Patent GB-1242050-A (GB)
Title: Cash register or similar accounting machine
IPC: G06C15/04
Filed: 1969-12-19
Abstract: 1,242,050. Cash register. NATIONAL CASH REGISTER CO. 19 Dec., 1969 [11 Jan., 1969], No. 61917/69. Heading G4T. A cash register or other accounting machine comprises a number of keybanks 20-28, Fig. 2 (some of which 27, 28, are for entering data to be printed but not to be included in the calculation), an actuator 55, Fig. 1, associated with each keybank, a totalizer drive 92 adapted to be engaged with each actuator, a mechanism associated with each actuator to set print (and indicator) means, actuator driving means, and control means to control the engagement and disengagement of totalizer drives from the actuators 55, means being provided to return the actuators associated with the "non- calculative" data keybanks 27, 28, to the zero position after positioning of the respective print and indicator) means and before engagement with the totalizor drives, when the machine is controlled to adding operations, so that the "non-calculative" data is not entered into the respective totalizors. In total, sub-total and reset operations no "non-calculative" data is entered, and the actuators of both the amount entering keybanks 22-26 and the "non- calculative banks 27, 28 operate together in the same manner in engaging the totalizers. Thus the totalizer elements associated with the "non- calculative" key banks may be used to extend the range of the totalizer above the highest denomination keybank by using a known "carry-tens" mechanism. Actuator drive.-Pin 57 on each actuator 55 engages a forked lever 58 connected to a differential slide 40 provided with abutments 51 to engage the stem of a depressed key. Rocking levers 76, driven via cams 85, 86, and followers 83, 84, reciprocate driving segments 60 about shaft 56 on which the actuators 55 are freely mounted. Clutch means disengage the driving segments 60 from the actuators 55 when the slide 40 is stopped by a key stem, and stud 88 on the rocking lever 76 moves a link 87 pivoted to the actuator 55 to abut the hub 90, thereby positioning links 91, 94, 96, 97, 98, 101, 102, to set print and indicator wheels. When the driving segments 60 return, the actuators 55 are picked up and returned to the home position. Engagement of totaliser.-The totalizer drivewheels 92 may be engaged with the actuators 55 by movement of shaft 93, said movement being controlled by setting keys in keybanks 20, 21 and by the slide mechanism 30. When the machine is set to add, the engagement is timed to be after the outward movement of driving segments 60, and before their return, so that amounts are entered by the actuators on their return stroke. For reading from the store the totalizers are engaged for the outward stroke, and stop to arrest the actuators when the respective totalizer elements reach the zero position, the stud 88 setting the print/indicator wheels as before. Keybank 21 operates via a differential mechanism (as described above) to rotate a shaft 186, Figs. 1, 4 and 5, via a linkage of the kind used to set the print/indicator wheels. A segment 173, Fig. 4, fixed to this shaft cooperates with a second segment 175, rotatably mounted on the shaft, and an arm 174 pivoted on stud 187 to determine the position of a pin 172 on arm 153 by means of cam surfaces on said parts 173, 174, and 175. Segment 175 is controlled by an arm 127, Fig. 7, sliding on a pin 193 on the segment, the arm being positioned via shaft 126 by the setting of control slide 30. Rotation of the main shaft 73, Fig. 4, causes the rocking levers 158, 157, 155, to rock arm 153 which then positions a plate 132 according to the position of the pin 172. A rocking lever 135, driven by a cam on the main shaft 73 either engages one of the arms of a T-shaped slot 133 in plate 132 or rides freely in the down arm of the T, depending on the position of plate 132. Thus the totalizers, controlled by plate 132, via crank 131 and shaft 130, are controlled to engage and disengage with actuators 55 according to the position of the pin 172. Return of "non-calculative" actuators.-The actuators for the "non-calculative" keybanks are driven (as described above) via cam 240, and cam followers 250, Figs. 5 and 6. A further cam 243, slidably mounted on the main cam-shaft 73, is keyed thereto at 242 so that it may be engaged with the follower 250 by horizontal movement of a yoke 245 pivoted to bracket 246. A pin 259 on the yoke is engaged by axially extending cam surfaces 253, 254 on the peripheries of segments 251, 252, coaxially mounted on a horizontal shaft 255. The segments are rocked by links connected to shafts 126, 186, the former being positioned by slide 30, Figs. 2 and 7, and the latter by keys of row 21, Figs. 1 and 2. Thus, when the machine is set to add, the yoke engages the cams 240, 243 to act simultaneously, the resultant profile being such as to withdraw the actuators after setting the print and indicator wheels, but before engagement of the totalizer elements. In other calculating modes the cam 243 is withdrawn and the actuators function in phase with the "amount" keybank actuators, for the reading of totals, subtotals &c. "Carry tens" mechanism.-An alternative arrangement of actuators 55, 212, and totalizer drive-wheels 92, 217, 232, is shown in Fig. 10, which also shows the operation of the "carry tens" mechanism. An additional segment 218 pivoted on shaft 213 is associated with actuator 212 to form an extension thereof, and is spring- urged into engagement with the end of the actuator 212 by spring 222. A spring-urged latch 224 pivoted to the frame of the machine has a stud 226 mounted thereon to co-operate with an arm 236. When the actuator is returned to zero (counterclockwise) the end 233 of the latch 224 normally engages the stud 234 on segment 218, thereby separating the segment from the end of the actuator 212. If, however, a "tens-transfer" from the next lowest order totalizer drive wheel (e.g. 232) is to take place, a laterally extending enlarged tooth on said wheel engages the end 228 of arm 236, releasing stud 226 and allowing latch 224 to present shoulder 237 to the stud 234. The segment 218 is thus not displaced from the end of the actuator and contributes an extra tooth 219 to drive the totalizer.