Patent GB-922769-A (GB)
Title: Skip tabulation control arrangement
IPC: G06C21/02
Filed: 1961-11-15
Abstract: 922,769. Accounting machines; skip tabulation. NATIONAL CASH REGISTER CO. Nov. 15, 1961 [Jan. 23, 1961], No. 40850/61. Class 106 (1). Operation of a key or the action of a carriage function control stop latches a tabulating finger 40 clear of tabulating stops 28 until the latch is released by a release stop 134, after which the next tabulating stop 28 is effective. Normal tabulation.-The machine rear shaft 48, Fig. 4, rocks first clockwise and then anticlockwise. In the first half-cycle a pin 72 on arm 71 on shaft 48 by-passes pawl 73. Towards the end of the second half-cycle pin 72 rocks pawl 73 clockwise causing a pin 76 to contact lever 77 sliding in slot 79. A pin 80 bears on an ear 70 of bell-crank lever 65 and rocks the lever clockwise. A bail 44 on which rests a roller 43 controls the position of tabulating finger 40. When the lever 65 is rocked clockwise a roller 68 on an upper arm 67 of the lever raises the bail and thus finger 40. Pin 72 moves quickly past pawl 73 and the finger is only raised momentarily so that the next stop 28 halts the paper carriage. Skip tabulation.-A latch member 105 (Fig. 7A), is set by rocking anticlockwise lever 109 to which the latch 105 is connected by spring 112. This frees ear 106 from shoulder 110 and allows shoulder 107 to contact an ear 114 on a second upper arm 113 of bell-crank 65. When at the end of a machine cycle bell-crank 65 is rocked clockwise as described above, shoulder 107 retains the bell-crank in this position and the tabulating finger is held clear of stop 28. A latch-releasing member 128 slides in a slot 125 in a bracket 124 (Figs. 1B and 7B), on the machine body. A cam slot 133 in the releasing member receives a tail 108 on latch member 105. When the latch is set, tail 108 rotates member 128 until its end 132 is abutting a structural member 35, in which position an ear 131 lies in the path of projections 137 on release stops 134. When a projection 137 engages ear 131 the member 128 is pulled along slot 125 causing slot 133 to cam tail 108, downwardly-releasing latch member 105. The tabulating finger is lowered and the next stop 28 halts the paper carriage. The latch 105 may be operated manually or in an alternative embodiment from the paper carriage. Depression of skip key 84 (Figs. 1A, 1B), rocks bell-crank 86 and through lever 56 rocks trip lever 52 to start a machine cycle. Bell-crank 86 pulls link 90 to the left to rock the end 95 of crank 94 clockwise. End 95 contacts ear 111 on lever 109 and releases latch 105. As shaft 50 rotates clockwise, pin 49a releases link 90 to move under spring 101, so that pin 91 is at the rear end of L-slot 89. This rotates end 95 away from ear 111 to permit unlatching. If control is from the paper carriage an interponent 29 is moved by the known stop 135 (Fig. 15), and rocks a lever 33 to start the motor. An arm 120 on lever 33 acts on lever 109. If a release stop 134 (Fig. 13) is located close downstream of a stop 28, release member 128 cannot be set fully while the carriage is halted at stop 28 and the next stop 28A will be skipped. If, however, stop 28 is skipped, stop 28A will be effective. Crowding lock.-When a machine cycle is initiated by any other means than the skip key, ear 116 on lever 115 is adjacent ear 93 on lever 90 which prevents movement of lever 86 and thus the skip key.