US2106807A

US2106807A - Zero resetting mechanism for reg

Info

Publication number: US2106807A
Authority: US
Publication date: 1938-02-01
Anticipated expiration: 1955-02-01

Description

ZERO RESETTING MECHANISM FOR REGISTERS Filed June 5, 1935 IN VENTORS:

fiZzrZLacke Rude? Bran/$51562 Patented Feb. 1, 1938 PATENT OFFICE ammo:

ZERO RESETTING MECHANISM FOR REG- ISTEBS Karl Locke and Rudolf Brunhnber, Berlin- Tempelhof, Germany Application June 5, 1935, Serial No. 24,996 In Germany August 2, 1934 14 Claims.

The present invention relates to improvements in zero-resetting mechanism for calculating or adding machines and the like, and more especially to calculating and similar machines having a counting mechanism with index-indicator wheels or rollers, arranged with parallel axes, on the shafts of which wheels or rollers, heartshaped clearing cams are provided which serve to set the counting indicators back to zero, thus to clear the machine.

Hitherto, in resetting mechanism of this kind, the heartshaped clearing cams, and with them, the index-indicator wheels are set back to zero by means of a sliding bar, which moves in a longitudinal direction of the counting mechanism. This method has the disadvantage that the initial resetting means for setting the clearing sliding bar into action, must be fixed to the carriage itself, because if attached to the rigid machine frame, the resetting or clearing operation is possible only when the slide is in a terminal position. A further disadvantage of this known arrangement is that the resetting or clearing slide has to move a comparatively extended distance and, being heavy, has considerable inertia and thus this load must be accelerated or retarded. This slows down operation and renders such an arrangement impracticable for machines with rapid action.

According to the present invention the resetting or clearing cams are not activated by a Ion-'- gitudinal motion of a bar, or the like, but by means of a rotary or oscillatory means set on an axis and located diagonally or across to the index wheel shafts. This means, in its preferred embodiment is in the form of levers, or in the form of sector arms, keyed to a joint horizontal shaft. The operation of these clearing levers or sector arms may be accomplished by turning their common shaft by hand, or by means of an operative rod or bar shiftably mounted on the machine frame, which in every tens carry-over position of the adding mechanism carriage stands opposite one of the clearing levers or sectors and whose function may be caused by direct pressure on an operative key or by coupling it to a lifter, driven by the motor of the machine.

In the drawing,

Fig. 1 represents a fragmentary cross-section of the counting mechanism carriage of an adding machine with two counting mechanisms, fitted in accordance with the new arrangement;

Fig. 2 shows a longitudinal section horizontally taken on line l-| of Fig. 1,1ooking in the direction of the arrows, and

Fig. 3 is a sectional view, taken on the line l3, Fig. 2, looking in the direction of the arrows.

In both views only such parts of the rigid machine frame are indicated as is necessary to a clear understanding of the invention, such parts serving for the support of key levers and to guide the operating rods.

The counting means carriage I, Fig. l, is slidably mounted on the rigid machine frame (not shown) by means of the

slide rails

2 and 3. On said carriage are mounted two sets or groups of index wheel-shafts 4. Each of the index wheelshafts 4 is provided in the known manner with an index wheel 5, a clearing cam 6, a tens carryover lever I and a pinion 8, and each index wheel-shaft 4 is pivoted at its opposite ends 9 in the carriage plates 9' and 5".

Along each group of the index wheel-shafts 4 and mounted transversely to said shafts is mounted within the counting means carriage a rockable clearing shaft I0, and on each of these shafts are fixed a plurality of spaced sectorshaped clearing levers II, respectively cooperative with the clearing cams 6 to restore the index wheels to zero position, when the levers II are operated.

The sector-shaped levers ll may be simultaneously operated by the reciprocation of the clearing bars l3 and H, as will be explained below; and they may also be operated by manipulating a wing shaped lever 28, shown in dotted lines at the right of Fig. 2, which wing lever is fixed to one end of each of the shafts l0, so that the levers H, may also be moved to restore cams 6 to their zero position, by an oscillation of shaft i0, through manipulation of the wing lever 28.

Near the handle 28, the shaft l carries fast thereon an arm 29, having a hooked outer end movable in an arcuate recess on the edge of the bearing plate 30. This hooked end is yieldably pressed into engagement with a stop face 21 of the plate 30 by means of a coil spring 26, on the shaft, having one end secured to the machine frame and the other engaged against the arm 29, thereby pressing the hooked end against the stop face 21 thereby yieldably holding the shaft in and levers H in their normal inactive position. The plate 30 also serves as a bearing for the shaft III.

