Patent GB-221162-A (GB)
Title: Improvements in and relating to the total-taking mechanism of calculating machines, record-controlled machines for compiling statistics and the like
IPC: G06C15/06
Filed: 1923-05-30
Abstract: 221,162. Haddan, A. J. H., (National Cash Register Co.). May 30, 1923. Adding-machines; statistical machines ; with several totalizers ; printing totals.-Relates to total-taking mechanism for calculating machines and more particularly for record-controlled machines as described in Specifications 184,824 and 221,255 and consists in the provision of zero stop pawls for each row of totalizers which pawls are connected to a link or toggle mechanism so arranged that when the selected totalizer pinions reach their zero position it closes a corresponding switch adapted to control a circuit regulating the position of the respective differential member and associated printing or perforating member. In adding operations the totalizer pinions 175 are rotated counterclockwise as described in Specification 221,134; in total taking operations the differential actuating racks 277 are first moved to their extreme right, Fig. 1, while the totalizers are in their normal or disengaged position as described in Specification 221,255. The totalizer is then selected and the racks moved differentially to the left depending on the number of steps the totalizer pinions are turned to reach their zero positions. This is effected by means of the transfer tooth 441 which is adapted to engage a stop pawl 1159 integral with an arm 1155, the arms for each row of totalizers being- pivoted to a link 1156 which is itself pivoted to a lever 1157 loosely mounted on a shaft 396. Similarly the link 1156 for the lower tier of totalizers is pivoted to a lever 1157 loose on a shaft 401. To each lever 1157 is pivoted a link 1161 connected by a pin 1163 to another link 1162 pivoted to levers 1164, 1166 loose on a shaft 1165. The ends of the levers 1164, 1166 are connected by a spring 1168 which holds the other ends of the levers in engagement with a rod 1169 secured to the framework. To the shaft 1165 is secured a hub on which is fixed a lever 1170 provided with slots 1171, 1172 engaging the pins 1163 so that the toggle links 1161, 1162 are straightened when the shaft 1165 is rocked by means of a cam-race 1011 on the main shaft 151, Fig. 2, with which engages a roller on a lever 1185 that carries a toothed sector 1184 meshing with a sector 1183 attached to an arm 1181 connected by links 1182 to an arm 1180 on the shaft 1165. The effect of straightening the links is to cause the links 1156 and stop pawls to be moved to the operative position so that when a totalizer pinion reaches its zero position it causes the lever 1164 to be rocked counterclockwise or the lever 1166 to be rocked clockwise depending on whether the totalizer is in the lower or upper set. The movement of the levers 1164, 1166, which have extensions 1175 engaging notches in a lever 1176, causes the lever 1176 to be rocked to close a switch 1178 controlling the energization of the magnet 238 .associated with the differential actuator. To prevent the closing of the switch at the wrong time should the movement of the link 1156 be sluggish, the levers 1157 are each provided with an arm 1173 which co-operate with projections on the levers 1164, 1166. Specifications 221,163 and 221,167 also are referred to.