Patent GB-448791-A (GB)
Title: Improvements in or relating to accounting machines, calculating machines and the like
IPC: G06C11/04
Filed: 1934-12-14
Abstract: 448,791. Calculating-machines. NATIONAL CASH REGISTER CO., Dayton, Ohio, U.S.A.-(Assignees of Christian, R. A. ; 246, Telford Avenue, Dayton, Ohio, U.S.A.) Dec. 14, 1934, No. 35891. Convention date, March 16. [Class 106 (i)] A calculating-machine is arranged to print a series of successive dates, the first item of the series being selected by depressing one of a set of date keys and the mechanism then being advanced automatically to successive dates by the sub-total key. Means are also described for locking the machine after a predetermined number of cycles. The machine is used to produce a schedule such as shown in Fig. 2 giving data relating to a sale wherein a sum of 2000.00 is to be paid off in monthly instalments of 200.00. The schedule is prepared in its entirety and marked in the " date paid " column as each payment is made. Date-printing mechanism. The date of the first payment (e.g. April, Fig. 2) is set by depressing one of a group of twelve keys 31, 30. The group comprises a column of ten keys 31 and a column of two keys 30, Fig. 5, the latter having brackets 39 which embrace studs 40 on auxiliary stems 41 in line with the column 31. The machine shown has two totalizers, Nos. 1 and 2, Fig. 4. An additional wheel 38 with twenty-four teeth is pivoted on the shaft of the No. 2 totalizer and is engaged with a rack 36 during the ordinary engaging movement of this totalizer. The rack is advanced a differential amount corresponding to the month key depressed by a spring 61 secured to an operating arm 60, the wheel 38 thus being set to (e.g.) April. The rack 36 is connected to a printing segment 37. Printing can be prevented in any desired columns by a stop 98 attached to the carriage, the stop engaging a lever 97 which holds a bail 94 in the path of a lever 53 of the impression mechanism. The balance to be paid in monthly instalments-2000.00-is set up in No. 1 totalizer and printed in the balance column. The carriage is then returned to the " payment " column, the amount of the monthly payments -200.00-is set on the keyboard, the " April " key depressed and the 200.00 is added into No. 2 totalizer, subtracted from No. 1 totalizer, and printed together with the month name- APR.-the balance 1800.00 is then printed in the balance column by taking a sub-total from No. 1 totalizer. A sub-total-200.00- is then taken from No. 2 totalizer, printed in the payment column and subtracted from No. 1 totalizer. The depression of the No. 2 subtotal key causes the wheel 38 to be advanced to " May," this designation being printed as shown with the 200.00. This advance is caused by a spring-pressed latch 79, Fig. 6, entering a notch in the No. 2 sub-total keystem and, through a link 77, rocking clockwise an arm 73, Fig. 7, which rocks a latch 68. A lever 86 is thereby released and, by spring means 91, causes the rocking of a sector 89 through a pin - and - slot connection 88. The sector advances the wheel 38 and the parts are restored by a bail 93 when the wheel is disengaged from the sector and meshed with its rack 36 during the sub-total taking operation. The latch 68 forms a zero stop for the wheel 38 during sub-total or total taking operations, and for this purpose co-operates with two projections 66, Fig. 4, on the wheel. At the end of the operations, No. 2 totalizer is cleared and the wheel 38 left in its " zero " position. Locking machine after a predetermined number of operations. The number of operations is calculated beforehand and then set by adjusting a graduated knob 141 secured to the shaft of a ratchet wheel 112. The wheel is moved one step at each machine operation by a link 103 pivoted to an arm 105, Fig. 8, carrying a pawl 111 engaging the wheel. After the predetermined number of operations, the ratchet wheel reaches such a position that a stud 114 rocks a lever 116 connected by a link 117 to a lever 118 which is thus set so that a step 132 upon it blocks the movement of a stud 133 on a plate 134 connected to the starting bar 33. The machine is thus locked until the No. 2 total key 32 is depressed, whereupon a pin 128 on the keystem rocks a lever 125 connected to a shaft 122 having an arm 121 pivoted to an extension 120 of the lever 116. This lever, and the lever 118, are thus restored to normal position and the starting bar is unlocked.