US269974A

US269974A - Stem-winding watch

Info

Publication number: US269974A
Authority: US
Publication date: 1883-01-02
Anticipated expiration: 1900-01-02

Description

(No M odl.)

N. R. VARNEY. STEM WIND'ING WATCH.

Patented Jan. 2, 1883.

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UNITEDl STATES PATENT OFFICE.

NICHOLAS R. VARNEY, OF \VAL'IHAI\I, MASSACHUSETTS.

STEM-WINDING WATCH.

SPECIFICATION forming part of Letters Patent`No, 269,974, dated,A January 2, 1863.

Application tiled October 25, 1882.

.To all whom 'it may concern:

Be it known that I, NICHOLAS R. VARNEY, of /Valtham, in the county of Middlesex, of the State of Massachusetts, have invented a new vand useful Improvement in Stem-finding Watches; and I do hereby declare the same to be described in the following specification and represented in the accompanyingdrawings, of which- Figure l is a top view ot' a watch with the dial removed. Fig. 2 is a top view, Figz a transverse section, and Fig. 4 a longitudinal section, of the stem and the mechanism thereof which .I have invented to aid in effecting either the winding ofthe watch 7or the setting of its minutehand, the aforesaid figures being on an enlarged scale.

' hereinafter explained.

Heretofore in the manufacture of watches the devices for moving the yoke in order to throw into gear that part of the stem-winding mechanism for effecting .the setting of the minute-hand have been mostly,itl not entirely,

in or applied to the pillar-plate and case of the time-piece, and not to the stem. Under such circumstances it has been found very diftcult, if not impossible, with such devices and their mode of application to the case, to prevent moisture or dust from working into the case throughthe aperture in which the device to be moved by the linger ot' a personextended.

In` carrying out my improvement I have within the stem and to extend from the yoke the'mechanism for actuating,r the yoke so as to throw into gear the mechanism for setting the minute-hand. To this end I project from the yoke toward the stem an arm, and I have within the stem a slide carrying a cam, which, when the slideis moved one way, or in, so acts against the arm as to press it aside in a manner to turn theyoke to put in gear the hand-setting mechanlsm.

In the drawings, A denotes the case, B the pillar-plate, andG the stem, of astem-winding watch.

D is the yoke, which, as is well known, is a lever properly fulcrumed at its middle part, and having to each of its arms one of two spur-gears, a b, which engage with an intermediate gear, c, underneath the yoke. This gear c is usually coupled to a bevel-gear, d, which engages with a bevel-pinion, c, on the Figs. 5, 6, 7, and 8 are (No model.)

\vindingarborf. A key.j", in the stem, and projecting from the winding crown or head g, tits upon the arborf. 0n revolving the said head r/ the gears of' the yoke are put in operation.

Fastened tothe pillar-plate is the spring l1 for moving the yoke to elfect engagement of the gearing for winding the watch or its mainsprin'g. The two gears to be engaged alternately with ,the gear of the arms of the yoke are shown at t' and 7.7, one of them being applied to the arbor of the mainspring and the other to ajournal projecting'froni the pillarplate. This latter gear engages with a pinion, 1,011 the arbor of the minute hand m.

My invention is to move the yoke so as to put the gear b into engagement with the gear k ot' the minute-liand-setting mechanism, and also, as occcasiou may require, to enable the spring 7L to move the yoke so as to put the gear a in engagement with the gear 17 ot' the mainspring-arbor.

Within the upper part of the stem C is a slide, n, which is adapted to move lengthwise in the stem in a dovetailed groove, o, made therein, this slide having on its outer surface a small projectiomp, for the finger-nail of a person to bear against in order to move the slide backward or forward within the groove. Leading down from the groove o there is in the stem a slot, q, which opens into the bore r ot' thestem. Within the said bore, and connected with the slide by a screw,s, is the cam t, shaped as shown in top view in Fig. 5 and in edge view in Fig. 6. The inner end of the cam is beveled, as shown at n, and bears either against the end of an arm, o, extending from theyoke, at or near its middle, or against a suitable pin or stud projecting from the arm. Ou the cam being moved in by the slide the beveled part u of said cam will move the arm so as to turn the yoke on its fulcrum to cause the gear b to be thrown into engagement with the gear 7;. The crown or head g screws,as usual, upon the the stem, and across the slide n are short sections w ot' screw-threads, corresponding in pitchto the screw-threads ofthe head and stem.

Fig? is a top view,and Fig. 8 an edge view, of the slide n, with its short sections w of screw-threads.` On screwing the crown down upon the stem such crown will screw upon the sections w, and thereby prevent the slide from IOO being` accidentally movedlengthwise. Before l slide and anni, all being substantially as set the slide can be moved the crown has to be forth. suficiently unscrewed on the stem. i 3. The slide provided with one or more Sec- I claimtions ot'soreW-threads, as described, to engage 5 l. 1n combination with the arm projecting with the screw-threads oi' the crown, I.hand for i5 from the yoke,the slide l(ind the cam, arranged the purpose set forth.

in the stem, all being substantially als set forth. NICHOLAS R. VARNEY.

2. The Watch-case stem provided with the Witnesses: slide, and the cam connected therewith, Iand 1t. H. EDDY7 11o slotted to receive the connecting-screw ot' the E. B. PRATT.