Patent GB-483086-A (GB)
Abstract: 483,086. Calculating-apparatus. BURROUGHS ADDING MACHINE CO. Oct. 12, 1936, No. 27633. Convention date, Oct. 12, 1935. [Class 106 (i)] A calculating-machine having two totalizers is provided with an individual motor control member for each totalizer which controls means for setting the machine into operation and for rendering its respective totalizer engaging mechanism operative, the kind of operation to be performed being determined by a group of manually - operated selecting members or control keys, common to both totalizers. The invention is shown applied to a machine of the Burroughs port. able type with the usual banks of amount keys, and a bank of control keys comprising a subtract key, an add-subtract key, a non-add key, a total key, a sub-total key, a transfer total key, a credit balance key, and the usual repeat and error keys. The machine is normally set for addition. If the operator depresses the upper totalizer motor bar, the item set is added in the upper totalizer. Depression of the lower totalizer motor bar causes the item to be added into the lower totalizer while depression of both motor bars simultaneously causes addition to be effected in both totalizers. Subtraction will be effected, in like manner, if the subtract key is first depressed. Depression of the add-subtract key will enable an item to be added in one totalizer and subtracted in the other, subtraction being effected in the totalizer corresponding to the motor bar depressed. By depressing the total or sub-total key the machine will operate on depression of a motor bar to take a total or sub-total from the respective totalizer. A total may be transferred from the lower totalizer to the upper totalizer on depressing the transfer total key and giving the machine a cycle of operation. If the upper totalizer is in an " overdraft " condition a true negative total can be taken by first depressing the credit balance key. The machine is also provided with special character printing mechanism and with various inlocks. Differential mechanism and totalizer engaging mechanism. The amount keys 1, Fig. 21, on depression, act as stops for differential stop bars 2 that are connected to actuator racks 3 and the usual type bars. The upper totalizer, Figs. 1 and 6, comprises a set of pinions 10 carried on a pivoted frame 11 that is adapted to be rocked by a cam 14 to put the pinions into and out of engagement with the actuator racks. The cam 14 derives its movement from the main shaft 4 which carries a plate 15 that is moved counterclockwise from the position of Fig. 1 and returns to that position. The plate 15 through a link 16 rocks a bell-crank 17 carrying a stud 18 and roller 19. Near the end of the upward movement of the stud 18 it engages a notch of a pawl 24 pivoted on one arm of a bell-crank 23, the other arm of which is connected by a link 22 to a crank arm 20 on the shaft of the cam 14. Connected to the crank arm 20 is another link 21 that is connected to one arm of a bell-crank 28, the other arm of which carries a long pawl 29, Fig. 11. At the beginning of the return movement the stud 18 moves the pawl downwardly thereby rocking the bell-crank 23 to pull' the link 22 forward and operate the cam 14 to effect the engagement of the pinions 10 with the rack 3 for adding purposes. During the downward movement, a tail 26 on the pawl 24 engages a pin 32 and the pawl 24 is rocked out of engagement with the stud 18. Near the end of the cycle of operation the stud 18 engages the nose of the pawl 29 and pulls the pawl downwardly to rock the bell-crank 28 and thrust the link 21 rearwardly to return the cam 14 and disengage the pinions 10. The pawl 29 had been raised as the link 21 moved forwardly with the link 22. Depression of the subtract key S, Fig. 11, conditions the controls so that pinions 10 are engaged with the racks prior to their movement from normal position. The key S co-operates with a bell-crank 41, an arm 44 of which carries a stud 45 at the rear of a U-shaped member 46 pivoted on a lever 47 having an upwardly extending arm 52 with a stud 53 engaging an extension 54 on the pawl 29. When the key S is depressed the bell-crank 41 is rocked and the member 46 swings to a position to place a shoulder thereon under a lug of an extension 51 on the upper motor bar 33. The stem of the motor bar co-operates with a slidable control plate 36, Fig. 24, having a hook 37 that engages an arm 39 associated with known means to cause the motor to give the machine a cycle of operation when the - motor bar is depressed. On depression of this motor bar, the lever 47 is rocked, thereby moving the stud 53 away from the extension 54 and allowing the pawl to move to a position whereby a notch 31 therein engages the stud 18 so that at the beginning of the cycle of operation the bell-crank 28 is rocked to pull the link 21 forward to rock the cam 14 thereby engaging the pinions 10 with the actuating racks in the subtracting direction of