Patent GB-191351-A (GB)
Abstract: 191,351. Haddan, A. J. H., (National Cash Register Co.). Oct. 4, 1921. Cash registers with operating-means and several item-value totalizers; printing totals and subtotals.-In a machine such as that described in Specification 191,350, wherein a further and automatic control of the selection of the totalizers in adding operations is imposed by the use of shaped plates 168, 169 positioned differentially by the depression of the special keys, means for taking totals and sub-totals are provided which first of all disable this automatic mechanism and then proceed to effect the engagement of the desired totalizer with the actuators. Moreover, arrangements are made for preventing more than one impression, although the main operating shaft is required to rotate twice. The total-taking lever 7, formed with a circular portion camslotted as shown, is displaceable in either direction from the central adding position to any one of three positions corresponding with the clerks, transaction, and department sets of totalizers so that one of these sets may be thrown into gear with the differential actuators to convey to them the total standing on a selected totalizer. The direction in which the lever is displaced determines whether the machine shall produce and print a total or a sub-total. In order to disable the plates 168, 169 the lever is provided with a cam slot 190 engaged by a pin 191 on one of the three levers 159. When the lever 7 is moved out of its central position, these levers are rocked and with them the slotted levers 160, the pins 167 of which are consequently removed from the peripheries of the plates 168, 169, which are thus unable to exercise any influence upon these pins and therefore upon the pins 146 on the totalizerengaging arms 145. In the above movement of lever 7, a slot 99 through a pin 1198 on a lever 98 causes the disengagement of a pin 194 from the cam-operated lever 164 and thus breaks the driving connection between this lever and the levers 159. The means whereby the movements of the lever 7 determine which of the three sets of totalizers, provided in this. machine, shall be put into gear with the actuators, comprise three slots 196 engaged by the pins 167 on levers 160. The slots are so shaped that these pins are displaced and replaced in succession as the lever 7 is shifted into the three total or sub-total taking positions. The particular lever 160 when thus displaced will position the corresponding pin 146 so that the spider 176 in its subsequent operation will seize the pin, and through link 145 put the set of totalizers into effective position. At the same time the zero stops for limiting the rotation of the totalizer wheels are positioned for engagement by the transfer teeth, by means of slots 197 in the lever 7, which through pins 198 on levers 199 place links 203 connected with the zero-stop shafts in driving engagement with a notched plate 207 oscillated in the operation of the machine. To prevent release of the machine when the lever 7 is not set correctly in position, a lever 900 controlled by a slot 903 in the lever 7 is displaced so as to block an arm on the main shaft. When, for taking totals, the lever 7 is rocked counter-clockwise, a slot 905 through a pin 906 moves clockwise an arm 907 pivotally mounted on a plate 174. At the same time, the shaft 92 is rocked clockwise by means of a pin 96 projecting into a cam slot 97 in the lever 98 moved counter-clockwise, as stated above, by the pin 1198 in slot 99. The clockwise movement of shaft 92 shifts a link 923, Fig. 5, so as to withdraw a pin 924 on the link from a notch in a cam-plate 926 loose on a stud 927. Two pins 928 on the link also slide a plate 930 mounted in a gear-wheel 931, and thus connect the cam-plate 926 with the latter wheel, which receives a half rotation for each revolution of the main shaft. The clockwise movement of arm 907, as stated above, rocks the lever 182 about its pivot 908, and through a pin and slot causes the lever 179 to turn counter-clockwise about stud 184. This movement disengages the lever 179 from pin 177 on spider 176, which is temporarily locked by a pin 940 on lever 937 rocked by cam slot 935 in lever 182. The operating handle is now turned four times to rotate the main shaft 100 twice and the gear wheel 931 once. During the first halfrotation of this wheel, a lever 185 is rocked clockwise by cam 188, thus drawing lever 179 to the right and positioning a notch 950 immediately above a pin 951 on spider 176. The cam 933 on plate 926, Fig. 5, then causes shaft 92 to turn still farther clockwise and through arm 95 to lower the link 910, and through pin 911 to turn the lever 182 and also the lever 179 so that the pin 951 is received by the notch 950, and at the same time the spider 176 is released by the pin 940. The lever 185 is now turned counter-clockwise, moving the lever 179 to the left and rotating the spider 176 clockwise so as to cause through the selected pin 146 the engagement of the corresponding set of totalizers with the actuators. The parts remain in these positions while the actuators take up the settings of the totalizer in gear therewith, and then the lever 185 is rocked clockwise and shifts lever 179 to the right to restore the spider 176 to normal position. The cam race 933 next rocks shaft 92 to raise link 910 and rock levers 182, 179 and disengage notch 950 from pin 951, and lever 185 thereupon moves lever 179 to the left. Re-setting the total lever 7 to central position restores all the mechanism to normal condition; and it will be seen that the totalizers are rocked out of gear after giving their reading to the actuators so that the totalizers are now at zero. In a sub-totalizing operation, on the other hand, the lever 7 being moved clockwise does not affect arm 907 or lever 182 owing to the concentric portion of slot 905 now co-operating with pin 906. The shaft 92 is however rocked as before and connects the cam-plate 926 with gear 931. As lever 182 is not moved by lever 7, the lever 179 remains in connection through pin 177 with the spider 176. After the totalizer has been engaged with the actuators by movement of levers 185 and 179 to the right, the cam 933 effects through shaft 92 and link 910 the clockwise rocking of lever 182 and the consequent release of spider 176 from lever 179. At the same time the spider is locked by the pin 940, and thus the totalizer is held in gear with the actuators while the lever 179 is moved to the left. During the second half of the rotation of gear-wheel 931, the actuators are moved to replace their setting upon the totalizer wheels, and the lever 185 moves the lever 179 again to the right so that it may subsequently re-engage with the spider 176 and return 'it to normal position, thus disengaging the totalizer. Since in normal registering operations of the machine, the printing mechanism is operated at each rotation of the main shaft, it is desirable to prevent such operation during the first rotation of this shaft when taking totals or subtotals. For this purpose a pawl normally effecting driving-connection between the main shaft and the printing-mechanism operating-shaft is thrown out of action by an obstructing arm positioned by the rocking of shaft 92, and assumes its function again at the end of the first rotation, by virtue of the removal of the obstructing arm due to the rocking of shaft 92. A second pawl co-operates with the first to prevent overthrow of the printing shaft. Specification 8119/15 is referred to in connection with the mechanism shown in Fig. 5.