Patent GB-191017958-A (GB)
Title: A Calculating Machine, especially intended for Effecting Multiplication.
Inventor: RAUCHWETTER FRANZ
Filed: 1910-07-28
Granted: 1911-03-02
Abstract: 17,958. Rauchwetter, F. July 28. Multiplying - apparatus. - A machine, in which the multiplication is performed directly by the depression of the multiplier-key after the multiplicand has been set, is arranged so that a depression of the multiplier-key actuates all the parts in turn and on being fully depressed effects the registering of the products on the counting wheels and the return of the parts to their initial position. An arrangement of the machine for a single denomination of multiplicand and multiplier keys is shown in sectional elevation and plan in Figs. 17 and 19 respectively. Setting multiplicand. The multiplicand keys 2 slide vertically to depress a lever 4, the rearward end of which presses on an arm 3 of the setting-lever 1 pivoted at o. The keys are locked in their depressed position, until another key is depressed, by means of a sliding-plate 84 engaging notches in the key stem. The keys actuate the setting - lever 1 to rotate it an amount depending on the particular key depressed and hold it in the set position by means of a locking-arm 73 actuated from the lever 4 through a lever 77 and slotted slide 75. The lever is prevented from swinging beyond its set position by a spring-controlled locking- piece 81. Setting multiplier. The multiplier keys 7 are mounted on a shaft 46 and are connected thereto by a spring pawl 87. Each of the keys 7, on being depressed, is coupled to a corresponding cam 15 loose on the shaft 46. This coupling is effected by a pin 91, Fig. 21, on the key which engages a notch 92 in the cam-disk 15 and acts until the key is released, whereupon the cam moves to the right out of engagement with an arm 86, which is provided with a roller adapted to rest on the cam-surface. Under the influence of a spring 93, the cam immediately returns to its initial position, and is moved axially to allow the pin and notch to re-engage. The arms 86 are keyed to a shaft 85, on which is also fixed one of the arms of a link-work 10 ... 13; one member 11, 12 of the link-work has a frame 8 attached provided with guide-ways 96 in which works a slide 97 adapted to move along the lever 1. An arm 99 passes through a slot in the slide 97 and to the arm 99 is attached a rack 6, which rack, by the above-described arrangement, receives a movement proportional to the product of the numerals of the particular keys 2 and 7 depressed. Registering product. The rack 6 engages a sector 17 adapted to operate units and tens segments 27 and 23 respectively. To the sector 17 is attached a stepped disk 18, from which, through the levers 21, 24, the tens segment 23 is set. To the disk 18 a ring 32 is fixed and provided with teeth 31 on the inner edge to engage a planet pinion 25 mounted on an extension of the sector 17. The pinion 25 engages a sector 26 attached to the units segment 27. The transmission of the product set to the counting-wheels 38, 39 is effected successively on the return of the segments through the wheels 40, 41. The wheels 40, 41 are mounted on a transversely-sliding frame 100 provided with a rod 101 adapted to hold the units segment 27 until the tens segment 23 has been actuated; the movement of the frame then frees the units segment, which, under the control of its spring 28, moves to the set position. This movement is effected by the sector 26 rotating the pinion 25 to return the ring 32 until the pawl 34 engages one of the notches 33 of the ring. The wheels 40, 41 are arranged as shown in Fig. 20, so that, when the wheel 40 engages the tens segment, the notch in the rod 101 is in the position to allow the nose 103 on the segment to pass to set the segment. The return of the segments and the moving of the frame 100 is effected by the rotation of the spindle 46 through a segment 47 keyed thereon, and a pinion 49 mounted on a spindle 48 which pinion is adapted to rotate the spindle in one direction through a clutch 109. On the spindle 48 are mounted three cams 50, 51, 52 which are connected by the rods 44, 45, 53 respectively to the segments and the frame. A depression of a key 7 to its full extent causes a complete rotation of the spindle 48. In a modification the ring 32 for the units segment 27 is returned to its initial position to actuate the units segment by means of a pawl actuated through a lever by a cam on the shaft 48, instead of as above described by a spring 28. Transfer mechanism. - The numeral - wheels are in the form of rings 55 in which are mounted, on pins, bevel-wheels 57 gearing with pinions 58, 59 loosely mounted on the spindle 37. The pinion 58 is attached to the wheel 40<1> or 41' on the tens or units wheels 38 or 39 respectively, and the pinion 59 is attached to a wheel 60 or 60<1> on the other side of the wheels 38 or 39. The pinion 60<1> gears with a pinion 61, on the spindle of which is a fivetoothed star-wheel 63 adapted to be rotated at the instant of transfer by a pin 66 on the ring 55 of the lower wheel. The wheel 63 is locked by a cam-surface 64 on the ring 55. The transfer is effected on the actuation of the units wheel, that is, after the tens wheel has been actuated. A construction of the machine with several rows of multiplicand keys is described, the arrangement of parts being similar to that described above, but with a number of setting- levers 1 and a corresponding number of slides 97 and racks 6 depending on the number of rows of the keys. Modifications are also described in which (1) the setting-lever 1 is actuated from the keys 2 through a number of curved and pivoted levers, one of which rises to lock the keys as the other is depressed, and (2) the link-work 10 ... 13 is set by a special handle 131, Figs. 25 and 26. A lever 128 has a roller 129 engaging a cam on the spindle carrying the handle, one end of the lever engages an extension of the link-work, and the other end is slotted to receive a pin on a slide 134, which is provided with a projection 135 adapted to move in a slot in a slide 137. The slide 137 is set in position, depending on the key 7 depressed, by means of the curved levers 139, 140.