Patent GB-255075-A (GB)
Abstract: 255,075. National Cash Register Co., (Assignees of Robertson, W. H.). July 9, 1925, [Convention date]. Adding-apparatus.-A machine for use in the home whereby any member of the household may record and register expenditures comprises a classified record strip upon which the various items may be written and a totalizer with differential setting elements and independently operating means for registering the total amount expended. The totalizer numeral drums are freely mounted on the operating shaft and are rotated thereby through the interposition of friction discs. the extent of movement being determined by means associated with the differential setting levers. The receipts received from the various expenditures may be filed in a drawer or receptacle forming part of the casing. As shown in Fig. 1. a record strip 33 is led from a supply roll 34, over a writing table, to a receiving roll 43, the strip being held taut by tension springs 36, 46. The casing 52 carries a classified index plate 51 so that items may be entered in their appropriate columns. Totalizing-counters.-Each of the numeral drums is constituted by a band 58, Figs. 1 and 9, secured to a plate 59 having a collar 61 secured to a hub 60 loose on the shaft 68. To each plate 59 is riveted a disc 63 with a plurality of slots 64, Fig. S, equal in number to the digits on the band 58. Slidably mounted in each slot 64 is a plate 55 adapted to be moved to an operative position by means associated with the setting levers. Spring clips 67 are provided to hold the plates 65 in their home or operative position. Between the hubs 60 are arranged friction discs 72 having lugs 73 engaging longitudinal grooves 71 in the shaft 68. and a sleeve 77 with a compression spring 78 is provided to press the hubs 60 and discs 72 together. The numeral drums are covered by a slotted and apertured plate 97, Fig. 6, mounted for limited longitudinal movement by means of a cam-race 103 on a drum secured to the shaft 68. The setting levers 90, which are freely mounted on the hubs 60, extend through the slots and each lever passes through a corresponding plate 108, Fig. 10, guided in the slot of the cover plate by a flange 109 and stud 110 so that the plates 108 but not the levers move with the plate 97. By this arrangement, on the rotation of the shaft 68, a depending flange 111 on each of the plates 108 projects one or other of the plates 65 on the numeral wheels to operative position so that on the continued rotation of the shaft the projected plates 65 meet corresponding stops 112 on levers 113, Figs. 5 and 8, to limit the amount of rotation of the wheels in accordance with the setting of the levers 90, the levers being retained in set position by pawls 94 engaging notched plates 93 on the levers. Rotation of the shaft 68 in a direction opposite to that of the arrow, Fig. 1, is prevented by a ratchet wheel 82 and pawl 84. The numeral drums are normally locked and freed for operation by the withdrawal of projections 127 on a longitudinally movable slide 118 from slots 128 in the wheels, movement of the slide being effected by a cam-race 129. Transfer mechanism.-Carry-over to the next higher denomination is effected by transfer teeth or projections 114, Fig. 8, on the lower wheel engaging the end 115 of the lever 113 associated with the next higher denomination so as to displace the. stop 112 out of the path of the projected plate 65 to permit of a one-step movement, the plate being arrested by a corresponding stop 117 on the plate 118. The tripped transfer levers 113 are restored at the beginning of the next operation by pins 125 on extensions 126 of the cover plate 97, and the return of the projected plates 65 is effected by the stops 117 on the return of the plate 118.