Patent GB-191219276-A (GB)
Title: Improvements in Devices for Controlling the Engagement and Disengagement of the Counting Mechanism with the Actuating Segments of Adding and Subtracting Machines.
Filed: 1912-08-22
Granted: 1913-04-17
Abstract: 19,276. Wanderer-Werke vorm. Winklhofer & Jaenicke Akt.-Ges., and Greve, J. E. W. Aug. 22. Adding - apparatus with operating - means; differential mechanism.-Relates to the mechanism for engaging and disengaging the totalizing-counter and differential actuating-segments and for controlling the sequence thereof during the operation of the machine so as to deal with addition and subtraction of items and also with total and sub-total printing-operations. From the main handle-operated shaft 1, movement is conveyed to subsidiary shafts 2, 3, and upon the shaft 3 are mounted the engaging and disengaging segments 17, 18, with cam-grooves 17<a> and 18<a>, respectively, for engagement, respectively also, with rollers 14, 15, Fig. 2, upon opposite sides of an arm 13 mounted so as to be capable of lateral movement through the sliding of shaft 12, hut falling and rising with a totalizer frame 10, pivoted upon a shaft 11, and carrying addition and subtraction receiving-wheels 9, 9<a>, either of which may be set for engagement with the differential actuating-segments 8. In item operations, during the forward movement of the handle, the roller 14 is in the circular slot 17<a>, and the totalizer is out of engagement during the positioning of the actuating-segments. At the end of this movement, however, a lug 19 upon one of the engaging segments strikes a pin 20 upon a lever 21<a>, 21<b>, adapted through a lever 22<b>, 22<a> to slide the shaft 12 and thereby substitute engagement of the roller 15 with the cam-slot 18<a>, the segments being sufficiently apart to preclude simultaneous engagement of the pins with both segments. Upon the return stroke, the totalizer is engaged and so maintained until near the end of the stroke, when it is disengaged, whereupon contact of a second lug 23 with the pin 20 restores the original roller and segment engagement. Printing totals and sub-totals.-Both the sub-total and total levers 25, 26 are pushed rearwards, the latch 27 remaining fast; the main operating-handle is then pulled forward and returned as usual, and the total and other levers finally returned. The sequence of operations is that the pin 20 is first displaced by the slotted lever 35 which simultaneously, by its projection 38, depresses a pin 39 upon the lever 21b, and thereby reverses the engagement of the segments with the rollers; the totalizer is consequently engaged during the forward stroke, the actuating-segments moving backwards until arrested at the zero position of the totalizer wheels by the transfer-mechanism (not shown), the total being thus set upon the item-printing members moving with the actuating-racks. Meanwhile the lower end of a lever 31 has moved forwards and has cammed upwards a lever 32 carrying a lever 33, or which one end is then struck by a pin 40 at the end of the forward stroke of the handle and the forward end operates on the lever 22<b> to reverse the roller and segment engagement and thereby to cause the totalizer to remain lifted during the return stroke of the handle. For a sub-total operation, the latch 27 is operated, whereby the lever 26 remains stationary and the reversal between the strokes of the main handle is in consequence omitted.