Patent GB-516792-A (GB)
Abstract: 516,792. Calculating - apparatus. TRIGGS, W. W. (Underwood Elliott Fisher Co.) July 8, 1938, No. 20248. [Class 106 (i)] An accounting machine with a tabulating carriage is provided with means to prove the accuracy of the posting which means is sensitive to the positive or negative character of the amount on an adding and subtracting totalizer and determines in which one of two other totalizers the amount shall be accumulated under the control of stops on the tabulating carriage. According to the invention the means controlled by the character of the total to be transferred determines the totalizer to be selected by controlling the effectiveness of the corresponding stop. The invention is shown embodied in a machine of the type described in Specification 401,904 with an add and subtract or balance totalizer 135, Fig. 1, selectively engageable with actuator racks 137, 138 for addition or subtraction, a set of rear totalizers A, B, C, and D for addition only, and a group of selectors 733, 734, 735, &c., Figs. 1 and 2, which are operated by stops adjustable on a control plate 770 of the tabulating carriage to control various functions of the machine. The totalizer A is used for accumulating new debit balances or an old credit,balance when picked up the second time for proof purposes; the totalizer B accumulates credits; the totalizer C accumulates charges or debits; and the totalizer D accumulates a new credit balance or an old debit balance when picked up the second time for proof purposes. The control elements '771A ... 771F, Figs. 6 and 11 correspond to the columnar positions on the journal sheet and proof tape and to the position for the blank or spacing cycle prior to the new balance position. Each control element is formed as a U-shaped channel in which the stops are mounted and each has a projection 675 that co-operates with the escapement teeth 668, 669 to limit the tabulating movement. The element 771B carries a stop C<SP>1</SP> to effect selection of the totalizer C; the element 771C carries a stop B<SP>1</SP> to bring the totalizer B into use. These elements carry slides 858 with projections W and X respectively at different heights for co-operation with the cam 852 on the end of a slide 851 that is adjusted as to height by manipulation of the add and subtract lever 950. The cam 852 displaces one or other slide 858 to cause the cam end 863 thereof to engage a pin on the escapement tooth 668 to prevent arrest of the carriage, by the projection 675, in that particular column. In the " new balance position to determine in which of the totalizers A or D the balance shall be entered the known mechanism, comprising a slide 338, as described in the above mentioned Specification is utilized. If the total is negative the slide is freed to move forwardly during the blank or spacing cycle and in the total taking cycle. The forward movement of the slide 338, through a link 957 rocks the bail 847 to permit the slide 851 to rise and raise the cam 852 opposite a projection y on a slide 858y carried by the control element 771E. When the slide 858y is displaced cam. slots therein are effective to raise a stop A' and lower a stop D' to ensure the selection of totalizer D in the ensuing cycle. The cam 852 is maintained up in engagement with the stop y by a projection y<SP>1</SP> until a cam 280 on the main shaft 17 returns the slide 338 to normal position. In the sixth or proof column when the " old balance " is again picked up manually it is entered in totalizer D or A depending on whether it is a debit or credit balance. The control element 771F has a cam slotted slide 858z co-operating with stops A<SP>2</SP> and D<SP>2</SP> formed with a projection z for engagement by the cam 852 to displace the slide 858z to raise stop A<SP>2</SP>  and set stop D<SP>2</SP> for a debit balance If the " old balance" is a credit amount the action of the slide 858z is nullified by the operator, before the machine is operated, depressing a key 967 to rock a linkage 965. 963 to raise a slide 961 and lower a slide 959. The slide 961 in its upper position prevents operation of the selector 741 for totalizer D and the slide 959 in its lower position pulls down the selector 744 for'totalizer A. A stop S may be provided to effect subtraction in the sixth columnar position when the " old balance " is negative the stop S'is rendered ineffective so that the amount is added by providing the slide 961 with a co-operating projection 973. The stop S is also raised by the slide 858 associated 'with the credit column. Additional stops M, T, N and L are provided for controlling the operating motor, the final total taking operation in the " new balance " column, non-add in the main totalizer in the proof column, and line spacing respectively. In a modified form the selector in addition to selecting the totalizers is provided with means to effect the printing of credit balances or overdrafts in,a separate column.