US2640311A

US2640311A - Winding and setting mechanism for watch and clock movements and the like

Info

Publication number: US2640311A
Application number: US83224A
Authority: US
Inventors: Stamm Heinrich
Original assignee: Ebauchesfabrik ETA AG
Current assignee: Ebauchesfabrik ETA AG
Priority date: 1948-03-30
Filing date: 1949-03-24
Publication date: 1953-06-02
Anticipated expiration: 1970-06-02
Also published as: GB671828A; CH273137A; DE803705C; FR983810A

Description

June 2, 1953 sTAMM 2,640,311

WINDING AND SETTING MECHANISM FOR WATCH AND CLOCK MOVEMENTS AND THE LIKE Filed March 24, 1949 I il at wam k Patented June 2, 1953 WINDING AND SETTING MECHANISM FOR WATCH AND CLOCK MOVEMENTS THE LIKE AND Heinrich Stamm, Grenchen, Switzerland, assignor to ETA AG., Ebauches-Fabrik, Grenchen, Switzerland, a joint-stock company of Switzerland Application March 24, 1949, Serial No. 83,224 In Switzerland March 30, 1948 4 Claims.

ting member and the intermediate wheels was very troublesome in that the latter were liable to drop out, and in that there was no means by which to attach the wheels to the setting member during assembling.

It has proved advantageous and it is an object of my invention to leave the usual way, and to mount the intermediate wheels of the rocking setting member on the side turned towards the dial, where they are held by a cover plate constituted by the base of the setting lever spring.

Other objects and features will be apparent as the following description proceeds, reference being had to the accompanying drawing showing, by way of example, one embodiment of the invention, and wherein Fig. 1 is a section through the axis of the rocking-bar, and

Fig. 2 is a top view of the parts of the winding and setting mechanism, which are necessary for the comprehension of the invention.

The rocking-bar 3 is pivotally mounted on a tubular portion 2 of the plate I, and possesses two

pins

4 and 5 projecting from the face of the rocking-bar 3 which is turned away from the plate I. The outer intermediate wheels 6 and 1 are loosely mounted on these

pins

4 and 5, and mesh with a center intermediate wheel 8 loosely mounted on a tubular portion 9 of the rocking-bar 3. Therefore, seen from the dial (not shown), the rocking-bar 3 lies below the intermediate wheels 6 and I. These wheels are prevented from dropping out by the base Ill of the setting lever spring. A spring ar-m II integral with said base I0 is provided with the two

cutouts

24 and 25 which cooperate with the pin 23 projecting from one end of an arm of the setting lever I2. The two-armed setting lever is pivotally mounted on the plate I and the end of the arm carrying the pin 23 is shaped in the form of a nose 20 which may cooperate with a notch 2| provided in the edge of the rockingbar 3. The other arm of the setting lever carries a pin I9 projecting therefrom and extend- 2 ing into an annular slot 22 of the stem I8 which may be axially shifted in the plate I. The stem drives a winding pinion 26 which is constantly in gear with the center intermediate wheel 8.

The base In of the setting lever spring is fixed to the plate I by means of a screw I3 screwed into a central bore of the tubular portion 2 around which the rocking-bar 3 rotates. The setting lever spring is kept against rotation around the screw I3 by a projecting arm maintained in a recess of the plate both the arm and the recess being not shown in the drawing. An aperture II is provided in the base ID of the setting lever spring and the pin 4 projecting from the rocking-bar 3 arises through this aperture I! to cooperate therewith.

The rocking-bar spring I5 is situated in a recess I4 of the plate I, and cooperates with a pin I6 of the rocking-bar 3, room being left in the plate I to allow movement of the pin I6.

As may be seen, the axial play of the intermediate wheels mounted on the rocking bar 3 is limited by a stationary cover plate constituted by the base ID.

The mechanism described above is destined to work in two positions, namely the winding position and the setting position (shown in Fig. 2).

These positions will be changed one into the other by shifting manually the stem I6 into or out of the plate I.

The setting position of this mechanism shown in Fig. 2 may consequently be changed into the winding position by pushing the stem I8 into the plate I. Because of the cooperation of the pin I9 and the annular slot 22, the setting lever pivots counterclockwise until its pin 23 comes into the cutout 25 of the spring arm I I. -The nose 20 releases then the rocking-bar 3 and the rocking-bar spring I5 bearing against the pin I6 pushes said pin and rotates the rocking-bar 3 counterclockwise, until its pin 4 leans against the edge of the aperture I1.

In this position, the intermediate wheel I is free and the intermediate wheel I3 is in mesh with a winding wheel which is not shown.

The pin 4 and the aperture II are so disposed as to prevent the intermediate wheel 6 and said winding wheel from coming to near what could cause a clamping of the mechanism.

The mechanism is returned from that winding position to the setting position shown in Fig 2 by pulling the stem l8 out of the plate I.

The annular slot 22 drives the pin I9 of the setting lever I2 which consequently rotates clockwise until its pin 23 comes into the cutout 24 of the spring arm H of the setting lever spring.

During the movement of the setting lever, its nose 2!] bears against the rocking-bar and rotates it clockwise against the power of the rocking-bar sprin until the nose 28 of the setting lever l2 catches the notch 2| of the rockingbar 3 and clamps with it so as to prevent a further displacement of the rocking bar.

In this position the intermediate wheel 5 is free and the intermediate wheel 1 is in mesh with a setting wheel which is not shown.

