Patent GB-506013-A (GB)
Abstract: 506,013. Calculating-machines. BURROUGHS ADDING MACHINE Co. Nov. 22, 1937, No. 32U92. Convention date, Nov. 23, 1936. [Class 106 (i)] A calculating or like machine has a plurality of registers carried on a common support movable to register selecting positions determined by a register selecting means which is controlled by movements of the travelling paper carriage and includes a means 44 which is movable away from normal position in dependence upon the movement of the paper carriage and in accordance with the movements of the register support appropriate to the paper carriage movement, effects by said movement the release of the register support for movement, is also movable toward normal position in dependence upon and in accordance with the movement of the register support, and, upon return to normal position, effects the arrest of the register support. The invention is described as applied to a Burroughs-Moon-Hopkins machine of the type described in Specifications 391,869 and 392,181. Register selecting mechanism. Selecting riders 25, Fig. 5, mounted on the paper carriage, have pass-by pawls 26 which engage rollers on an escapement wheel 28 and, through gears 31, 32, 34 and 35, rotate a gear wheel 36 together with ratchet wheels 38, 41, mounted on a common stud 37. Freely mounted on the stud 37 is an arm 44, Figs. 4 and 5, urged by a spring 46 and carrying an escapement pawl 42, a nose 43 of which is held in engagement with the ratchet wheel 41 by a spring. The arm 44 is carried round by the ratchet wheel 41 until a pin 50 engaging the edge 51a of a lever 52, releases a pawl 56 from ratchet teeth 57 of the register magazine 23, allowing the latter to rotate clockwise; whereupon, a tooth 67 of wheel 68 raises a pin 66 and rotates arm 64, whereby arm 61 engages pin 60 and oscillates pawl 42 to allow it to step back one tooth-space. This operation continues until the pin 50 leaves the raised edge 51a and allows the pawl 56 to re-engage the ratchet 57. Upon reaching the twentieth register position, a pin 92, Fig. 3, on the magazine lifts a lever 91 and through link 96, arm 97, shaft 98, Fig. 3 and 4, and link 100, releases pawl 39 from ratchet wheel 38 and allows arm 44 to return to normal without further movement of the magazine. The upward movement of the arm 91, Fig. 3, also releases a pin 89 on a spring-urged three-armed member 86 thereby allowing a bell-crank 82 to be rotated by a spring 84 and lift a hooked arm 78 to release a spring-urged arm 75 and rotate the escapement wheel 28 out of the path of the pass-by pawls 26. On returning to its initial position the pin 92 first releases the arm 91 to restore pawl 39, Fig. 4, and then engages arm 86 to re-latch the pin 89 and restore the bell-crank 82. The hooked arm 78 cams the pin 79 to bring the escapement wheel 28 back into its operative position. To prevent arm 44, Fig. 4, from being moved away from its normal position farther than a predetermined amount, due to misoperation, an arm 102 extending from the pawl 39 is arranged to be engaged by the pin 50 to release the ratchet wheels 38, 41 for clockwise rotation. A spring- urged arm 103 pivoted at 40 bears against the ratchet 38 to prevent a too rapid return. Column selecting mechanism. A series of keys 110, Figs. 1 and 8, each representing a particular columnar position, are arranged across the paper carriage. Depression of any key moves a bail 116 which, through linkage 119 ... 125 closes the circuit of a motor 7 and a pin 131 on a toothed wheel 132 driven thereby engages a hooked arm 129 and through a second linkage 133 ... 136 raises and latches a tabulator stop 138, urged laterally by a spring 140, Fig. 8. A link 150, Figs. 1 and 7, is also raised and, by rotating, a lever 151 depresses the escapement pawl 145 to release the ratchet 142 controlling the paper carriage, whereupon the released carriage is moved along by its spring until a projecting portion of the depressed key meets the tabulator stop 138, Fig. 8. The shock of the engagement is cushioned by a dashpot 141 and the released stop 138 in moving downwardly restores the key 110. During the upward movement of the link 150, Fig. 1, a link 160 rotates a lever 161 to engage a spring-urged hook 163 beneath a lug 164 on a member 165, figs. 1 and 10. Upon release of the key 110, the hook 164 raises the slide 165 and unlatches a three-armed, spring-urged lever 167, Figs. 6 and 10, which, after a projection 176, Fig. 4, has been moved out of the path of the register carriage 177, Figs. 4 and 6, by re-engagement of the pawl 56 with ratchet 57, moves the carriage 177 to withdraw the appropriate register 21 from the magazine. A pin 170, Fig. 10, then depresses a slide 171 to engage the usual clutch, and drive the machine through a single stroke of operation. An arm 175 then descends to disengage the hook 163 thereby releasing slide 165 and restoring the latch 166. In performing vertical posting work where the paper carriage remains stationary, the above operations are started by depression of a motor bar 8, Fig. 1, which through link 180 and crank 182, Fig. 10, raises the slide 165 and soon as above.