Slidably mounted in the machine frame are clearing bars I! and I4 operative in substantially a vertical direction. At the upper end of each of the bars li -l4 is a roller l which strikes whichever clearing sector II is above it, when the bar is lifted for clearing. The operation of the bar I3 is done by means of a key-lever H, which is pivoted at l6 to the machine frame. The key-lever has at one end a key 18, while the other end is connected by a pivot IS with the clearing bar l3. In this way the pressure on key l8 effects the clearing.

In case the back-to-zero cancellation is to be effected by a motor driven means, then, as indicated in Fig. 1 for the clearing bar It, the key 20 carried on key lever 2|, pivoted at 22, is connected to push-rod 23, the other end of which is connected to rod H, by means of a slotted opening connection 24 and a trunnion 24. By pressureon the key 20, the push rod 23 gets into the path of an operative extension 25a of a rotative cam 25, driven by the motor (not shown) of the machine, thus causing the lifting of rod l4 and thus operating clearing restoring means.

The manner of operating is as follows: The pinion shafts 4 are in random position after the adding operation. The clearing shafts I0 with their appurtenant clearing sectors II are in the starting position, indicated by full lines Fig. 1, in which position they are held by the stop 21 and the spring 26. The clearing sectors II are outside of the path of the circle described by the high points of the clearing cams 6, during adding operation. When the shafts H! are rotated in the previously described manner, by lifting the rods I3 and M, the individual sectors l I act on the cancellation cams 6 to rotate them until they touch the flat portions of said cams thus causing their rotative restoration to zero, and leaving them set in the zero position. After clearing, the shafts ID are brought back to the initial, starting position by their springs 26. The edges of the clearing levers l I, where they contact with the clearing cams 6 preferably are sharpened.

It is to be noted that the rotation of the clearing shafts I0 may also be done by hand by means of a wing lever 28, Fig. 2, which is movable with and carried by the carriage.

We claim:

1. The combination in a calculating machine or the like, having a counting mechanism, including a plurality of parallel rotatable shafts having indicator wheels fixed thereon, comprising clearing cams on said shafts, and clearing means rockable about an axis adjacent and substantially transverse to the axis of said shafts and adapted to engage said clearing cams to restore said indicator wheels to their initial position.

2. The combination in a calculating machine or the like having a counting mechanism, including a plurality of parallel rotatable shafts having indicator wheels fixed thereon, comprising clearing cams on said shafts and clearing means rockable about an axis located transverse to the axis of said shafts and adapted by engaging said clearing cams to restore said indicator wheels to their initial position, said clearing means comprising a clearing shaft having mounted thereon a number of fixed clearing arms equal in number to the number of said clearing cams, each of said clearing arms being adapted to engage a related one of said clearing cams.

3. The combination in a calculating machine or the like, having a counting mechanism including a plurality of parallel rotatable, spaced shafts having indicator wheels fixed thereon, comprising clearing cams fixed on said shafts, and spaced clearing means rockable about an axis adjacent and substantially transverse to the axis of said shafts, said clearing means comprising a clearing shaft having fixed thereto a number of clearing arms equal in number to the number of said clearing cams, said clearing arms being adapted to engage said clearing cams respectively, means for rocking said clearing shaft in one direction, and means on said clearing shaft for automatically restoring said clearing shaft in the opposite direction.

4. The combination in a calculating machine or the like, having a counting mechanism, including a plurality of parallel rotatable shafts having indicator wheels fixed thereon, comprising clearing cams fixed to said indicator wheelshafts, a clearing shaft operatively mounted transverse to the axis of said indicator wheelshafts, a plurality of sector discs rigidly connected to said clearing shaft and adapted to operatively engage said clearing cams, means to rock and stop said clearing shaft in one of its directions of rocking, means to automatically restore and stop said clearing shaft in the opposite direction of' rocking, said automatic means comprising a movable spring actuated lever on said clearing shaft and key levers to move said sector discs.

5. In a calculating machine, a plurality of indicator-shafts each having a clearing cam thereon, the combination of a clearing shaft mounted for partial rotation; light weight thin clearing levers mounted fast on said clearing shaft, one for each indicator and each adapted, when the shaft is rocked slightly, to engage the associated clearing cam for restoring the indicator; the mass-acceleration of said shaft and levers being slight during rapid operation and requiring relatively small power.

