Patent GB-186071-A (GB)
Abstract: 186,071. Aktiebolaget Original-Odhner. Sept. 19, 1921, [Convention date]. Multiplying and dividing apparatus. - A machine particularly adapted for calculating with some special system of measures, currency, weight, &c. comprises a pin-wheel and cam-disc setting mechanism, an ordinary totalizing- counter and a revolutions counter, both carried on a laterally-movable carriage and means for connecting the setting mechanism to the revolutions counter in such manner that the required number in decimals appears on the ordinary totalizing-counter as soon as a given number or numbers (e.g. the given numbers of currency) or a number found by calculation, respectively, appears in the revolutions counter. The invention is illustrated for calculations in pounds, shillings and pence. The shaft 2 of the setting mechanism is geared to the crank shaft 1, so that it rotates at the same speed but in an opposite direction to shaft 1, and is geared by wheels 3, 4, 5 to a coupling shaft 6, so that the latter rotates at the same speed and in the same direction as the shaft 2. Slidably keyed to shaft 6 are grooved coupling wheels 7, 8, 9, 10 engaged by levers 16, 17, 18, 19 and carrying wheels 7<a>, 8<a>, 9<a>, 10<a> having 1, 2, 2 and 4 teeth respectively. Keys 13, 14, 15 have slots 22 with which the ends of the levers 16, 17, 18, 19 engage, so that on depressing, say, the pound key 13 the lever 16 is moved so that wheel 7<a> gears with its respective transmission wheel 11, which drives the revolutions counter 12. The key 13 is held depressed by a projection 24 and a pawl 25 and for each rotation of the crank-shaft 1 the driving wheel 11 will advance one tooth and turn the figure wheel accordingly. When the given number of pounds appears in the revolutions counter 12, the shillings key is depressed, whereby the pawl 25 which is common to all three keys, releases key 13 and engages key 14. The crank shaft is again rotated (after the carriage has been advanced) for setting the number of shillings. Similarly with the pence key 15 which controls two levers 18, 19. The number of pounds, shillings and pence having thus been set in the counter 12, the result can then be read on the ordinary totalizing-counter. The tens-transferring mechanism comprises a shaft 28 rotating at the same speed and in the same direction as the shaft 1. Slidably mounted on the shaft 28 are sleeves 29, carrying wheels 30 each having two teeth, one tooth for transfer of tens in the multiplying direction and the other for the dividing direction. Each figure wheel except that on the extreme left, has a corresponding sleeve 29 controlled by spring-actuated levers 32. When the figure 9 of a figure wheel occupies the spy hole, a shoulder on that figure wheel moves the sleeve 29 against the action of lever 32 so that the wheel 30 gears with the toothed wheel of the next figure wheel to the left. By having the correct number of teeth on the wheels 7<a> &c. the device can be adapted for calculations in yards, feet and inches, tons, hundredweights, quarters and pounds &c. Specification 13700/90 is referred to. The Specification as open to inspection under Sect. 91 (3) (a) comprises also a modification, shown in Fig. 6 (Cancelled), in which the wheels 7<a>, 8<a>, 9<a>, 10<a> are carried on a sleeve 33, slidably keyed to shaft 6 and having a groove 38 engaged by a pin 37 on a bell-crank lever 35 pivoted at 36 to the coverplate of the machine. The other end of this lever has a pin 39 engaging in a slot 40, 41, 42 in a plate 43 adjustable on a guide 44 fixed to the totalizing-counter carriage. As the carriage is moved from right to left the slot 40, 41, 42, causes the lever 35 to move about its pivot and move the sleeve 33 so that the wheel 7<a> &c. are caused in turn to engage with their respective transmission wheels 11. This subject-matter does not appear in the Specification as accepted.