Patent GB-190215775-A (GB)
Title: Improvements in Calculating Machines
Inventor: GOLDBERG HYMAN ELI
Filed: 1902-07-15
Granted: 1903-01-08
Abstract: 15,775. Goldberg, H. E. July 15. Calculating - ap paratus. - Consists of adding-gear arranged to be operated by the digit keys of a typewriter or similarly. In the left and right hand halves respectively of a bridge 8 over the keys five and four rock-shafts 10 and intermediate levers 6 are operated by the keys, and in turn operate centrally-placed levers 15 by which rotation is imparted through toothed gearing between cheeks 18 to adding-gear in a casing 82, upon a slide 116 that is clutched to the papershifting carriage. The central gearing comprises sectors 20 operated by the digit levers 15 and a train of pinions and wheels 30, 31, 33, 62, 63, 68, part of which is shown in plan in Fig. 20 ; the pinions 30 corresponding to the sectors are on a common shaft, and one of them gears with the first wheel 31 of the train ; the second pinion 33 of the train is long enough to allow shifting, while remaining in gear with the second wheel 62 of the train. Owing similarly to the digit levers having teeth 38 to gear with pinions 39 one of which is in gear with a wheel 41, as the key concludes its stroke, a cam 47 on the shaft of the wheel 41 Figs. 20 and 21, is turned against a collar 48 on the shaft of the long pinion 33, to shift it out of gear with its driver 31. As the key and driving- gear recover their initial positions, a cam 51 on the shaft 32 of the first wheel 31 puts the long pinion back into gear with it. In order that the wheel 31 may not interfere with the long pinion while the latter is being shifted, the wheel has a portion 52 of its toothed face cut away, the lost motion so necessitated being allowed for by additional teeth on the sectors. To put the calculating-mechanism into or out of action, the pinion shafts are shifted by pushing a bar 53 bearing a yoke 54. The second wheel 62 of the train can be shifted so as to drive the third 63 either directly or through a reversing-wheel 65 according as addition or subtraction is to be performed. The adding-gear in the housing 82 consists of numeral wheels 86 and the carrying-wheels 91 and pinions 96, which are more clearly shown in Figs. 51 and 57. The slide 116 bearing the adding-gear in its housing moves from right to left of the type-writer with the ordinary paper carriage (upwards from Fig. 3), and each receiving-wheel is brought in succession into gear with the last wheel 68 of the train for the addition of the corresponding figure ; the addition thus proceeds from left to right of the items. The carrying-pinions and a non-revoluble pinion for engaging only the units wheel are mounted in separate rockers 101, and are normally all kept in engagement by a bail 112, which is subject to the pressure of a spring through an extension 113, Fig. 45. But, during actuation, the bail is kept off because the extension moves over a flange 115 on a fixed bar 114, while a fixed cam bar 104, Fig. 66, performs the same function as the bail, and also lifts each rocker in succession so as to prevent carrying from left to right. The counting-gear is set anywhere along the slide to suit the position of the printed column. By means of the rock-shaft 75, which bears arms 76, 77, 80 and another, and is operated by cams 46, 50, Figs. 20 and 21, the long pinion 33 and the last wheel 68 of the train are unlocked just before they are rotated, and are relocked just after they have been rotated ; the short arm 78 encounters a stop limiting the play.