Patent GB-190525882-A (GB)
Title: Improvements in and relating to Calculating Machines.
Inventor: MARKS GEORGE CROYDON
Filed: 1905-12-12
Granted: 1906-07-19
Abstract: 25,882. Marks, G. C., [Roth, G.]. Dec. 12. Calculating-apparatus; counting-apparatus.-In a single-bank key set and operated adding-machine, having a totalizing-counter laterally movable manually with respect to setting-elements, the use of three setting-wheels with different numbers of teeth enables farthings, pence, shillings, and pounds to be registered by the one set of nine keys. Each key depresses a pivoted lever 3 to rotate the corresponding sector 6 loose upon the spindle 9, the pawl 11 carried thereby driving the ratchet-wheel and the spindle until arrested by its stop 13. The movement is carried by spur-wheels to the shaft 16, upon which are keyed the three alternative setting-wheels 15, 17, 18. The framing 25 of the totalizing-counter has in addition to the lateral motion a rocking movement at will about the spindle 28 to put the numeral-wheel pinions 32 on the main counter-spindle 29, either into or out of gear with the setting-wheel, and one numeral wheel each is provided for the farthings, for units and tens respectively of pence and of shillings, and for each denomination of pounds, setting-wheels 15 being used for the farthings registration, 17 for the pence units, and 18 for the shillings units and all wheels above, there being no direct registration upon the pence tens wheel since the tens of pence are registered upon pence units wheel by a modification of the " 1 " key and the transfer mechanism is arranged accordingly. For the farthings, the three keys " 3," "6," " 9 " are doubly marked as shown and move the farthings wheels through those fractions of a complete revolution. There are twelve numerals on the pence units wheel, namely "0," "1," "2" . . . "9," " 0," " 1," and transfer takes place, at the change from " 9 " to " 0 " or-from " 1 " to " 0," on to the pence tens wheel, which like the tens of shillings wheel bears a repetition of the digits " 0," " 1 " and transfers at every change from " 1 " to "0." The keys rotate the pence units wheelthrough the corresponding number of twelfths of a revolution, and by the; substitution of a different stop 13 the " 1 " key may move this wheel through tenthirteenths. The registration of twelve or more units upon the pence units wheel thus causes two transfers to the pence tens wheel and one transfer from the latter to the shillings wheel. The transfer mechanism consists of transfer teeth 65 upon the lower numeral wheels, transfer wheels 61, 62 upon a countershaft 54, and the pinion 32 on the higher numeral' wheel, spring detents 21 and a locking-disk controlling the motion of each pair of transfer wheels as shown in Fig. 3. To zeroize, the main counter spindle 29 is turned by the finger wheel 46, and in addition to rotating the numeral wheels, previously thrown out of gear with the setting-pirts, cam and lever parts are operated to lift the spring detents 27 out of action and to bring hooks on the end of arms 38 into the path of zero pins. The lateral positions of the totalizing-counter may be fixed by means of engaging parts in the frame thereof and the machine casing. A second frame 50 upon the carriage may.also' be rocked about the shaft 28 to set the machine for addition or subtraction.