Patent GB-404919-A (GB)
Abstract: 404,919. Multiplying-machines. S-CPATENT AKT.-GES., Schaffhausen, Switzerland. April 18, 1932, No. 11047. Void [Abridged as open to inspection under Sect. 91 of the Acts, July 19, 1932]. [Class 106 (i).] For each denomination of the multiplicand there is a group of nine sectors, each sector having nine equal sets of teeth, the number of teeth in a set varying with the digital value of the sector. The multiplicand is set by keys that cause slight displacement of the selected sectors into positions where they can be engaged and entrained by arms rocked by the main shaft so as to actuate the counting-mechanism. The extent of rotation of the sectors while in mesh with the counting-mechanism is determined by multiplier keys which, denomination by denomination, limit the amount of effective rotation of the sectors. The counting-mechanism consists of three counters serving to accumulate respectively the partial products of a complete multiplication operation, the products belonging to a single transaction, and all products. General structure. The multiplicand keys 79, Fig. 1, disposed in echelon select the sectors 2 arranged in groups of nine. On the left are the multiplier keys 52 controlling the sectors by means of discs 54 provided with spirally placed pins 55, Fig. 2, the discs becoming effective seriatim so as to vary the timing of disengagement of the sectors with elongated gears 5, 5a &c. actuating in common the different counters I, II and III. A slip may be inserted at 142 to be printed with the products, counter I being zeroized at the end of each complete operation and counter II only when permitted by the manipulation of a pin 151. Setting the multiplicand. A key 79 when slid upwards raises a bar 80, Fig. 3 and thus through a notch 81 rocks a lever 82 counterclockwise. The levers 82 are mounted in a carriage 84 traversable on a guide 86 rockable about a rod 85. When a lever 82 is thus set its point lies below the top of a lever 87 so that, in the action of the machine when the guide is rocked by cam 111 and link 108, the particular lever 87 selected is rocked counterclockwise to release at 90 a corresponding sector 2, mounted on an eccentrically-mounted shaft 1, and urge it slightly rearwards to a position where its notch 113 will subsequently be engaged by a cross-bar 114 that is carried by a pair of arms 67 mounted centrally of the machine and is controlled as to its radial distance by a stationary cam 118. The sector 2 shown in Fig. 3 corresponds with a digital value of five, the nine sets of teeth on the sector each possessing that number of teeth. The arms 67 are rocked by a system of alternative gear trains shown at 119, 120, 124, Fig. 1, whereby a continuous rotary motion derived from the main shaft is converted into a reciprocatory rotary motion for oscillating. Setting the multiplier ; multiplying action. The multiplier keys 52 are connected by links 51, with pivoted catches mounted on levers 46, 47 connected by pins 49, 50 to form a frame and controlling through a cross-bar 45 an arm 44 extending from the shaft 1. Between the levers 46, 47 are the discs 54 one for each denomination of the multiplier and these carry catch-levers 61 one of which may be rendered effective, for seizure by the cross-bar 114, so as to cause the corresponding disc 54 to be carried down with the selected sectors 2. When a pin 55 meets an operated catch the levers 46, 47 are displaced and turn the eccentricallymounted shaft to carry the sectors 2 out of mesh with the gears 5 &c., thus determining the number of repeated additions of the multiplicand set up. Varying denominational value of the partial products. After multiplication by the units digit of the multiplier the carriage 84 is shifted one step to the left by a cam groove 105 and lever 102, Fig. 1, to move the set multiplicand levers 82 one step to the left, thus for the next cycle selecting actuators of ten times the original values. The carriage in its movement to the left also shifts a cam rail 63 to disable the units catch-lever 61 and render the tens catchlever effective for coupling the tens disc 54 with the cross-bar 114 so that this disc will now travel with the sectors to control the duration of their engagement with the gears 5 &c. Counting-mechanism. In each denomination the gear 5 (5a &c.) is in train with corresponding numeral wheels of counters I, II, III mounted in frame plates 129 which are pivoted at 130, interconnected, and controlled from a camrocked lever 131. At the end of a complete operation this lever disengages the counters from the transmission wheels 9 and counters I and II are depressed upon the slip to print their totals. Transfer-mechanism. At each rotation of gear 5 a pin on it advances through pinion 27 a mutilated double gear wheel 22 one tooth space. This wheel is controlled by a spring 24 and by a spring detent 35 and continues to accumulate such transfers until at the end of an operation a toothed segment 29 on a wheel 28 driven from the main shaft operates the gear wheel 22 and thus transmits the stored transfers to the next higher gear. The pivoted frame carrying the wheels 22, 28 &c., is then allowed to rock under control of spring 42 and recess 41 so as to cause the detent 35 to release the wheel 22 to allow it to return to zero. Zeroizing-mechanism. Counters I and II are zeroized by a rack 149 reciprocated at the end of each complete operation by a segment 153. One end of the rack is pivoted to the remainder at 152 and normally travels on a conical pin 151. By adjusting this pin the operator can disable the end portion to prevent zeroizing of counter II so that this may continue to accumulate a series of complete products. Decimal quantities. When the multiplier contains a decimal fraction a decimal key 156, Fig. 1, may be depressed to effect lateral displacement of the counting-mechanisms through one or two denominational steps.