Patent GB-905806-A (GB)
Title: Linefinding and printing control arrangement for an accounting machine
IPC: G06C21/04
Filed: 1960-10-26
Abstract: 905,806. Typewriters &c. NATIONAL CASH REGISTER CO. Oct. 26, 1960 [Oct. 30, 1959], No. 2633/62. Divided out of 905,805. Class 100 (4). [Also in Group XIX] An accounting-machine with a mechanism for positioning a record medium for printing on a desired line has a selectively-operable device for causing a manually-settable line-finding device to control the positioning mechanism and at the same time to disable one of two groups of printing devices. The positioning mechanism is normally controlled by a magnetic record on the back of a combined statement and ledger card as described in Specification 852,857 but is controlled by the manually-settable device when a balance read from a further magnetic record on the ledger card is to be printed on a desired line of a " numerals card " in a numerals transfer operation. Numerals transfer operation.-The combined statement and ledger card has the same information printed on each half. The machine may be set, by means of a known function switch, for a numerals transfer operation in which balances sensed from the ledger cards may be entered on a numerals card half the size of the ledger card. After inserting a ledger card for sensing, the numerals card is placed at the right on the ledger card table and the balance is printed on it together with the date. For this operation, a member 76, Fig. 10, is set to " on " and so positions control discs 393 in the sets of notched discs controlling in known manner the operation of the hammers for the ledger card that those for the left-hand portion are rendered ineffective. The member 76 also actuates switches 400 controlling relays, which cause the manuallysettable line-find device to be used to select the printing line on the numerals card. Manually-settable line selection.-In automatic line selection, the two-digit line number is sensed from the ledger card and the two differentially-timed signals obtained control two auxiliary differential mechanisms which, as described in the prior Specification, cause the card table to be positioned at the corresponding line. Manual selection is by means of a knob 75, Fig. 10, fast with a number wheel 410, and a switch spider 420, see also Fig. 15, which moves over a printed circuit board. The line number is represented in the circuitry by a two-digit radix-six number and when the switch is set, one of seven spider arms 422 rests on a units contact 552 and a longer arm 421 rests on a " sixes " contact 551 or 550. Circuits are thus completed from a source of negative potential 555 to appropriate contacts of units and " sixes " wiper switches SR1101 and SR1102. The wipers of these switches are driven in synchronism with the driving elements of the differential mechanisms and so negative pulses are applied to points 553 and 554 at differential times for the control of the line-selecting auxiliary differential mechanisms as is the case when they are controlled by the magnetic record sensing devices. This manually-settable line selection may be used in operations other than Numeral Transfer operations by depression of a Manual Input button.