Patent GB-773004-A (GB)
Abstract: 773,004. Calculating - apparatus. OLIVETTE & C. SOC. PER AZIONI. June 3, 1955 [June 11, 1954], No. 16024/55. Class 106 (1). [Also in Group XXIV] The paper carriage of an accounting machine carries column stops which, as the carriage moves laterally, are moved, relatively to the carriage and individually, to a carriage-arresting position and are then moved further so as to control the operation of the machine. Carriage driving mechanism. A rack 18 fast with the carriage meshes with a pinion 19 fast with a bevel wheel 21 with meshes with further bevel wheels 22, 23 free on a driving shaft 24. A rubber roller 30 is carried by a lever 31 which may be moved by a lever 34 and under the control of a spring 36 to engage the roller 30 with either of the bevel wheels 22, 23. That wheel which is engaged is . pressed into the corresponding one of two cups 28, 29 fast on the shaft 24 so that the carriage is driven in a corresponding direction. The frictional coupling between the bevel wheel and its cup slips when the carriage, on reaching a new columnar position, is held against further movement as described below. The lever 34 is rocked in one direction or the other by an arm 134 formed with cam slots 135, 136 in which engage the bent ends of rods 139, 140 respectively moved rearwardly (to the left in Fig. 2) by depression of Tabulating and Return keys (not shown). Depression of either of these keys also causes a pawl 114, Fig. 1, to engage one of five studs in a wheel 64 and advance this wheel and a detent wheel 66 one-tenth of a revolution. The wheel 64 has five teeth and co-operates with studs 68, 69 in a bifurcated arm 70 of a bail 71 to rock the bail so as to lower the pawl 38 integral with the bail from engagement with the carriage rack 18. The lever 34 may be rocked to return position by the action of a projection 52<SP>11</SP> on a column stop when the latter is moved forwardly as described below. The projection engages a stud 133 in a lever 132 which in turn engages a stud 131 in the lever 34. The latter may be returned to tabulating position by a projection 52<SP>1</SP> in a further column stop which engages the stud 131 directly. Column spacing. Column stops 42 are slidable on a rod 45 and in combs 40, 41 and 43 fast with the carriage, and as they approach an effective position, they are held to the rear by fixed bars 47 having cam ends. In the effective position, however, a nose 51 in the body of the machine cams the stops in turn forwardly into a space between the bars 47. A projection 53 on the stop then rocks, according to its position, a lever 54 or a lever 55. The levers 54, 55 are connected to slides 57, 58 respectively urged upwardly by springs 62 to move teeth 72, 73 into co-operative relationship with the studs in the wheel 64. One of the slides, however, is held depressed by a bail 74 according to the sign of the total registered by a totalizer. When a slide in effective position is moved by a column stop its tooth further rotates the wheel 64 by one-tenth of a revolution so that the bail 71 is restored and its arm 38 which may be provided with rubber pads, again locks the carriage causing its friction drive to slip. On depression of either the Return or Tabulating key, the rod 140 or 139 rocks a bail 141 which slightly raises the shaft 118 carrying the noses 51 as described below. Thus, the carriage movement will only be arrested by a column stop having an enlarged projection 50<SP>1</SP>, although, in the case of tabulation, if the key is released during movement of the carriage, the shaft 118 will be restored and the carriage will be arrested by the next column stop having a normal projection 50. The bail 141 is also rocked by the stud 133 when the latter is actuated by a carriage return projection 52<SP>11 </SP>as described above. Programme selection. Each column stop is formed with projections 52 which, when the stop is projected under the control of a nose 51, and by the bail 79 described below, determine the functions to be performed by the machine. Three noses 51 are angularly and vertically spaced on a shaft 118 which may be rotated to move a particular nose into effective position. The projections 50 on the column stops are arranged at different levels according to the programme for which they are intended. The programme selected is indicated by a disc 121 and pointer 125. A further selection may be effected by depressing a special key (not shown) which raises a slide 128 supporting the levers 54, 55 so that they co-operate with differently positioned projections 53. Automatic machine cycle. When a column stop, formed as in Fig. 1, without a notch 116, Fig. 2, is moved to effective position, a bail 79 is rocked and cams a lever 88 clockwise to release a lever 92, provided that the bail 71 is in carriage-locking position. The lever 92 rocks a bail 99 carried by a slide 85 so that both are moved rearwardly by a constantly rocking arm 102. The slide 85, by means of a cam slot 84, rocks the bail 79 so as to advance the column stop still'further, and rocks an arm 60 to lower the slides 57, 58 to ineffective positions. Finally, the slide 85 engages, in known manner, a main clutch to cause a cycle of operation. Towards the end of the cycle, a cam 115 restores the slide 85 so that the column stop is withdrawn. Moreover, a cam surface 107 restores a lever 109 and connected slide 111 (previously advanced by a spring 112) so that a tooth 113 thereon advances the wheel 64 to free the carriage for an automatic tabulation. The bail 99 and lever 92 are restored by a stud 117 in the cam 115. Manually initiated cycle. On depression of a motor key, a pin 91 rocks the lever 88 to release the lever 92 to cause a machine cycle similar to the automatic cycle described above. Specification 737,050 is referred to.