Patent GB-308809-A (GB)
Title: Improvements in or relating to cash registers
IPC: G06C7/10
Filed: 1929-03-27
Abstract: 308,809. National Cash Register Co., (Assignees of Roberton, W. H.). March 30, 1928, [Convention date]. Addition to 285,500. Cash registers with operating means.-A multiple totalizer machine, for example one of the Shipley type, as set forth in Specifications 8119/15, 191,350, and 191,351 is provided with repeat mechanism functioning in accordance with the invention described in the parent Specification. By the use of the repeat key therefore, an entered item or a total or sub-total can be repeated and entered any number of times in one or more of a number of totalizers. Moreover in a machine having an add-andsubtract totalizer, an item can be subtracted from any desired totalizer, this being effected by obtaining the complement of the item from the add-and-subtract totalizer and then by use of the repeat key entering the complement in the selected totalizer. The usual aligning blade 82 for the differentially adjusted indicating &c. elements is operated from the cams 87 on the main shaft 55 through a disconnectible claw coupling. When the repeat key 105 is depressed, a lever 112 is rocked counterclockwise and through a link 131, lever 132 and pin 135 rocks a hook 96 counterclockwise out of engagement with a pin 98 on an arm 93 fast on shaft 86. The hook is pivoted on the arm of a loose bell-crank lever 85 carrying the aligning blade so that when the hook is coupled up, the blade is rocked in and out in the usual manner. When the repeat key disengages the hook, however, the blade is not operated and remains engaged with the sectors 80 throughout the repeat operation to maintain the indicating &c. parts in their differential settings. Loosely pivoted at 39 adjacent each differential actuator 36 is a lever 146 provided with a lip 147. Pivoted on the usual pin 66 connecting the reset spider 64 with the latch 47 is a tappet 152 having a lip 154 at one end and a pin 150 at the other. Normally the tappet occupies the position shown, with its lip behind a fixed curved rail 149 and thus inoperative with respect to lip 147 of lever 146. Depression of the repeat key, however, rocks shaft 127 clockwise and through forked projections 153 on this shaft and the pins 150 shifts the tappets counterclockwise to bring their lips in front of the rails 149. When the machine operates therefore, these lips engage those on the levers 146 which are therebv carried round until their rear ends 145 are stopped by beams 67 whereby the latches are broken to leave the actuators in the required differential positions. To prevent operation of the machine with both a repeat key and an amount key depressed, the following provision is made. Pins 128 on arms carried by the shaft 127 and adapted to rock the zero pawls 37 out of action when the repeat key is depressed, also serve normally to maintain a detent hook 167 in the position shown in Fig. 2. When an amount key has been depressed and the repeat key is then set, this hook is free to rock to the left to engage a shoulder 169 on the supporting link 158 and thus prevent the rise of the keylocking bar 156 and so the release of the machine. If on the other hand the repeat key is first depressed, the hook is held ineffective by a pin 166 on the link 58 supporting the amount detent bar 35 so that if this is lowered by depression of an amount key the hook is freed and thus enabled to seize the link 158 and lock the machine as before.