Patent GB-507723-A (GB)
Abstract: 507,723. Calculating - machines. DEFIANCE MANUFACTURING CORPORATION. Oct. 5, 1938, No. 28911. Convention date, Oct. 16, 1937. [Class 106 (i)] In a calculating-machine in which the selection of the totalizers and of the operation (addition or subtraction) to be performed in each selected totalizer are controlled by feelers movable into contact with a control member rotated by the carriage to bring variouslydisposed surfaces adjacent the feelers, the control member is rotated by a cam on the carriage arranged to turn the control member through equal steps for various tabulating steps of the carriage. The invention is shown applied to a machine having differentialactuating segments 16, Fig. 1, engaged by two totalizers 15 and linked at 148 to additional differential-actuating racks 149 engaged by additional totalizers 150. A totalizer is engaged during the outward stroke for subtraction and during the return stroke for addition. The selection of the totalizers and the determination whether a selected totalizer is to add or subtract are controlled by a control tube 107, Figs. 4 and 7, rotated by the carriage and having holes 202 thus brought adjacent to totalizer control feelers 201. There are two control feelers for each totalizer, one for addition and the other for subtraction. When a hole in the control tube is brought adjacent a control feeler, the feeler is rocked by its spring 236 to condition power-operated means which condition further power-operated totalizer-engaging mechanism. Construction and operation of control tube. The paper carriage has a cam-plate 151, Fig. 2, engaged by a roller 152 on a sector 153 pivoted at 154 and gearing with a pinion 155. The cam steps in the plate 151 are all of the same depth so that the pinion 155, and hence the control tube 107, are rotated a constant amount at each step, irrespective of the varying tabulating movements which bring the cam steps into action. A plate 156, Figs. 4 and 5, connected to the pinion 155 pivotally carries a roller 157 spring-held against a heart cam 158 having a pin engaging a slot 159 in an arm secured to a shaft 160 on which is mounted the tube 107, the shaft and tube thus being yieldably connected to the pinion 155. The control tube 107 is readily removable from the shaft 160 and is held thereon by a spring catch 244. Operation and restoration of control feelers. The control feelers 201, Fig. 7, are normally held away from the control tube 107 by a bail 226. When the starting bar 48, Fig. 8, is depressed, a clutch lever 50 is released to move anticlockwise and to drag to the left a link 239 to rock clockwise on arm 232 which is thereupon released from a roller 233 on a crank 234. The arm 232 is pivoted to a lever 229 which can now rock clockwise to lower a link 231 connected to the bail 226 whereby any control feelers 201 adjacent holes 202 are free to rock clockwise to enter the holes. The crank 234 rests on a roller 235 on an arm 112 on the mainshaft 6. During operation, this shaft first rocks anticlockwise, the roller 235 releasing the crank 234 which is then rocked by a spring 240 to re-engage the roller 233 with the arm 232. During the return clockwise -movement of the mainshaft 6, the roller 235 engages the crank 234 and restores this and the parts 232, 229, lifting the link 231 and rocking the bail 226 to return anticlockwise any operated control feelers 201. Totalizer engaging-mechanism. Adding and subtracting. A rod 203, Fig. 7, is pivoted to each control feeler 201, the rods passing through bearings 204 in a bail 225..When the control feeler 201 which controls a certain totalizer for addition enters a hole 202 in the tube 107, its rod 203 moves to the left so that its end lies over a slide 205, Fig. 9. Similar movement of the adjacent control feeler controlling the same totalizer for subtraction causes the rod 203 of this latter feeler to lie over a slide 206 connected to the slide 205 by a pinion 207, secured on a shaft 208 connected by a universal joint to the shaft 200 of the corresponding totalizer. The bail 225 is then lowered by a link 223 operated by the mainshaft 6, any projected rods 203 pulling down slides 205 or 206 and rotating the related totalizer shafts 200 in one direction or the other according to whether a totalizer is to be engaged for addition or subtraction. On each totalizer shaft 200 is a pair of cams 209, Figs. 7 and 10, one cam co-operating with a cam slide 210 and the other with a cam slide 211. These cam slides have high and low parts arranged so that the high parts of one slide are adjacent the low parts of the other. Both slides are moved to the right at the end of the outward stroke and returned at the end of the return stroke. The cam slides 210, 211 and the cams 209 are arranged so that, if a shaft 200 is rotated in one direction the cam 209 engages a raised portion of a cam slide and the shaft 200 is lifted to engage the totalizer for subtraction, while, if the shaft is turned in the opposite direction, the said shaft is not lifted to engage the totalizer (for addition) until the cam slides are moved to the right. The shafts of the two totalizers 15, Fig. 1, are similarly controlled from the left-hand slides 205, Fig. 9, through linkage 217, 216 and racks and pinions 215. Specification 406,152 is referred to.