Patent GB-451244-A (GB)
Abstract: 451,244. Calculating - apparatus. BURROUGHS ADDING MACHINE CO., 6071, 2nd Boulevard, Detroit, Michigan, U.S.A. Feb. 2, 1935, No. 3462. Convention date, Feb. 3, 1934. [Class 106 (i)] In a machine of the ten key, independentlyoperated type with one or more totalizers, the differential mechanism is normally conditioned to enter amounts to the full capacity of the selected totalizer and a control member is provided to condition the differential mechanism to enter amounts in a left - hand section of the totalizer thereby producing in effect a split of the register in order to increase the number of totalizers. The operation of the control member effects also the splitting of the printing mechanism and prevents operation of the actuating racks in the right-hand section of the totalizer. The invention is described as applied to a machine of the Hopkins type shown in Specifications 18058/07, 18320/08, 18321/08, and 18322/08, [all in Class 106], and embodying a drum type multiple totalizer as described in Specification 392,181. Depression of the numeral keys 2, Fig. 1, set up pins 7 in a movable carriage 6 controlled by the usual escapement mechanism and an operation of the machine causes the pins 7 to raise stop pins 20 in a stationary field to act as stops to limit the subsequent movement of actuating racks 21. The drum totalizers 30 and the rear totalizer 31 have each fourteen denominations and means is provided to split any totalizer into two sections ; for this purpose the amount is entered in the pin carriage 6 in the usual manner and the carriage is then tabulated seven steps to the left by the depression of a control key 45, Fig. 6, which is connected to a crank 46 having an arm 48 to which is connected a rod 49 pivoted to a crank 51. A pin 53 on the crank 51 engages the end of a link 54 extending upwardly through a slot 58 in a bracket 57, Figs. 2 and 3, and terminating in an arm 59 that co-operates with a pin 60 on the usual escapement dog 12 and carries a lug 61 that engages the carriage rack 14. The slot 58 has enlarged openings 62 for the passage of a stud 63 on the link 54. When the link is raised the dog 12 is freed and the lug 61 engages the rack so that the carriage is urged to the left by its spring until the lug 61 engages the usual operating slide 10 of the escapement. Upon release of the control key 45 the link 54 is lowered and the stud passing through the left-hand opening 62 restores the link to normal position while the dog 12 re-engages the rack to hold the carriage in its left-hand position. When the differential mechanism is conditioned for the entry of amounts in the left-hand section the printing of zeros in the right-hand section must be eliminated. For this purpose the usual overlapping projection 85. of the hammer latch 68 between the seventh and eighth denomination is omitted and is replaced by a slide 90, Figs. 6, 7, and 7a. The slide has a pin-and-slot connection 91 with one arm of a bell-crank 92, the other arm of which is connected to one end of a link 97. The normal position of the slide 90 is shown in Fig. 6 and a stud 98 thereon is in position to co-operate with a lug 99 on the latch 68 of the seventh denomination. When the link 54 is raised by depression of the control key 45 a pin 104 thereon rocks a lever 101 to which the lower end of the link 97 is connected and through this link rocks the bell-crank 92 to displace the slide 90 to the position shown in Fig. 7 whereby the stud 98 is moved out of range of the lug 99 to effect the split. A latch member 106 co-operates with a lug 109 on the link 97 to retain the parts in the split position during the machine operation. At the end of the operation the plate 111 that is provided to restore the displaced stop pins 20 co-operates with a projection 117 on the latch 106 to release the link 97 and permit the slide 90 to return to its normal position. To prevent movement of the rack bars 21 in the right-hand section, the bellcrank 92 is operatively connected through a rod 120 to a lever 122 with an upwardly extending edge 124 so arranged that when the slide 90 is displaced it will move to a position to set up the zero stop pins 20. The error key which functions to restore the pins and the pin carriage, is adapted also to rock a lever 134 which by the engagement of its upper end 136 with a pin 137 on the latch 106 is effective to release the latch to permit the slide 90 to return to normal position.