Patent GB-190703764-A (GB)
Title: Calculating Machine.
Inventor: GORIN FREDERICK PROCTOR
Filed: 1907-02-15
Granted: 1907-11-14
Abstract: 3764. Gorin, F. P. Feb. 15. Calculating - apparatus. -In a single-bank, keyset machine for addition and subtraction, the operation is derived from the lateral spacing motion of the spring-impelled, denomination-selecting carriage, which at each step rotates the main counter spindle through an angle proportional to the value of the key last depressed ; all the numeral wheels are normally locked to, and rotate with this spindle, but the particular wheel which is receiving is disengaged and held stationary, and it is therefore necessary when reading the total to adjust the spindle to its initial position. Improvements are also described in the transfer and spacing mechanisms, and the overthrow - preventing parts. Fig. 1 shows the machine in plan, and Figs. 22 and 27 in transverse section. The key-levers operate a universal bar 103, which controls the spacing by rocking a set of carriagearresting disks 95 loose upon the shaft 89 so that gaps therein may come opposite a pivoted finger 199 upon the carriage 60, which travels upon sliderods 63 and has a spline 61 for arresting the counter wheels in turn ; simultaneously, a transverse key-locking slide 131 with slots of varying inclination is operated to adjust a stepped stop for the differential yoke 121, which through link-work and a rack and pinion rotates the shaft 89 and thence, by actuating segments 160, 161, and an add-or-subtract clutch with spur-wheel reversing-gear, one of two pinions, which move loosely by ratchet-connexion upon the main counter spindle 25, but upon restoration of the segments actuate the spindle. Fig. 15 shows the gaps in the carriage-arresting disks through which the finger 199 passes, and also the cams 93, 94 secured to the spindle 89 which restore the segments so as to actuate the counter spindle ; similar cams 86, 87 upon a lower spindle engage with a second projection from the carriage to restore the universal bar and the disks 95, thus limiting the step of the carriage. Fig. 5 shows two adjacent numeral wheels 30, which are of the form of long pinions with wedge - ended teeth recessed for a numeral ring, and ride loosely upon the spindle ; with each wheel are associated a distance-piece 54, fast to the spindle, and a pinion 35 loose thereon but normally locked to a fast transfer cam 34 by a pin from the spring-held disk 36, which passes through both. The spline of the carriage 60 enters the gaps between the teeth of the main wheel, and at the same time, as shown, the carriage itself depresses the vertical arm of a lever 50, whereby the detent 49 is lifted and the bolt 42 slid out of gear with the pinion 35, the connexion between the numeral wheel and the spindle being thus broken in order that the wheel may remain stationary while the carriage is in the position shown. Transfer is effected by a spring arm 59, Fig. 8, attached to the lower numeral wheel and bearing upon the fixed cam 34, into the recess of which it moves radially at the transfer point, thus locking the pinion of the higher wheel to the arrested lower wheel during one-tenth of a revolution as determined by the gap in the cam ; this action is rendered possible by a second spring arm 56, Fig. 12, recessed in common with the transfer arm and locking-bolt between the long teeth of the numeral wheel, which temporarily withdraws the disk 36 and thereby breaks the connexion between the fast cam 34 of the higher wheel and its pinion 35. The transfer motion is also defined by a roller on a spring arm which engages a shoulder upon the distance-piece. The total reading and detent parts for the totalizing- counter are shown in Fig. 22 ; a disk 162 fast upon the spindle is locked by a spring tooth 172 upon the differential yoke, which also carries a plate 173 for determining the zero position of the spindle by locking a pin thereon, and the ten positions of the spindle are defined by slots in - the disk co-operating both with this tooth and with a spring detent 165, which is put into positive engagement by the final downward movement of the universal bar, but is thrown out of gear upon hand depression of the rack-rod 187. This rod also depresses the spring tooth upon the differential yoke, places a stop 194 in the path of the zero pin, and by means of the pinion 177 and a cam and pawl forming the equivalent of a simple ratchet clutch, rotates the spindle until it returns to its initial position, in which it remains when the rack-rod returns. The counter wheels may be zeroized by the addition of complementary numbers, and impossible operation is prevented by locking of the transfer parts ; the spacing takes place from left to right, the carriage having previously been carried to the extreme left by a hand-lever ; a spacing or zero key is also provided.