Patent GB-187596-A (GB)
Abstract: 187,596. Seguin, A. Oct. 18, 1921, [Convention date]. Multiplying and dividing apparatus having means for setting both factors and employing members bearing representations of the partial products comprises members for setting the multiplier in reverse order actuated by rotary drums, and sliding members for setting the multiplicand the former being successively brought into contact with the sliding members when the totalizing-counter carriage is reciprocated, the counter being actuated in one direction through pinions adapted to engage the partial product tooth racks of the rotary drums. A construction for multiplying two numbers of three figures is shown in Figs. 1 and 2. On a central spindle 9 are loosely mounted three sleeves 10, 11 and 12, to which at one end thereof, are adjustably secured, as by a set screw, three radial arms 25, 26, and 27. At the other ends are fixed radial arms 22 carrying spring strips 16 adapted to engage one of a series of holes 19, 19<1> &c. in the rotatable drums 13, 14 and 15 which are divided into ten sectors, numbered 0-9 of which 4, 5 and 6 are shown in Fig. 4, having toothed racks parallel to the shaft 9 representing the units and tens of the partial products of the digits by themselves and adjusted in such a manner that any particular sector may be brought opposite a reference mark, the setting of the drums 13, 14 and 15 corresponding to the hundreds, tens, and units, respectively of the multiplier. The setting of the multiplicand is effected by sliding graduated rods 35, 36, and 37, through apertures in a longitudinally slidable spring-controlled rod 29. A screw 30 engages a slot in the rod to prevent it turning and a spring 31 constantly urges it to the right, the successive step-by-step movements being controlled by pins 41-45 on the shaft 29 and plates 46, 47 secured to the shaft 9 and oscillated thereby through an arm 48 adapted to engage the sloping face of a cam 51 carried by the totalizing-counter carriage 52 when the carriage is slid along the guide rods 7, 8. The rods 35-37 act as stops for the arms 25-27 and a pin 82 on the plates 46, 47 is adapted to move the arms 25-27 out of contact therewith during the shifting of the carriage. The carriage 52 is provided with lugs supporting a vertical shaft 55 carrying gear wheels 56, 57 adapted to mesh with the units and tens teeth of the racks on the drums and with the gear wheels 62-67 of the totalizer numeral wheels of ordinary construction. The successive engagement is effected on the reciprocation of the carriage by means of studs 66, 69, 70, 71, 72 on a stud shaft 58a. A spring-controlled shaft 58 and the shaft 58a act as pivots for plates 59, 59<a> which support the spindle 60 of the totalizing- counter. The plate 59a is provided with a notch and with a plate 74 having a notch out of alignment with that of the plate 59a and serves as an escapement for the studs 68-72. The plates 59, 59a carry a rod 77 on which is mounted the operating handle 79 which when the carriage is pulled to the right rocks the plates 59, 59<a> to free the totalizing-counter from engagement with the gear wheels 56, 57, the return movement being effective to actuate the numeral wheels. The rocking movement of the plates 59, 59<a> is limited by a pin 80 which, in its extreme positions, engages the carriage 52 and a pin 81 thereon. The drums may be returned to this initial position directly and the shaft 29 and plates 59, 59a may be reset by shifting the escapement mechanisms clear of the pins 41- 45 and studs 68-72 respectively; in the latter case the pin 80 is removed. To print the result a reel carrying a paper strip may be mounted at the right hand end of the machine and be adapted to receive an impression from the totalizer numeral wheels which would carry type, the reel being advanced a step after each forward and return movement of the total izing-counter carriage.