US289728A

US289728A - Gedbozst thommeln

Info

Publication number: US289728A
Authority: US
Publication date: 1883-12-04
Anticipated expiration: 1900-12-04

Description

(Model.)

G. THOMMEN.

WATCH.

No. 289,728. i Patented Dee. 4, 1888.

UNITED STATES Parietti WATCH.

SPECIFICATION forming part of Letters Patent No. 289,728, dated December 4, 1883.

Application filed May 3l, 1883. (Model.) Patented in Germany February 15` 1579, Xo. 6,878; in France February 2l, 1ST?,

' No. 129,282, and in Belgium March 15, 1879, No. 47,522.

To all whom it izm/ concern.-

Be it known that 1, GEDEON TI-roirnnn, a citizen of Switzerland, and a resident ot`.\Valdenburg, near Basel, Switzerland, have iuvented certain Improvements in XVatches, (for which I have obtained German Letters Patent No. 6,878, February 15, 1879; French Letters Patent No. 129,282, February 2i, 1879, and Belgian Letters Patent No. 47,522, March 15, 187 9,) of which the following is a specification.

My invention relates to certain improvements in the construction of watches, with more special reference to the manner of securing the cannon-pinion on the axis of the pinion ot' the center-wheel, and to the devices for throwing the hand setting and winding mechanism into and out of gear, as more fully described hereinafter.

In the accompanying drawings, Figure 1 is a view, drawn to an enlarged scale, of sutiicient of a watch to illustrate my invention. Fig. 2 is a similar view, showing the rocking lever carrying the gears and separate from its operating devices. Fig. 8 is a view showing the locking-lever. Fig. i represents in different views the cannon-pinion and the devices for mounting it on the axis ot' the center-wheel. Figs. 5, 6, and 7 are views illustrating the construction Ot' the spring-pawl for the ratchetwheel of the mainspring.

The operative parts ofthe watch are mounted, as usual, on the front and back plates, m and m', 7L being the rocking lever, carrying at opposite ends gear-wheels j' and g, gearing into the same intermediate wheel, h', to which motion is imparted by the usual winding-stem, s, either to wind up the spring or to set the hands, according to the position to which the lever 7L has been adjusted. A spring, p, acts on one end of this lever, to keep it normally in the position shown in iull lines, Fig. 1, with the pinion g in gear with the ratchet-wheel i on the barrel of the mainspring, so that the turning of the winding-stem will wind up the spring. When the lever h is moved to the position indicated by dotted lines in Fig. 1, the wheel g will be thrown out oi" gear with the wheel z, while the pinion f, at the opposite end ofthe lever, will be thrown into gear with the wheel k, for transmitting motion to the minute and hour hand pinions to set the hands.

On referring to Fig. 4, illustrating the method of mounting the cannon-pinion c, it will be seen that this pinion is provided with an internal undercut or dovetailed annular recess, fr, into which is inserted a spiral spring, c, the latter retaining its position by its elasticity. On the pole d of the center-wheel c is eut au annular recess, into which the inner face of the spring c slips, to retain the cannon-pinion ar when the latter has been placed in position on the tapered pole (l.

The rocking lever 7i, Fig. 1, is moved into the hand-setting position by means ot' the bent lever n, which is pivoted to the plate m at a', and has its outer end projecting outside the case, so that it may be pulled outward to the position indicated by dotted lines in Fig. 1. This lever a is provided with a nose, if, acting on an inclined or cam face on the edge of the lever h, so that when the said lever n is pulled outward, as shown by dotted lines, that end ol" the rocking lever 7L will be pressed downward against the action of the spring p, to throw the pinion j' into gear with the wheel 1.'. llo maintain the lever n in itsinneror normal position, a spring, o, acts on a nose, n, on the lever, the said nose bearing such a relation to the pivoting center of the lever that when the latter is pulled outward to the position shown in Fig. 3 the pressure of the spring will be toward the pivot, or on what may be termed a dead-eenter,77 so that there will be then no tendency to return the lever to its normal position 5 but as soon as the lever n is pressed inward a little, the spring o will begin to act. One end ofthe rocking lever h is iorked, and between these forks is a pin, I, secured to the plate m in such a position that it will limit the extent of motion ofthe said lever to insure the gearing of the pinions j' and with their corresponding wheels, only to the proper extent The spring-pawl q i'or the barrel ot" the mainspring is constructed as shown in Figs. 5, (i, and 7. It is provided with apivot-pin, q, passing through the plate lm, and also has secured to it one end ot' a steel spring-wire, q', which passes freely through an opening or slot in the front plate, and has its opposite end secured to the back plate, being thus at right angles to the plane of movement of the pawl. Vhen the end ot' the pawl lies between the IOC) Q germes having a Cani-edge, and the spring 0, with the lever u, acting on the said rocking lever, and having a nose, n, to be acted von by the said spring in the relation substantially as described, whereby the nose will be on a deadeenter when the lever n is in its open position. In testimony whereof I have signed my naine to this specification in the presence of two subscribing witnesses.

GEDEON THOMMEN. Vitnesses:

HENRY ForACKRR, HARRY L. AsHRNRRL'rRR.