Patent GB-243376-A (GB)
Abstract: 243,376. Reisser & Reder, Ing., and Reisser, A. Nov. 20, 1924, [Convention date]. Adding, multiplying, and dividing apparatus. - In a cam-disc and pin-wheel machine with a single-bank key-setting mechanism, the construction is such that the multiplicand - indicating drums may be utilized as an adding-counter, the entering of items therein by the keys being effected with the use of the cam discs or in a modification, without such use. Keyboard and differential mechanism.-Ten keys 22, Figs. 1 and 6, arranged in two rows have inclined surfaces 29 to co-operate with a spring - controlled frame 37 having cross-bars 34 and in the case of the significant digits the keys have inclined surfaces 31 to cause levers 39 pivoted on frame 37 at 41 to rock in a horizontal plane. The rear ends of these levers bear against corresponding discs 63 having five groups of circumferential teeth, the number of teeth in each group agreeing with the value of the correlated key increased by unity. The discs are slidably keyed on their shaft 46 and are urged to the left by spiral springs 64. Depression of a key thus slides the corresponding disc to the right into the plane of engagement with one of a series of pinions 66 each attached to anot'her pinion 67 and fixed on shaft 65. The differential movement imparted by the selected disc 63 is conveyed through these pinions to a gear wheel 76, Fig. 5, loose upon a boss 75 of a disc 74, and capable of sliding axially so as to be put in train with gear teeth 1 on a cam disc. There is a series of such gear wheels 76 and discs 74 corresponding with 'the number of denominations provided in the barrel. The shaft 46 carrying the discs 63 is driven by a spring in a casing 47, Fig. 8, the spring being energized as described below. Selecting denomination. Key depression not only swings a lever 39 as described above but pushes the frame 37 towards the rear so as to rock a pair of spring-controlled pawls 42, 45, Fig. 1, to free a ratchet-wheel 43 and allow the spring in the casing 47 to turn shaft 46 through one-fifth of a rotation and so impart the differential setting movement to shaft 65. The step-bystep motion of the ratchet-wheel is also conveyed to a shaft 70 on which the discs 74 are slidably keyed. These discs have cam surfaces 82 arranged in echelon so that as the shaft 70 is stepped onwards the cams in succession engage stationary arms 80 and produce a sliding movement of their members 74, 76 to complete the drive train through gear-wheel 76 to the corresponding cam disc. In another arrangement the step-by-step movement of the ratchet-wheel 43 is transmitted to a spirally-slotted sleeve controlling the lateral position of a guide-block an arm of which traverses an idle pinion axially to connect shaft 65 with the various cam discs in succession. An extension of the block is formed as a pointer to enable the denomination-selection to be effected manually. A further modification employing an idle pinion is also described, the pinion being shifted by bevel and rack gearing driven by the step-by-step gear. Spring motor for the setting-mechanism. The spring in the casing 47 is wound up by the rotation of shaft 46 through bevel and spur gearing driven by a toothed sector 56, Fig. 6, pivoted at 57 and provided with a handle 61 working in a graduated slot 60. The sector may thus be moved at the beginning of an operation to put the necessary tension on the spring, the sweep of the handle 61 being regulated in accordance with the number of denominations in the entry. The adding counter AK, Any items set up in the pin barrel through the mechanism above described are also entered in this counter by means of intermediate wheels 7, Fig. 1, adapted to mesh with the peripheral teeth 1 of the cam discs 2. Normally these teeth do not extend to the wheels 7 and allowance for this lost motion is therefore made, the teeth of the gear wheels 63 being increased by one as already stated. The wheels 7 stand normally in the plane of the cam disc teeth 1, but as soon as the operating crank handle is displaced from normal, a shaft 12 carrying the wheels is freed to move to the left under spring action so as to place the wheels out of the planes of the cam discs, the release of the shaft being effected by a cam in co-operation with an arm secured to the shaft 12. Resetting and other manipulations. The cam discs are restored without altering the reading on the adding counter AK, by the rotation of a nut 190, geared to rotate shaft 102 which by means of a lug 195 co-operating with a notched boss receives simultaneously an endwise displacement. Pins on the shaft are thus brought into the plane of lugs on wheels 103 and return them and the cam discs with which they gear, to normal position. The endwise shift of the shaft 102 also produces, by means of a lever 203 bearing against a collar 200, a movement of shalt 12 to the left to side-step the wheels 7 out of gear. This movement could also be performed directly and independently of the restoring-mechanism by means of a knob 189 attached to the shaft 12. An interlock is provided between the wheels 103 and the adding counter AK t'o prevent simultaneous rotation of the latter and the carrying out of an ordinary operation or the restoration of the cam discs, the device consisting of a notched slide 213, Fig. 7, disposed in rear of the counter and co-operating with the tails of pawls engaging the numeral wheel pinions, the slide being connected with a plate 205 which with the aid of a similar plate comprises the intermediate wheels 103. These plates are secured to shaft 204 which under spring action moves to the left when the knob 189 is shifted. The resetting wheels 103 are thus displaced to inoperative position whenever the shaft 12 is shifted for disengaging the wheels 7. A pawl 232 attached to shaft 204 co-operates with an eccentric boss on the resetting shaft 102 to maintain the shafts 12, 204 in displaced position. By positioning a hand-lever 240, this pawl 232 can be disengaged to permit knurled discs 98 to be manipulated to correct items in the counter and on the pin-wheels. The resetting operation will automatically free the pawl 232, and a disc 223 on shaft 102 will bear on an arm 221 to force the shaft 204 and therefore the wheels 103 into operative position. Using the counter AK for adding purposes. In the ordinary use of the machine, items set up in the pin-wheels are simultaneously entered in the counter AK and in order to sum these it would be necessary after each setting to use the restoring-nut 190 to return the cam-discs to normal position. A series of idle gear wheels mav be embodied in the barrel so that to add a number of items on the counter AK, the button 189, Fig. 7<a>, may be moved to shift' the wheels 7 out of engagement with the cam-discs and into engagement with these gear-wheels to convey the differential movement derived from the key depressed to the counter AK without passing it through the cam discs. The Specification, as open to inspection under Sect. 91 (3) (a) contains also the subject-matter described in Specifications 270,309, 270,341, 270,342, and 270,343, but not now included in this Specification.