Patent GB-1118915-A (GB)
Abstract: 1,118,915. Calculating apparatus. ING. C. OLIVETTI & C. S.p.A. 8 Nov., 1965 [11 Nov., 1964; 10 Sept., 1965], No. 47335/65. Heading G4B. In a calculating device having a set of actuator racks 83 differentially movable under the control of a bar 87 reciprocable through a forward and return stroke, a storing device comprises a set of pinions 277, 278 mounted on shaft 282 and engageable with the racks 83, said shaft being rotated by a rack 296 operated concomitantly with said bar 87, means being provided to cause said pinions to be frictionally driven by said shaft. Storing Device (Fig. 4) comprises pinions 277 and 278 which normally engage racks 83 of odd and even orders respectively. The pinions 277 are each mounted on two sleeves 279, 281 rotatably and slidably mounted on fluted shaft 282. Each sleeve 279, 281 is provided with a flange 284, 286 respectively the surfaces of which have a high coefficient of friction. Pinions 278 are provided with two notches 287 engaged by lugs 288 of a disc 289. A spring 292 is located between each disc 289 and a ring 291 integral with each pinion 278. The spring urges the corresponding pinion 278 to contact the flange 286 and the corresponding disc 289 to contact flange 284. The shaft 282 is mounted on a pair of flanges 283 of a frame which also supports a transverse bar 298. The frame is urged upwards by spring 299 thus holding pinions 277, 278 engaged with racks 83. Rotatably mounted on flanges 283 is a shaft 321 secured to a stop bar 322 which co-operates with a tooth 323 of each pinion 277, 278 for determining the zero position thereof. A modified store device (Figs. 5-7, not shown) comprises a set of similar pinions (325). Operation of Storing Device.-When lever 313 is in its rest position (Fig. 1) pinions 277, 278 engage racks 83. During a cycle of shaft 121 when bar 87 begins its forward stroke, the rack 296 rotates pinion 294 together with shaft 282 and the sleeves 279, 281 which frictionally drive pinions 277, 278 whereby the pinions begin to displace the racks 83 before bar 100 engages the projections 101 thus avoiding the shock of the bar, which adjusts positively the final position of members 14 to contact stop 102. Similarly the shock of the bar 87 is avoided on its return stroke. When a new amount is to be stored in the storing device, lever 313 is pivoted anticlockwise displacing slide 309 to the left (Fig. 1). Cam slot 307 thus pivots lever 302 clockwise into contact with cam 304. Also cam slot 316 of slide 309 rooks lever 318 clockwise. Arm 319 is then rooked together with bar 322 which is thus located in the path of teeth 323. Upon starting a cycle of shaft 121, cam 304 rocks lever 302 clockwise whereby bar 298 together with the frame is displaced downwards thereby disengaging pinions 277, 278 from racks 83. Rack 296 rotates the pinion 294 anticlockwise which through shaft 282 and flanges 284, 286 rotate pinions 277, 278 until their teeth 323 contact bar 322 which thus clears the storing device. At the end of the forward stroke of bar 87, cam 304 causes spring 299 to re-engage pinions 277, 278 with racks 83 which differentially rotate said pinions. An amount stored in the storing device may be transferred to racks 83 by pivoting lever 313 clockwise. Differential Mechanism.-The differentially movable racks 83 are slidably mounted on stationary shafts 84 and co-operate with variably settable members 14 rotatably and slidably mounted on shaft 13. Members 14 are carried by a set up carriage 11 transversely movable step by step. Shaft 12 is rockably mounted on the machine frame to cause the members 14 to engage the racks 83. A totalizer 86 is also adapted to engage the racks. Operation.-At the beginning of each cycle of shaft 121, members 14 engage racks 83, and bail 88 is rocked anticlockwise displacing bar 87. Simultaneously pin 91 through rack 94, sector 96, arm 98, shaft 13 and arms 99 displaces bar 100 so that it engages projections 101 which are returned to contact a stationary stop 102 and thus zeroize members 14. Thereafter bail 88 is rocked clockwise and causes bar 87 to effect a return stroke while bar 100 is returned clockwise. The racks 83 are returned to rest while members 14 return to their set position. Printing.-Each rack 83 is provided with a pin 103 co-operating with a slot 104 of a corresponding type-carrier-controlling lever 106. Levers 106 pivot about shaft 107 and are urged by spring 108 against bar 109.