Patent GB-483112-A (GB)
Abstract: 483,112. Calculating - apparatus. BURROUGHS ADDING MACHINE CO. Oct. 12, 1936, No. 11383/37. Convention date, Oct. 12, 1935. Divided out of 483,086. [Class 106 (i)] Tranfer-mechanism.-The transfer-effecting segments that co-operate with the register pinions of a calculating-machine are actuated in one direction or the other for addition or subtraction by actuating members that cooperate with cam members settable relatively to the segments in accordance with the conditioning of the machine for addition or subtraction. In the embodiment shown in Figs. 1, and 2, the machine has two registers and a common set of differential actuating racks 3 ; each register comprises a set of pinions 10 rotatably mounted on a shaft in a frame 11 pivoted on a shaft 12 and movable into engagement with the actuating racks by the rocking of a cam 14 pivoted on a shaft 15 against the action of a spring during a machine operation. When the pinions are in disengaged position they mesh with transfer segments 60 pivoted on a shaft 61. Each pinion 10 is formed with a wide transfer tooth to co-operate with the nose of a pawl 64 pivoted on the frame 11 and formed with a lug 66 at its lower end normally engaging one arm of a bell-crank latch lever 67 pivoted on a stationary shaft 68. The other arm of the bell-crank has a shoulder 70 engaging a projection 71 on an arm 72 pivoted on a stationary shaft 73 and carrying at its upper end a roller 75 operating in a cam slot of the next higher transfer segment 60. During the actuation of the register if a transfer tooth 62 passes the pawl 64 as shown in Fig. 2, the pawl is rocked so that the bell-crank 67 operates to release the arm 72 which moves from the dotdash position to the full line position being arrested by an arm 77 integral with the arm 72 engaging a cross-bar or bail 78 secured to a shaft 85. After the register has been rocked into mesh with the transfer segments by the action of the cam 14 near the end of the operation, the bail 78 is rocked to free the arms 77, 72 which under the action of a spring 74 causes the roller 75 to move along the slot 76 to rock the transfer segment 60 to impart a unit movement to the pinion of next higher denomination. The rocking of the bail 78 is effected by the cam 14 through a link 80 connected at its lower end to an arm 81 with an abutment 82 engaging a roller 83 on an arm 84 secured to the shaft 85 of the bail. The direction of movement of the transfer segments for addition or subtraction operations is controlled by a set of directing members 90 which can be swung from the upper to the lower position shown in Fig. 1 by means operatively connected with the member which sets the machine for addition or subtraction. The members 90 form part of a yoke with rearwardly extending arms 92 that co-operate with lugs 93 or 94 on the rear arms of the transfer segments 60. In the upper position in Fig. 1 the roller 75 has moved to effect a counterclockwise movement of the member 90 and the segment 60 ; in the lower position the movement is clockwise. The shifting of the directing members 90 is effected by a cross-bar 95 engaging the notched end of the rear arms 92 ; the crossbar 95 forms part of a bail 97 connected through yielding connections (not shown) with the control for addition or subtraction. The transfer parts are restored to normal during the succeeding operation of the machine by a bail 117 on the arm 81 connected to the cam 14.