The nose 2G and the notch 2! are so disposed that the intermediate wheel I and said setting wheel stay at the appropriate distance for a normal gearing. Mechanically speaking, this new arrangement is superior to the one used in the prior art. Furthermore, the novel arrangement facilitates the assembling of the rockingbar with its intermediate wheels. The rockingbar and the intermediate wheels may be assembled picce by piece. Moreover, mounting the rocking-bar spring below the rocking-bar is possible, which results in very favorable conditions as to utilization of the space available.

While I have described and illustrated one embodiment of my invention, 1 do not wish to unnecessarily limit the scope of my invention, but reserve the right to make such modifications and rearrangements of the several parts as may come within the purview of the accompanying claims.

What I claim is:

1. In a watch or clock movement, a plate, and a winding and. setting mechanism comprising a rocking-bar pivotally mounted on said plate and having a notch and a projection, said projection extending on the side opposite said plate, a twoarmed setting lever pivotally mounted on said plate and having a nose and two projections, one at each end of said arms, said setting lever moving said rocking-bar, an axially movable stem having an annular slot for moving said setting lever, three intermediate wheels rotatably mounted on said rocking-bar on the side thereof opposite said plate, said three wheels lying in one plane, and a setting lever spring having a spring arm with two cutouts and a base having an aperture and being detachably secured to said plate and positioned on the side of said wheels opposite the rocking-bar and serving as a cover to retain said intermediate wheels on the rocking-bar against axial movement, one of said projections of said setting lever cooperating with said annular slot 01". said stem and the other of said projections of said setting lever cooperating with said two cutouts of said spring arm, said nose of said setting lever cooperating with said notch of said rocking-bar and said projection of the rockingbar extending on the side opposite said plate arising through said aperture of said base and cooperating with said aperture, for accurately determining both the setting and the winding positions of said rocking-bar.

2. In a watch or clock movement, a plate, and a winding and setting mechanism comprising a rocking-bar pivotally mounted on said plate and having a notch and a projection, said projection extending on the side opposite said plate, a. twoarmed setting lever pivotally mounted on said plate and having a nose and two projections, one at each end of said. arms, said setting lever moving said rocking-bar, an axially movable stem having an annular slot for moving said setting lever, three intermediate wheels rotatably mounted on said rocking-bar on the side thereof opposite said plate, said three wheels lying in one plane, said projection of the rocking-bar extending on the side opposite said plate being the axle of an outer of said intermediate wheels, and a setting lever spring having a spring arm with two cutouts and a base having an aperture and being detachably secured to said plate and positioned on the side of said wheels opposite the rocking-bar and serving as a cover to retain said intermediate wheels on the rocking-bar against axial movement, one of said projections of said setting lever cooperating with said annular slot of said stem and the other of said projections of said setting lever cooperating with said two cutouts of said spring arm, said nose of said setting lever cooperating with said notch of said rockingbar and said projection of the rocking-bar extending on the side opposite said plate arising through said aperture of said base and cooperating with said aperture, for accurately determining both the setting and the winding positions of said rocking-bar.

3. In a watch or clock movement, a plate having a tubular portion, and a winding and setting mechanism comprising a rocking-bar pivotally mounted on said tubular portion of said plate and having a notch and a projection, said projection extending on the side opposite said plate, a, twoarmed setting lever pivotally mounted on said plate and having a nose and two projections, one at each end of said arms, said setting lever moving said rocking-bar, an axially movable stem having an annular slot for moving said setting lever, three intermediate wheels rotatably mounted on said rocking-bar on the side thereof opposite said plate, said three wheels lying in one plane, said projection of the rocking-bar extending on the side opposite said plate being the axle of an outer or said intermediate wheels. and a setting lever spring having a spring am with two cutouts and a base having an aperture and being detachably secured to said plate by a. screw screwed on said tubular portion of said plate, and positioned on the side of said wheels opposite the rocking-bar and serving as a cover to retain said intermediate wheels on the rockingbar against axial movement, one of said projections of said setting lever cooperating with said annular slot of said stem and the other of said projections of said setting lever cooperating with said two cutouts of said spring arm, said nose or said setting lever cooperatin with said notch of said rocking-bar and said projection of the rocking-bar extending on the side opposite said plat arising through said aperture of said base and cooperating with said aperture, for accurate- 1y determining both the setting and the winding positions of said rocking-bar.

4. In a watch or clock movement, a plate having a recess and a tubular portion, and a winding and setting mechanism comprising a rocking-bar pivotally mounted on said tubular portion of said plate and having a notch, a projection extending on the side opposite said plate and a projection extending towards said plate, a rocking-bar spring positioned between said rocking-bar and said plate in said recess of said plate and bearing against said projection of said rocking-bar, extending towards said plate, a two-armed setting lever pivotally mounted on said plate and having a nose and two projections, one at each end of said arms, said setting lever moving said rocking-bar, an axially movable stem having 3118.11- nular slot for moving said setting lever, three intermediate wheels rotatably mounted on said rocking-bar on the side thereof opposite said plate, said three wheels lying in one plane, said projection of the rocking-bar extending on the side opposite said plate being the axle of an outer of said intermediate wheels, and a setting lever spring having a spring arm with two cutouts and a 'base having an aperture and being detachably secured to said plate by a screw screwed on said tubular portion of said plate, and positioned on the side of said wheels opposite the rocking-bar and serving as a cover to retain said intermediate wheels on the rocking-bar against axial movement, one of said projections of said setting lever cooperating with said annular slot of said stem and the other of said projections of said setting lever cooperating with said two cutouts of said spring arm, said nose of said setting lever cooperating with said notch of said rocking-bar and References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 101,881 Jacot Apr. 12, 1870 348,009 Heath et a1 Aug. 24, 1886 411,147 Gunz Sept. 17, 1889 799,087 Porter Sept. 12, 1905 2,434,390 Burgbacher Apr. 24, 1943