Patent GB-445877-A (GB)
Title: Improvements in or relating to calculating or the like machines
IPC: A01F1/06
Filed: 1934-10-18
Abstract: 445,877. Calculating-apparatus. BURROUGHS ADDING MACHINE CO., 6071, 2nd Boulevard, Detroit, Michigan, U.S.A. Oct. 18, 1934, No. 29886. Convention date, Oct. 19, 1933. [Class 106 (i)] In machines with a number of totalizers, the keyboard and differential mechanism are divided into sections to permit the simultaneous entry of amounts in the several totalizers and means are provided to take totals therefrom either positive or negative. If the totals are all of the same kind the machine operation takes all totals simultaneously. The invention is shown as applied to a Burroughs adding and listing machine as described in Specification 274,411, [Class 106 (i)]. The keyboard, differential mechanism, printing mechanism, and totalizers are divided into sections so that independent amounts can be entered at one and the same time. In the form shown in Fig. 2, the usual add and subtract totalizer is divided into two sections 10 and 10a. The usual paper carriage is provided and has means for automatically conditioning the machine for either addition or subtraction in selected columnar positions. The machine is set for subtraction also by the operation of a subtract lever 13. When either or both of the totalizers are in negative condition the total key T is locked. The locks for the two totalizers are similar and comprise a pair of pivoted levers 25, 28 with feet 27, 31 for cooperation with the transfer cams 24 of the highest denominational wheels 10, 11 respectively. The upper end of the lever 28 is in position to engage a pin 32 on one arm of a three-armed lever 33, another arm 36 of which has a bevelled end engaging a detent 37, while the third arm carries a pin 38 disposed in a cam-slot of a link 41, Fig. 4. The link underlies a stud 42 on an arm of a bail member 43 with a depending arm 46 yieldingly connected by a spring 47 to a pendant arm 48 arranged in position to engage a pin 49 on a spring-controlled lever 52. The lock mechanism for the right section has a bail 43a which extends to the left and has pendant arms 46a, 48a yieldingly connected and adapted to co-operate with the other end of the pin 49 on the lever 52. When the total in either totalizer is of the sign opposite to the setting of the totalizer frame 12, the link 41 will be raised and the bail 43, or 43a operated to move the arm 48 or 48a into engagement with the pin of the lever 52 which will rock to present its upper arm 53 to a stud 54 on the total key lever to prevent its depression. A lever 60 is provided to release the total lock; when manipulated the lever acts on the pendant arms 48, 48a to withdraw them from the pin 49 on the lever 52. If one totalizer contains a positive total and the other a negative total, means are provided to take the positive total and to clear that totalizer without affecting .the other totalizer, the subtract lever 13 is then set to subtract position, the release lever 60 is manipulated and the machine operated to take a true negative total from the other totalizer. For this purpose the shafts 44, 44a of the bails 43, 43a are provided with sets of hooks 70, 70a, one for each actuating rack, and spring-controlled arms 83, 83a. The arm 83 is provided with a square pin 84 engaging an L-shaped slot in a link 77 connected at its rear end to an arm on a shaft 82 operatively connected to the total key T so that when the key is depressed the link 77 is moved rearwardly. If the pin 84 engages the vertical branch of the L-shaped slot, the shaft 44 is rocked to put all the hooks 70 into locking engagement with the actuators ; on the other hand, if the pin 44 is aligned with the horizontal part of the slot, no movement is imparted to the arm 83. Similar mechanism is associated with the arm 83a. The links 77, 77a are normally in the raised position, but are lowered to couple their pins 84, 84a with the links when the corresponding totalizer is in an overdraft condition. When this condition occurs the corresponding lever 33 is rocked and a pin 71, Fig. 6, thereon by engaging a cam surface 72 on a lever 73 rocks the lever 73 so that a stud 76 thereon is lowered and therewith the link 77. After the positive total has been taken before the true negative total taking operation can be effected, the locking mechanism must be restored to normal position ; for this purpose the subtract lever 13 has an arm with a pin 96 engaging a forked lever 97 secured to a shaft 98 having arms 99 co-operating with levers 102 provided with pins 103 underlying the links 77, 77a. U.S.A. Specifications 1,778,506 and 1,172,484 also are referred to.