movement. After the engagement movement has been effected, the pawl 29 is disengaged from the stud 18 and at the end of the upward movement of the stud 18 the pawl 24 is engaged thereby to rock the bell-crank 23 and thrust the link 22 rearward to return the cam 14 and permit the pinions 10 to move out of engagement. When the subtract key is depressed, the rear end of the bell-crank 41 engages a projection 59 on an arm 56 so as to rock the arm which by engaging a pin 57 on the pawl 24 moves the pawl to a position so that the stud 18 cannot engage the notch in the pawl on the return movement of the stud. The movement of the lever 47 is effective to operate a bail 102 connected to another bail 97 that changes the transfer mechanism from add condition to subtract condition. The transfer mechanism may be similar to that described in Specification 483,112. The lower totalizer comprises a set of pinions 130 in a pivoted frame 136. This totalizer may be the one selected from a number of totalizers arranged in a rotary totalizer magazine as described in Specification 483,113. The engagement and disengagement of the pinions 130 with the actuator racks 3 is effected by the operation of a cam 254 operatively connected with a pitman 252, Figs. 1 and 11, provided with a pawl 251 and projection 256 that co-operate with studs 250, 255 on the plate 15 carried by the main shaft 4. Near the end of the forward stroke of the machine, the pin 250 passes behind a shoulder on the pawl 251 and at the beginning of the return stroke the pin engages the shoulder to thrust the pitman 252 rearwardly, thereby causing the pinions 130 to engage the racks for an adding operation. Near the end of the return stroke, the pin 255 engages the shoulder 256 to withdraw the pinions. The machine is normally conditioned for addition on the upper totalizer and when the lower motor bar 220 is depressed the stem rocks a pawl 259, Fig. 2, which is yieldingly connected by a spring 260 to a long link 261 that is similarly connected to the arm 56 so that the arm is displaced to non- add the upper totalizer. If the subtract key S is depressed before the lower motor bar rocks an arm 266, Fig. 11, and, through a projection 267 thereon, lowers an arm 264 which is pivoted on the pitman and is effective to disable the pawl 251. As the U-shaped member 46 is displaced on depression of the subtract key, as described above, it rocks a pawl 271 to position a shoulder thereon under the end of an extension 274 on the stem of the motor bar. The pawl 271 is carried by a linkage 275 provided with a pawl 276 at its lower end so that when the motor bar is depressed the pawl 276 is moved up in front of the stud 255 to operate the pitman 252 at the beginning of the forward stroke of the machine to effect subtraction. Near the end of the stroke the stud 250 engages a projection on the arm 264 to withdraw the pinions 130. The linkage 275 is operatively connected to means for placing the transfer mechanism in subtract condition. Non-adding. An item may be printed without being entered in either totalizer by depressing the non-add key NA and the lower motor bar 220. The key NA, on depression, rocks an arm 262 which lowers the arm 264 to disable the pawl 251 and the motor bar 220, as described above, operates the arm 56 to place the pawl 24 in non-add position. The upper motor bar 33 on depression disables the pawl 251 by a projection 310 on the stem of the bar. Figs. 1 and 20 depressing a U-shaped member 312 fixed to the arm 262. Simultaneous actuation of both totalizers. This action can be effected if the non-add action of a motor bar on the other totalizer is disabled by depressing both motor bars simultaneously. When both bars are depressed a pin 314 on the stem of the lower bar rocks the U-shaped member 312 in time to prevent the projection 310 on the stem of the upper bar co-operating with the arm 311 of the member 312. At the same time a stud 316, Fig. 2, on the extension 51 of the upper bar 33 moves down behind a projection 317 on the link 261 to prevent non- adding of the upper totalizer. Subtraction on both totalizers will be effected if the subtract key S is depressed before the motor bars are depressed together. To subtract an item from the upper totalizer and add it into the lower totalizer, an add-subtract key A-S is first depressed. The stem of the key A-S engages an arm 322 that co-operates with the bellcrank 41 and with the U-shaped member 312 to set the controls of the upper totalizer for subtraction and maintain the controls of the lower totalizer in adding condition. To subtract an item from the lower register and add it into the upper register, the add-subtract key is depressed to rock the arm 322 which operates the bell-crank 41 to displace the U-shaped member 46 and as described above displaces the pawl 271 so that on depression of the lower motor bar 220 the pawl 276 is raised in front of the stud 255 to condition the control of the lower totalizer for subtraction. At