Patent GB-191210148-A (GB)
Title: Improvements in or relating to Calculating Machines.
Inventor: PISCICELLI ROBERTO TAEGGI
Filed: 1912-04-29
Granted: 1913-04-29
Abstract: 10,148. Piscicelli, R. T. April 29, 1911, [Convention date]. Multiplying and dividing apparatus; transfer mechanism; zeroizing- mechanism; keyboard interlocks. - Relates to an electricallv - driven multiplying &c. machine of the pin-wheel and cam - disk type having the following features: (1) setting - mechanism mounted independently of the pin-wheels but engaging therewith for setting the multiplicand, after which it is disengaged from the pin-wheels; (2) a multiplicand-indicator; (3) a multiplying- key which establishes the motor circuit, maintaining the circuit till the required number of revolutions of the main shaft is shown by a multiplier-indicator, and also is adapted to move the series of actuating pin-wheels laterally to engage in turn the receiving-wheels; (4) product-indicating wheels; (5) a counter for summing the separate products actuated by a totalizing-key which establishes the motor circuit in the reverse direction and zeroizes the product and multiplier indicating-wheel; (6) a counter for indicating the number of products thus totalized ; (7) transfer-mechanism; (8) zeroizing-mechanism manually actuated or driven by the main shaft of the machine; (9) various interlocking means and devices for ensuring correct co-operation of the parts of the apparatus. (1) The setting- members 14, Fig. 2, consist of partly toothed disks provided with handles 1 co-operating with scales 2. The disks actuate toothed cam-disks 22, which as usual project a number of the teeth 29 of the pin-wheels corresponding to the setting. During the differential setting of the cam-disks and pin-wheels, the latter are prevented from rotating by a toothed comb 87, Fig. 3. (2) The disks 14, which actuate the cam-disks 22, simultaneously cause the given multiplicand to be exhibited by the multiplicand indicator 17 through pinions 16. (3) The multiplying-key 5, Fig. 2, which is pivoted horizontally at 58 and vertically at 55, can be moved laterally along the horizontal slot shown, and by means of a slide 62, 64, laterally positions the series of actuating pin-wheels. When the key is in its correct lateral position, the depression thereof into a vertical notch 6 gives by means of a lever 67, 68 and link 70 a rocking movement to a contactdrum 71, thereby establishing the motor circuit through spring plungers or contacts 73. A latch 83, 84, Fig. 16, is withdrawn from a notch 85 in a disk attached to the shaft 33 and this shaft is thereupon driven by the motor through friction gearing 74, 75, Fig. 13, with which it is constantly coupled, toothed gearing 77, 78, and a pawl and notched disk 79, 81. Rotations of the shaft 33 are indicated on the multiplierindicator 44, Fig. 3, through a single tooth 41, Fig. 3, and gearing 42, 43. (4) The product is shown on the wheels or drums 38, Fig. 2, which receive the movement of the pin-wheels 32 through receiving-wheels and pinions 36, 37. (5) The depression of the totalizing-key 9, Fig. 21, connects the product-totalizing drums 127, Fig. 2, and product counter 38 through a series of wheels 125, 124, of which the wheels 124 are mounted on a frame 122 pivoted on the shaft 121. This key also establishes a circuit in the reverse direction by means of a contact drum 174, Fig. 21; the shaft 39 is rotated through the shaft 35, and is moved transversely by a cam thereon to cause pins on the shaft to cooperate with corresponding pins on the drums 38, 44, the product and multiple counters are thus returned to zero, and the product totalizer is actuated to the extent represented by the sum shown previously on the product counter. (6) The accumulation of any product on the product totalizer is accompanied by the rotation of the shaft 66, Fig. 3. A finger 154 on the shaft actuates the counter of the totalized products through the train of wheels 155, 156, 157. (7) The product-indicating drums 38, Fig. 9, are provided with single-toothed disks 45, which, at transfer, rock pivoted cam-arms 46 towards the pin-wheels 32. The cam-arms displace laterally pivoted transfer teeth 51, causing them to actuate the drums 38 through the intermediate wheels 36. The cam-arms are restored by cams 52 on the pin-wheels. Somewhat similar arrangements 140....149, 160 of transfer mechanism are used in the case of the product totalizing drums 127 and the counter 152 of the totalized products. (8) The automatic zeroizing of the product &c. indicating-wheels has been explained in (5) above. These wheels may, however, be zeroized by the manual rotation of the shaft 35 through the cam and pins previously described, and the product totalizer and the counter of the totalized products are zeroized in a similar manner. (9) Interlocking- means are provided for (a) the multiplying-key and the totalizing-key, and (b) the totalizing- key and the zeroizing-means, and also to prevent the counter of the totalized products from being actuated more than one unit at a time.