanism is provided which is reset when the total-printing lever is actuated, at the commencement of the ensuing operation instead of at or about the middle of the forward stroke of the operating- lever. The actuating - sectors 8, mounted by pin-and-slot connexions 8<a>, 105<a> on arms 105, are differentially set by means of keys which engage with stepped bars (not shown) attached to the arms 105, when the arms and sectors are released on the forward movement of the operating-handle 1<a>. The rearward movement, during which either the wheels 9<a> (for addition) or the wheels 9 (for subtraction) engage with the sectors, restores the sectors to normal position through sectors 4, 5, 6, 7, and shaft 3. The wheels 9, to which are connected the numeral-drums, and the wheels 9<a>, are always in engagement with each other, and are mounted in a casing 93 pivoted on trunnions 95 in a frame 10 pivoted at 11 to the main frame of the apparatus. Either set of pinions 9, 9<a> can be selected by means of a lever 99, which rocks the casing 93 into the position shown in Fig. 1, or into that shown diagrammatically in Fig. 8, the casing being locked in either position by means of a locking-plate 97 having studs co-operating with notches in the frame 10. The selected set of pinions is then engaged with the actuating-sectors on their return stroke by means of controlling-cams 17, 18 and co-operating rollers 14, 15 carried by the frame 10. When neither set of pinions is in engagement with the racks, a locking- rod 128, Fig. 1, engages with the pinions 9<a> and prevents them from rotating. Transfer mechanism. - Studs 104<a>, 104, Fig. 5, on the additive and subtractive sets of pinions 9<a>, 9 are adapted to engage at transfer with projections 100<b>, 100<a>, respectively, on a spring-controlled lever 100; the lever 102 and attached bar 103 are thereby allowed a limited movement, under the action of a spring 107, corresponding in extent to the step in the right-hand end of the lever. The bar 103 carries a projection 103<a> which is thus moved from the path of the sector 8 of the next higher denomination, permitting an extra movement of one step under the action of its spring, the length of the step being determined by the slot 105<a>. The transfer members 100, 102, 103, 103<a> are reset by a bail 110 and link 111 provided with a pair of hooks 111<c>, 111<b>, Fig. 1, at its lower extremity; the hook 111<b> is engaged by a stud 112<b> on an arm 112, and the link depressed, about the middle of the forward stroke of the operating-lever during the subsequent operation. When, however, either of the total-printing levers is actuated, it is necessary to reset the transfer parts sooner; this is done at the commencement of the ensuing total-printing operation, the movement of the link 29 of the total-printing lever (not shown) causing the pin 112<a> to engage the hook 111<a>, and the narrow portion of the slot 122<a> in the bar 122 to engage a pin on the lever 121<b> carrying the bail 121<a>. The bar 122 is moved longitudinally at each operation by means of a roller 126 on the lever 124 engaging the cam 18; normally this movement does not affect the bail 121<a>, but when the bar 122 and lever 121<b> are in the position described, Fig. 5, the bail 121<a> is rocked and the sectors 8 are reset to normnl position.