Patent GB-919998-A (GB)
Title: Paper carriage control mechanism for accounting machines
IPC: G06C23/06
Filed: 1961-04-07
Abstract: 919,998. Calculating-apparatus. OLIVETTI & C. S.p.A. ING. C. April 7, 1961 [April 11, 1960], No. 12509/61. Class 106 (1).  An accounting-machine with a travelling paper carriage has a carriage control mechanism comprising a set of column stops movable with the carriage and individually co-operating with a counterstop to locate the carriage in a corresponding columnar position, and is characterized in that both the print and non-print mechanisms and the disabling means for releasing the carriage are controlled by a member operated by a cyclical operating mechanism. The stops 26 (Fig. 1) are radially mounted on a drum 20 connected via gears 18, 17, 14 to a rack 13 secured to the carriage 12, and each has a projection 33 adapted to be engaged by the. abutments 40, 41 of a counterstop 34. When the projection 33 engages the longer abutment 41, the counterstop is rocked slightly about a pin 36, its shoulder 43 is disengaged from a slot 37 of a stationary plate 38 and it is spring-urged towards the right so that the abutment 40 engages and hence locks the stop 26. Printing and tabulation.-When a key such as the " add " (and print) key 115, Fig. 7, is depressed, the main shaft 10 rotates so that a cam 110 releases a lever 109 and a spring-urged slide 11 moves forward until arrested by a projection 117. The lug 107 of lever 11 engages a cam slot in a transverse bail 103, sliding the bail laterally so that its projection 114 comes into the path of an end 113 of a lever 112. On further rotation of the shaft 10, a cam 111 rocks lever 112 counterclockwise, and hence the bail 103 clockwise so that latches 102 are lowered and individually release type slides 100 so that printing can take place on the platen 71, the bar 101 having been removed in known manner during the cycle. The forward end 11<SP>1</SP> of lever 11 engages a lug 65, Fig. 4, rocking a lever 64 so that its lug 63 moves out of the path of a projection 62 of a slide 54. If a manual lever 68 is in its normal position with respect to a position latch 70, as in Fig. 4, its lug 67 is also clear of a projection 66 of slide 54 so that a cam 61 on the main shaft 10 releases the slide 54, which moves rearwards to assume a first position. A lever 52, pivoted to the slide 54, is thus moved until its projection 51 is above an arm 50 (see also Fig. 1) of a lever 46 so that when a cam 59 on the main shaft rocks an arm 56 the lever 46 is rocked counterclockwise. The pin 45 of the lever 46, moving in a slot 44, moves the counterstop 34 leftwards, Fig. 1, to an ineffective position, thus disengaging the stop 26 and releasing the carriage for a tabulating stroke. Printing without tabulation.-If the manual lever 68 is in its second position, as in Fig. 5, the lug 67 engages the projection 66, thus preventing the slide 54 from moving through its maximum distance. When the lever 56 rocks therefore, lever 46 is not affected and pin 26 is not released, thus preventing tabulation. Non-printing without tabulation.-If a non- printing key such as "correction'' key 116 is pressed the main shaft 10 is rotated but a pin 118 prevents the slide 11 from moving. Thus, the bail 103 is not moved and the projection 113 will not operate the printing mechanism. Also, the end 111 of slide 11 does not rock the lever 64 and hence the slide 54 remains stationary and the stop 26 is not released. Line-spacing.-To initiate line-spacing, the stop 26 must comprise an additional projection or tappet for co-operation with a lever 91. When the lever 52 moves to its full extent, a pin 89 rocks a lever 87 counterclockwise causing a three-armed lever 83 to rotate clockwise. The lever 91 (Fig. 6, not shown) engaging the tappet portion of stop 26 arrests the movement of the arm 90 of the lever 83 when the arm 82 is in front of a lug 81 of a lever 77. When the lever 56 is rocked clockwise, the arm 82 engages lug 81, rocking the lever 77 counterclockwise, and hence, via bail 75, pawl 73 and ratchet wheel 72, moving the platen one line. If the stop 26 has no tappet, the lever 91 is positioned so that the lever 83 is arrested when arm 82 is below the lug 81. Thus, the line spacing mechanism is not operated when the lever 56 rotates. Specification 737,050 is referred to.