Patent GB-125041-A (GB)
Title: Improvements in or relating to Total-taking Mechanism for Adding and like Registering Machines.
Inventor: WADE HAROLD
IPC: G06C15/06
Filed: 1918-01-02
Abstract: 125,041. Wade, H., (Burroughs Adding Machine Co.). Jan. 2, 1918. Adding-apparatus with operating- means.-Relates to single-bank key-set independently-operated adding - machines of the kind in which the denomination - selecting mechanism includes a field of stops, for the actuating or differential members, with one series of stops for each denomination, which moves laterally, upon a carriage under the control of an escapement tripped by successive depression of the numeral keys of an item and is restored to normal position at one side of the machine during the concluding movement of the main operating handle or member. According to the invention, the depression of any item key positively locks both the total and sub-total keys, and this lock is maintained by the displacement of the carriage from normal position that immediately ensues; yielding lost-motion devices, whereby provision is made for the restoration of the totals-keys locking- member, are timed to come into action before the carriage is reset to normal position, and in consequence the only operation of the main operating handle that can result in unlocking of the totalskeys must be one which has followed the preceding operation without intervening depression of item keys, and thus without displacement of the denomination-selecting carriage. As the result of this there is ensured the idle movement of the operating-member necessary to bring the whole of the transfer parts to normal which should precede total-taking in machines with transfer by additional one-step movement of the ordinary actuators. The item keys (not shown) upon depression rock a shaft 3g through the connexions 45, 48, 49, 50<b>, thereby carrying a pivoted spring pawl 215 free of the vertically-downward arm 214<a> of a four-armed lever 214, and leaving a link 210, pivoted thereto, free to move forwards under the tension of a springs 211 for the purpose of carrying lugs 210<a>, 210b, Fig. 1<a>, thereon beneath the lower ends of total and sub-total keys 8, 9 to prevent their depression. The movement of the stop-field denomination-selecting carriage 17, that follows immediately the depression of an item key, carries a web or pin 17f over a rearward arm 214<c> of the lever 214 to maintain the locking-lugs beneath the total keys, and although the next operation of the main operating handle results in lowering the arm 114<a>, and forcing downwards a link 217 having a spring and lost-motion connexion with one arm 214b of the four-armed lever 214, the lever rocks only to remove the lock of the carriage has previously returned and carried its web 17<f> away from the rearward arm of the lever; the restoration of the carriage by the mainoperating handle takes place, however, subsequently to the movement detailed above for the restoration of the four-armed lever, consequently it is only possible to unlock the total keys by a sequence of two successive operations of the operating member without intervening depression of an item key. Transfer mechanism.-The segmental actuating-members 105 are advanced one step beyond their normal position to effect transfers, and are pivoted for the purpose to the differential levers 101. The lower rear arm 104 of each lever has a lip 104<a> normally adapted to restore the segment upwards during actuation. At transfer, a transfer pawl 107 is rocked to free a lug 105<a> upon the lower end of the segment, which normally limits the upward movement thereof, and the segment is then drawn upwards through unit step by a spring 106 attached to the upper arm 103 of the corresponding differential lever, the movement being limited by a lug 105b upon the segment which strikes the lower side of the lip 104a upon the lever. A latch 112 co-operates with the transfer-pawl. The totalizer receiving-pinions 115 are mounted in a pivoted frame 116 for disengagement with the segments during the setting or downward movement of the segments, and are locked during disengagement by spring pawls 120, 121. Restoration of the latches 112 and thus of the transfer pawls is effected by a bail 119 deriving movement from the main-operating mechanism, and as this occurs in the blank stroke after a main bail 114 has moved downwards to allow all the arms 104 to fall and therewith the segments, the lugs 105<a> of the segments become arrested on the upward stroke of the main-bail so that all transfer-springs 106 are tensioned.