Patent GB-238901-A (GB)
Abstract: 238,901. National Cash Register Co., (Assignees of Shipley, B. M.). Aug. 22, 1924, [Convention date]. Cash registers; transfer-mechanism. - A machine employing totalizers composed of the usual ten-toothed pinions, such as that described in Specification 8119/15, is modified for dealing with English currency. For this purpose the transfer mechanism generally employed in this type of machine is utilized but modifications are introduced in order to effect the movements of the totalizer wheels necesitated by the non-uniformity of the currency system. As shown in Fig. 1, the keyboard is provided with the normal decimal banks for the pounds, units of shillings and units of pence and with a bank 35 of nine ten-shilling keys, a single tenpenny key 33 and a farthings bank 31. Transfer from farthings to pence. The farthings totalizer pinion, seen in Fig. 4, has two series of teetlh each comprising three ordinary teeth 101 and two long teeth. The first of these two long teeth effects transfer in the known manner through the instrumentality of trip arm 111 adapted to effect release of the transfer lever 108 controlling the stop lever 104 carried by the transfer-effecting arm 102. When transfer from this denomination occurs it is evident that a step of movement must also be given to the farthings pinion in order to neutralize the presence of the other long tooth, which is an idle one. For this purpose a set of transfer parts is provided for effecting a " transfer " to the farthings wheel simultaneously with the transfer proper to the pence wheel. For this purpose the transfer tooth of the farthings wheel co-operates with a trip arm 111, Fig. 6, controlling the " transfer " lever 108 for the farthings bank, and extended to the left to control also the trip arm 137 for the transfer lever 138 in the pence bank. Transfer from units of pence upwards. The units of pence totalizer wheel is capable of initiating two distinct transfers, namely (1) transfer to the tenpence bank and (2) transfer to the shillings. (1) The transfer tooth of the units wheel, of ordinary construction, co-operates with a trip arm 150, Fig. 11, fast on a shaft 151 carrying at its other end a lever 152 adapted to engage another arm 155 loose on a shaft 156. The transfer lever 157 for the tenpence bank tends to rock clockwise under the action of spring 158, but is normally prevented by engagement of a square stud 159 carried by the lever with a shoulder 160 on the lever 152. The function of stopping the transfer-effecting arm for this bank is not discharged directly by lever 157 but by a stop arm 162 held by a spring against a pin 161 on the lever. When the pence wheel passes from 9 to 0, the lever 152 will he rocked sufficiently to bring its end into contact with arm 155 and also to trip lever 157 the stud 159 of which escapes from shoulder 160 and is caught by a second shoulder 163. As the result of these actions the lever 157 and consequently arm 162 shift clockwise and transfer to the tenpence bank talkes place. (2) To provide for transfer from the pence to the shillings, the pence wheel has a cam 170, Fig. 11, with a low portion corresponding with the 0 and 1 positions, and co-operating with this cam is a lever 171 supporting a lever 173 controlling in turn a pivoted arm 174 bifurcated to engage and move a pin 176 on a lever 177. The tenpence wheel having alternately normal and long teeth is engaged by a lever 179 abutting at its rear end against the bent extremity 180 of the lever 177. Supposing both totalizer wheels are at 0 the addition of 3 would, through cam 170, cause rocking of levers 171, 173 but lever 179 abutting against lever 177 would prevent any further action and consequently no transfer would occur. If, however, the wheels were standing at 0 and 9 respectively, the addition of 3 would first of all cause transfer to the tenpence wheel as above described and then subsequently as the pence wheel passed from 1 to 2, lever 173 would be rocked and arm 174 would cam lever 177 counterclockwise, the obstruction by lever 179 having been removed by the advance of the tenpence wheel from 0 to 1. Lever 179 carries a pawl 182 containing a cam slot engaged by a pin on lever 152. When owing to transfer from the units of pence to the tenpence wheel this lever 152 is rocked, the pawl is swung clockwise to position its edge above a lug 185 of arm 155. Thus when lever 179 is rocked by the tenpence wheel passing from 1 to 0 the pawl will rock arm 155 clockwise out of the way of lever 152. This will permit the arm 152 to receive an additional movement from lever 177 through a pin 186 and thus to free completely the pin 159 to enable the transfer lever 157 and stop arm 162 to move farther to the right to permit two steps of movement to the transfer-actuating arm of the tenpence bank. Consequently the tenpence wheel will move from 0 to 1 and again to 0, and in so doing will cause transfer of one shilling to the next wheel. Deducting 2 from pence wheel when transfer to the shillings takes place. The actuating-mechanism in the pence bank is arranged to make two reciprocating movements in the cycle, the first being the ordinary actuating movement and the other, of short extent, being for the purpose of conveying two retrograde steps to the pence wheel. The actuator in this bank has seven fixed teeth and the transfer-actuating arm has four teeth and is normally stopped by the usual arm 139. Fig. 6, but a second control is provided by a pivoted plate 209 having a deep notch 210 to prevent interference with the normal transfer to the pence. When a shilling is transferred, however, the consequent rocking of trip arm 111 removes, through the mechanism shown in Fig. 6, a pin 207 from obstructing the plate 209 so that this is free to rock clockwise to bring a a surface 215 or 217 into effective position to stop the transfer-actuating arm during its second downward stroke and thus to leave the pence wheel minus the two steps deducted by the upward travel of the actuator. The selection of the surfaces 215, 217 depends upon whether transfer from the farthings has or has not taken place, this selective control being exercised by the arm 138 through a stud 212 in co-operation with shoulders 214, 216. To obviate untoward transfer from the pence bank due to a tripping of the transfer parts in the additional motion of the actuator a main shaft cam control is imposed so as to prevent displacement of the lever 157, Fig. 11, at such time. Owing to this provision the usual Y-lever drive for the pence wheel actuator is omitted and the driving movements for the pence bank are derived from the clerk's bank by means of a shaft 227, Fig. 12, fixedly carrying the hubs 226, 228 of the driving segments 77. The additional movement of the actuator is obtained by shaping the cams 79 as shown at 232. The zero trip pawls for these banks are held out of action during the movement by means of a dwell in the cam groove that controls the rocking of the release shaft.