6. In a machine comprising a frame, a carriage slidable thereon, and indicators on the carriage, the combination of means mounted on the carriage for restoring all of said indicators, said means including motive members traveling with the carriage when the latter travels; and operating means movably mounted on the frame and adapted to cooperate with one of said motive members at each of several positions of the carriage in its travel.

7. In a calculating machine comprising a nontraveling frame, a carriage slidable thereon and indicators in the carriage, the combination of means mounted on the carriage for restoring all of said indicators, said means including motive members spaced along the carriage; and nontraveling operating means movably mounted on the frame for movement perpendicular to the path of the carriage, and adapted to cooperate with one of said motive members whenever the carriage is in one of several positions.

8. In a calculating machine comprising a nontraveling frame, a carriage slidable thereon and indicators in the carriage, the combination of means mounted on the carriage for restoring all of said indicators, said means including motive members; and operating means movably mounted on the frame and adapted to cooperate with one of said motive members in each of several positions of the carriage, and adapted to operate the restoring means without danger of moving the carriage and interfering with the operation of the machine.

9. In a calculating machinejcomprising a machine frame, a carriage slidable thereon, a pinrality of indicator-shafts each having a clearing cam thereon, the combination of a clearing shaft mounted on said carriage; clearing levers mounted fast on said clearing shaft, one for each indicator and each adapted, when the shaft is rocked, to engage the associated clearing cam for restoring the indicator; and a clearing bar mounted in the frame for movement toward an adjacent clearing lever and engageable with one of the clearing levers in each of several positions of the carriage.

10. In a calculating machine comprising a machine frame, a carriage slidable thereon, a plurality of indicator-shafts each having a clearing cam thereon, the combination of a clearing shaft mounted on said carriage parallel to the path of the carriage, and mounted on the carriage for partial rotation; clearing levers spaced along and mounted fast on said clearing shaft, one for each indicator and each adapted, when the shaft is rocked, to engage the associated clearing cam for restoring the indicator; a clearing bar slidably mounted in the frame for movement toward an adjacent clearing lever and having its upper end positioned to be engageable with one of the clearing levers only whenever the carriage is in one of several positions; and an operating lever engaging said bar for operating the same.

11. In a calculating machine comprising a machine frame, a carriage slidable thereon, a plurality of upright indicator-shafts each having a heart-shaped clearing cam thereon, the com-. bination of a clearing shaft mounted on said carriage parallel to the path of the carriage and movable with the carriage when the carriage moves, and mounted on the carriage for partial rotation; sector-shaped clearing levers mounted fast on said clearing shaft, one for each indicator and each adapted, when the shaft is rocked, to engage the associated clearing cam for restoring the indicator; a clearing bar slidably mountedin the frame for movement, toward an adjacent clearing lever and having a roller on its upper end engageable with one of the clearing levers whenever the carriage is in one of several positions; an operating lever engaging said bar for operating the same; an operating cam; and

means for engaging the operating lever with the cam to operate such lever.

12. In a calculating machine, indicators; clearing means for restoring all of said indicators, said means including a motive member; a clearing bar slidably mounted for movement toward the motive member and having its upper end engageable with the motive member; an operating lever engaging said bar for operating the same; an operating cam; and means for engaging operating lever with the cm to operate the operating lever.

13. A device for simultaneously restoring the indicators of a machine having a plurality of indicator-shafts each having a clearing cam thereon, said device comprising a clearing shaft mounted for partial rotation; light weight clearing levers mounted fast on said clearing shaft, one for each indicator and each having its outer active end adapted, when the shaft is rocked slightly, to engage an associated clearing cam for restoring the indicator whereby all the indicators are simultaneously restored; the center of gravity of said levers moving only about half the distance of the movement of the active end, whereby the mass-acceleration of said shaft and levers is slight during rapid operation, requiring relatively small power.

14. A non-traveling device for simultaneously restoring the indicators of a machine comprising a stationary frame, a carriage slidable thereon, and a plurality of indicators on the carriage, said device comprising means adapted to be mounted on the carriage for simultaneously. restoring all of said indicators, said means including motive members adapted to travel with the carriage when the latter travels; and non-traveling operating means adapted to be movably mounted on the frame and adapted to cooperate with one of said motive members at different positions of the carriage in its travel.

KARL LOCKE. RUDOLF BRUNHUBER.