US2544426A - Visible setting control mechanism - Google Patents

Description

March 6, 1951 c. HERZSTARK 2,544,426

VISIBLE SETTING CONTROL MECHANISM FOR CALCULATING MACHINES Filed April 29, 1949 to each other.

Patented Mar. 6, 1951 VISIBLE SETTING CONTROL MECHANISM FOR CALCULATING MACHINES Curt Herzstark, Mauren, Liechtenstein, assignor to Oontina Biiround Rechenmachinenfabrik A. G., Mauren, Liechtenstein, a firm.

Application April 29, 1949, Serial No. 90,342

- InAuStria. May 15, 1946' 2 Claims.

. 1 In the known types of calculating machines with slidebar setting and Visible setting control register, the setting mechanism and the control mechanism constitute two devices entirely separate from each other but mutually connected by special coupling members.

The object of the present invention is to simplify the setting mechanism and control mechanism to the greatest possible extent as compared with previously known types, and to accommodate same in the smallest conceivable space such as is available, for instance, in a pocket-size calculating machine. To this end the setting members for the setting wheels are, according to the invention, mounted in such a way on the shafts carrying the control numeral rollers as to be axially movable and are coupled to said shafts. Accordingly, when the setting members are operated. the control numeral rollers are positively rotated, so that the figure set is visible in the window of the setting control register.

The drawing shows a typical embodiment of the device in accordance with the invention, in which drawing Fig. 1 shows the combined setting and control mechanism of one column of the calculating machine in considerably enlarged vertical section, Fig. 2 an appurtenant front elevation and Fig. 3 an elevation of a detail.

In the retaining plates I of the body of the calculating machine, the shafts 3 of the control mechanism and, behind them, the shafts 4 of the setting mechanism are mounted in the vicinity of the wall 2 of the case; only one of each of said shafts is illustrated in the drawing. The control numeral roller 5 is rigidly mounted on shaft 3, on e which shaft a setting member is so mounted as to be longitudinally slidable. In the case here depicted, said setting member is a slide-bar 6 which projects on one side, by a handle or knob I, from a longitudinal slot 8 on the wall 2 of the case, and

is provided on its other side with a projection 9.

Said pro ection 9 is provided (Figs. 1 and 3) with two bifurcations 9a, 9b ofiset at an angle of 90 The slide-bar 6 is coupled, in the axial direction of motion, to the setting wheel H] of the relevant column by means of the bifurcation 9a, whilst said slide-bar laterally embraces the bearing Illa of said setting wheel by means of recesses 912 provided in the outer ends of the bifurcation 9a. As a result of this lateral embracing of the setting wheel the slide-bar 6 is held in a simple manner, without the use of special guide means, against rotary movement. The setting wheel [0 is fixedly mounted on the bearing Illa which latter is so keyed to shaft 4 as to be slidable in the lengthwise direction of, said shaft, and is;

driven, when a numeral has been set, by the driving member, for example astepped roller H. The slide-bar 6 is retained in the set position by a retaining device. Said retaining device preferably comprises a ball l2 mounted in the hollow knob l and loaded by a compression spring l3 also accommodated in said knob. In the drawing the s1ide-bar 6 is shown in the zero position.

in this position, the ball l2 engages in a recess M in the shaft 3 and by the action of the spring l3 retains the slide-bar 6 with ufiicient firmness to ensure that said slide-bar can only be moved by overcoming the pressure of said spring.

The slide-bar '6 is positively connected to the shaft To this end the shaft 3 is provided with a spiral groove I 5 into which projects a radial pin iii of the slide-bar 6. Along a curve corresponding to the spiral groove l5 are provided, in addition to the recess l4 corresponding to the zero position of the push-bar. nine further recesses 14 for the Figures 1*!) which may possibly be set. The longitudinal slot 8 serves at the same time as a sight hole for the control numeral roller 5 and is of such width'that only one figure 0n the roller 5 is visible.

In the device described, when the slide-bar 6 is displaced, the ten-figure numeral roller 5 is rotated according to the figure operated, so that the combined figure set can be readily seen in the sight holes and. if it has been wrongly set, corrected before being transferred to the counting mechanism.

To enable the entire unit, i. e., the shaft 3. the push-bar 6. the retaining device l2, l3 and the numeral roller 5 to be laterally removed integrally from the machine or integrally placed therein without it being necessary to unscrew or otherwise move the retaining plates l, the shaft 3 is mounted on centres I! constituted by the free ends of screws 18 fitting in threaded holes in said plates I. With this svstem of mounting. the shaft 3 with the setting wheel l0 may also. if required, be finely adjusted to the driving member II.

I claim:

1. In a calculating machine, a setting mechanism with visible setting control register setting members for setting Wheels, the said setting members being so mounted on shafts carrying a control numeral roller, as to be axially slidable, the said setting members being coupled to said shafts, so that when the setting members are operated the control numeral rollers are simultaneously and correspondingly set, the setting members consisting of slidebars provided with lateral extensions projecting toward the center axis of the machine and having two bifurcations, said bifurcations being provided with a recess at their outer ends, said extensions being coupled through said bifurcations in the axial direction of movement of the setting wheels, while slidable bearings on which the setting wheels are fixed, are received by the recess of said bifurcations whereby said setting members are held against rotation.

2. In a calculating machine, a casing having a wall provided with straightlongitudinally extending slots, a setting mechanism with visible setting control register setting members for setting wheels, rotatable shafts on which said setting members are slidably and rotatably mounted, handles on said setting members and extending through said slots, a control numeral roller fixedly mounted on each of said shafts, a spiral groove in each shaft and pins on said setting members projecting into said grooves, and a plurality of recesses extending along said spiral grooves in said shafts and engageabie by a yieldable member carried by said setting member, whereby upon slidable adjustment of said setting members by means of said handles, said control numeral rollers are simultaneously rotated and set, the setting members consisting of slidebars provided with lateral extensions projecting in the opposite direction from said handles and having two bifurcations, said bifurcations being provided with a recess at their outer ends, said extensions being coupled through said bifurcations in the axial direction of movement of the setting wheels, while slidable bearings on which the setting wheels are fixed are received by the recess of said bifurcations, whereby said setting members are held against rotation.

CURT HERZSTARK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 938,790 Rein Nov. 2, 1909 1,011,617 Hamann Dec. 12, 1911 2,482,935 Rast Sept. 27, 1949 FOREIGN PATENTS Number Country Date 256,315 Germany Feb. 5, 1913

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