Patent GB-503190-A (GB)
Abstract: 503,190. Calculating apparatus ; gearing for conveying rotary motion. CHICK, T. W. June 28, 1937, No. 7175/39. Divided out of 502,958. [Class 106 (i)] [Also in Group XXIV] A driving and control mechanism for a calculating-machine or other machine comprises a number of main driving members movable through different extents and/or with different timing in a cycle of movement, means for moving all the said members in each cycle, a number of secondary driving members each adapted for connection to drive a separate part or group of like parts of the machine, a number of coupling devices each arranged to connect a related secondmy driving member to a main driving member and by which each secondary driving member can be connected to a different main driving member, and a number of setting devices each coacting with all the coupling devices and movable to engage a different related group of coupling devices. The invention is described as applied to a calculating- machine of the type set forth in Specification 502,958. The main operating shaft 40, Figs. 1 and 2, carries a plurality of complementary cams 38, 39 engaging corresponding follower arms 35, 36, pivoted on a shaft 37. Eacharm 35 has a roller engaging a slot 34 in a corresponding main driving rack 32. The movement of each-rack, as to its extent and/or timing. depends on the shape and disposition uf its cams. The movement of the racks 32 can be transmitted to one or more of a number of secondary driving shafts 20, arranged transversely of the racks, by means of coupling devices constituted as gear wheels 41. The' wheels 41, Figs. 2 and 4, can be moved from an idle position, selectively to engage the racks'32. For this purpose each wheel is engaged by an arm 42 on a long pinion 43. Each long pinion has a single tooth and extends through a group of setting members. Each setting member comprises a number of bars 44 arranged in a horizontal plane and connected at their ends to bars 45, 46, and provided with one or more teeth to actuate the pinions 43. To move the setting members to their operative position banks of operation control keys 50, Fig. 5, are provided. Each key has a tubular stem with an enlarged head 53 in which is journalled the upper end of a shaft 50 formed with helical splines 58 engaging slots in the head 53. The key is prevented from rotating by projections on the head projecting through a fixed plate 55 so that on depression the shaft 56 is rotated. Each shaft 56 which extends through openings 67 in a number of plates 60 connected to the bar 46 of the setting members, has a pinion 59 secured thereto. One opening only in the plate 60 of each setting member is formed with teeth 71 in mesh with the related pinion 59 while all the other openings have each a single tooth 72 to co-operate with a tooth 70 on the pinion 59 to lock the remaining setting members out uf action. The outer plates 60 have pivoted thereto bell-crank levers 62 connected by a link 66 adapted to be engaged by detent 73 to hold the setting members in operated position. At the end of a cycle of operation a bail 78 is operated to release the detent. Specification 491,066 also is referred to