Patent GB-190727446-A (GB)
Title: Improvements in or relating to Calculating Machines
Inventor: BOLLINGER ALEXANDER
Filed: 1907-12-12
Granted: 1908-08-06
Abstract: 27,446. Bollinger, A., Landry, A., and Landry, E. Dec. 13, 1906, [date applied for under Patents Act, 1901]. Typewriters and like machines.- Pin-wheel and camring g calculating- machines of known types, having relative lateral movement between the setting - mechanism and the totalizing-counters whereby they are adapted for the four rules, are provided with a keyboard for selectively moving the cam - rings, with means for preventing the normal restoration of such rings in the case of multiplication or division, and with a printing-attachment. Four pin-wheels 2 ... 5, Figs. 1 and 2, are secured to a drum b which is capable of movement longitudinally together with all the setting and actuating parts upon the main driving-shaft a, and each has a cam-ring 7 ... 10 with a symmetrical groove, two opposite quadrants of which retract while the other two project the lateral lugs 6<a> upon the pins 6. During an addition, the driving-shaft makes a complete revolution, while each cam-ring makes half a revolution relatively thereto, in the opposite direction ; the first half of the movement is concerned with the projection of the pins according to the key depressed, and the second half with the operation of the totalizer receiving-wheels 18 and the retraction of the pins. The keys 13 are looked, save at the rest position of the handle, by a laterally movable locking-plate 29 operated by a pivoted lever 30 and a cam depression on the end plate of the drum ; when depressed, one key only in each bank is held down by the pivoted spring yoke 23, and its lower end forms a stop for one of the projections 16, 16<a>, 17, 17<a> with which each cam-ring is provided, but upon simultaneous displacement of all the yokes when the handle has made half a revolution by the camming action of the rib 20, the depressed keys rise until held by the locking-plate and no longer arrest the cam springs ; the partial depression of these keys gives an indication of the number set. The retraction of the pins during the second half of the revolution is effected by the contact of the lugs 25 with stops 26<a> projecting from the bar 26, such bar being displaced either laterally or upwardly by means of a cam upon the drum directly the camrings and their pin-wheels have come into normal relation. An error key 33 is provided for unlocking any depressed keys. The numeral wheels 37, Fig. 6, of the totalizer are actuated through the train shown, and overrunning is prevented by means of convex locking-plates 39, 40 on the pinwheels and cam-rings respectively adapted to engage the concave surfaces of the Geneva wheel 18<b>. To permit of multiplication and division, the restoring-stops on the bar 26 must be moved out of the path of the lugs 25 upon the cam-rings by depression of the multiplication key 52, Fig. 11<a>, of which the lower end slides the bar laterally, the projection 52<a> becomes locked down by the arm 53 of a double pawl 53, 53<a>, and the chamfered edge 52<b> operates the locking-plate. To unlock this key, another 55 is depressed, whereby the other arm 53<a> of the pawl is forced backwards, but this can only be done when the handle is in the rest position. Alternatively, the bar 26 is moved radially out of action whenever the handle reaches the rest position, and the operation of a multiplication lever interposes stops which prevent its return. Whenever the machine is set for multiplication, the lever 74 is locked to raise the gap 75<b>, Fig. 6<c>, and therewith the single tooth 73, so that upon the next rotation of the sector 80 the holder of this toothmay move round in engagement with the outer circular slot 78 of the two in the fixed disk 76 and thereby operate the actuation register 83. For the purpose of printing items and totals, types are provided upon quadrants of the cam-rings and upon the wheels 34<a> of the totalizer train, together with a record strip 95, a roller platen 96, and an ink ribbon 97 ; the platen is journaled in a slide 99 constrained between two plates 100, 101, and is capable of operation either by the pin-and-cam slot engagement 99<a>, 102<a>, with the disk 102 on the main shaft to print an item, or by cams 106 and fixed lugs 105<a> to print a total from the wheels 34<a> whenever the spindle 103 is specially rotated by hand. In either case a suitable rotation is given to the platen in order to feed the paper.