Patent GB-190805419-A (GB)
Title: Improvements in or relating to Adding Machines.
Inventor: BOULT ALFRED JULIUS
Filed: 1908-03-10
Granted: 1909-03-10
Abstract: 5419. Boult, A. J., [Burroughs Adding Machine Co.]. March 10. Calculating - apparatus. -Relates to adding-machines, especially those of the type set forth in Specifications No. 17,126, A.D. 1893, No. 21,268, A.D. 1897, and No. 27,874, A.D. 1903, and consists in providing (1) means for taking separate or independent totals of successive series of items, as distinct from the usual sub-totals which generally include the amounts of previous sub-totals, (2) means for effecting crosstabulation, including the printing of line-totals and of a grand total, (3) means for listing and independently accumulating two separate columns of items, such as debit and credit items; and (4) modifications of the transferring-devices involved by the above. The means referred to consist generally in the provision of two series of registering- wheels, the corresponding wheels and pinions of each series being situated on opposite sides of, and actuated by, pinions engaging with the usual adding-racks in a manner similar to that of the regular adding-wheels of a Burroughs machine, but differing in function in being, in the present case, merely transmitting- pinions imparting motion to either set of registering - wheels as may be desired. The pinions 916, Fig. 10, actuated by the usual racks 610 of a Burroughs machine are each provided with a bevelpinion 916<a>, the axis 916<b> of which is radial to, and carried by the wheel 916. The pinion 916<a> engages with annular racks A<2>, Fig. 11, on the inner sides of notched disks A, B, to which are also attached the two corresponding number-wheels A<3>, B<3>. If one of the two series of disks A, B is prevented from rotating, while the pinions 916 are in engagement with the racks 610, the other series is turned through an angle twice as great as that through which the pinions 916 are turned. The pinions 916 are therefore provided with twenty teeth instead of ten, and thus the rotation imparted to either series of disks A, B and number-wheels A<3>, B<3> corresponds in the usual way to the movements of their actuating-racks. Corresponding numbers on the two series of number-wheels are displaced as shown in Fig. 3 to facilitate the reading of the totals on each series through openings F<1>, F<2> provided for the purpose. The locking of the notched disks A, B is effected by corresponding series of detents or locking-dogs 926<R>, 926L, Fig. 2, controlled respectively by keys C', D<1>, the stems C, D of which are engaged by a pivoted locking-bar, so that the depression of one key ensures the automatic release of the other. Thus items may be accumulated upon either of the two sets of adding-wheels as desired. (1) If the controlling-key C' is depressed, the items are accumulated upon the adding-wheels A<3>, and on the depression of the regular sub-total key and the forward movement of the operating-lever, the wheels A<3> are cleared and the total accumulated thereon is printed. If, before the release of the operating-lever, the key D<1> is depressed, the adding-wheels B<3> are unlocked, the wheels A<3> are locked, and the return movement of the racks 610 transfers the total previously accumulated upon the wheels A<3> to the wheels B<3>. A further series of items may then be accumulated upon the wheels A<3> and the total may be printed and transferred to the wheels B<3> as before, and, finally, a grand total may be printed by operating the machine in the usual manner immediately after the last separate total has been transferred to the wheels B<3>, and while the controlling-key D' remains depressed. The mechanism for taking totals and sub-totals differs from that referred to in the above - mentioned Specifications, being provided with a separate total key 293 and sub-total key 293s controlling the position of the usual pitman 914 and consequently the movement of the rocking accumulator-frame 910L. In accumulating items, the pitman 914 is in its elevated position, in which its upper forked end engages a stud 958<a> upon the rocking frame ; in taking totals, the lower end of the pitman 914 engages the stud 958, while in taking sub-totals, the pitman occupies an intermediate position in which it engages neither of these studs. The depression of either the total or sub-total key, however, ensures the release of all the racks 610. The depression of the sub-total key may be followed automatically by the depression of the proper controlling-keys, in this case the key D. When the pitman 914 and link 911 are in the intermediate position due to such depression, a stud 911<c> upon the latter engages, on the backward movement of the pitman, against the foot of a bell-crank lever G<1> pivoted to one arm of a lever G ; a slot in the other arm of the lever G engages a pin D<2> upon the controlling-key D, which is thus automatically depressed, releasing the disks B and adding-wheels B<3>, and simultaneously locking the disks A and adding-wheels A<3>. The controlling- key C<1>, which has been automatically raised during the preceding operation, may then be again depressed and the listing of a further series of items proceeded with. For the purpose of listing items and printing the usual sub-totals, the adding-wheels B<3> of the present machine would be employed, since in this case the controlling -key D' would be normally depressed and would not therefore be affected by the means employed for its automatic depression when the sub-total key is operated. (2) When suitable means for column-spacing and line-spacing are employed, the machine may be used for crosstabulation by depressing the controlling-key C' and at the end of a line by depressing the sub-total key 293<S>, by which means the accumulation upon the adding-wheels A<3> is printed and transferred to the adding-wheels B<3>. A grand total may be printed in the usual manner at the foot of the column of line-totals. (3) The controlling-key D is depressed during the listing of the left-hand one of two columns of items, and the key C' is similarly depressed when the paper-carriage has been moved in the position necessary to list the right-hand, and totals of the columns are printed in the usual manner. The controlling-keys C', D<1> may, however, be automatically operated by the positioning of the paper-carriage. Two cams JR, J<L>, Fig. 17, are adjustably mounted upon the rod 1704, and one engages, when the carriage is suitably positioned, with an arm of the corresponding one of two bell-crank levers I<R>, I<L>, Fig. 16, which are connected by links such as H to similar bell-crank levers G, K. These levers are adapted to depress the keys C', D' in the manner already described with reference to the lever G. The cams J<R>, J<L> may be turned upon the shaft 1704 to the inoperative position. (4) Studs A<1>, B' upon the disks A, B correspond in purpose and function with the radial transfer arms or cams of the usual Burroughs machine, and also serve as zero stops. The studs B' are adapted on the completion of a revolution to trip the transfer detents 413 and thus to move lugs 413a thereon out of the path of corresponding studs 651 upon the racks co-operating with the pinions 916 of the next higher pair of adding- wheels, thus allowing the racks to rise under the influence of their springs and effect transfer. A second series of transfer detents 413', Fig. 4, is operated by the studs A', and studs 413<11> fixed to the upper ends of the detents 413<1> engage lugs 413<c> upon the right-hand sides of the corresponding detents 413. Thus the lugs 413<a> upon the transfer detents 413 are moved and allow the racks 610 to effect transfer upon the completion of a revolution by the adding-wheels A<3> or B<3>. The two detents may, however, be connected together. When the detents 413 are operated and the adjacent racks are not in their normal or zero position, detent latches 411, Fig. 5, are moved by springs 480 and engage the forwardly-projecting arms of the detents, thus locking them in position. After transfer has taken place, all of the displaced latches are returned to normal position by means illustrated in Specification No. 18,516, A.D. 1907. When the adding- wheels are returned to their zero position, the hooked lower ends of the transfer detents 413, 413' engage with the studs A', B', which act also as zero stops.