US388648A

US388648A - Territory

Info

Publication number: US388648A
Authority: US
Publication date: 1888-08-28
Anticipated expiration: 1905-08-28

Description

(No Model.)

S. A. DURGIN.

STEM WINDING WATCH.

No. 388,648. Patented Aug. 28, 1888.

) OOLLLOL-M 3 may,

N PETERS M MI-whet. Wishlflglou u c SILAS A. DURGIN, OF SHELDON, DAKOTA TERRITORY.

STEM-WINDING WATCH.

SPECIFICATION forming part of Letters Patent No. 388,648, dated August 28, 1888.

Application filed May 12, 1898.

To all whom it may concern:

Be it known that I, SrLAs A. DURGIN, a citizen of the United States, residing at Sheldon, in the county of Ransom and Territory of llakota, have invented certain new and useful Improvements in \Vatehes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in watches, and more particularly to doublecase or hunting-case watches of the stemwinding class. In all such watches, so far as Iam aware, it has hitherto been considered mpracticable to throw the setting mechanism into gear without the employment of a special and independent setting-lever which projects beyond the rim near the pendant. The winding is done with the Winding-bar in the pendant, and means are provided for releasing the case-spring; but to perform the three movements of winding, setting, and case-opening from a single stem without special mechanism connected thereto has not to my knowledge been attempted.

My invention consists, first, in performing these three movements from a single stem without extra connections, and also in a pcculiar construction of the winding-bar by which these results are accomplished.

In the drawings, Figure 1 represents so much of the winding and setting mechanism of a hunting-case watch as is necessary to fully show my improvements. Fig. 2 is a view of my improved winding-bar.

A represents a watch-case center, and R the pendant, both of ordinary construction. (1 is the case-snap, forming the extremity of the spring I), and having a hole, (2, to admit the w1nding-bar. E represents the yoke; F. the erown-whcel; G and G, the winding-wheels, and H II the settingwheels. l. is the winding-pinion gearing into the crown-wheel F. These parts themselves are well known in use and form no part of my invention.

J is the winding-bar adapted to fit within the pendant and having its end threaded, as usual, to receive the winding-crown. It is squared at its other end to fit the winding- Serial No. 273.674. (No model.)

pinion I, in which it slides, and this squared end passes through the hole 0 in the snapspring (J. Upon the winding-bar and extending to the winding-square is a short threaded portion, 7', upon which is fitted a correspondingly-threaded shoulder, k. This shoulder bears upon the snapspring, as shown, and forces the latter inward when the winding-bar is depressed to open the case. The shoulder is thus adjustable upon the winding-bar to fit different case-centers, and when properly adjusted is secured rigidly in any suitable way. It will be noticed, also, that the windingsquare is elongated to nearly twice its ordinary length, as shown in Fig. 2, where 00 represents a bar of the ordinary construction.

The ordinary movements of the mechanism for winding and setting are well understood by those skilled in the art. In all huntingcase watches, however, it is customary to use an extra scttinglever, which throws the winding-wheel in the yoke out of gear with the main, winding-wheel, and throws the settingtram into gear, so that the windingbar accomplishes only the two operations of opening the case and winding the watch. In my present device, however, the three movements are all performed by the winding-bar. Normally the winding-wheels are in gear and the watch is wound in the usual manner. Pressure inward upon the pendantcrown releases the snap, and the case-spring throws the case open. Now, the increased length of the winding-square enables me to draw the windingbar back far enough to permit the yoke-spring to throw the winding-wheels out of gear and the setting-tram into gear without disconnecting the square from the winding-pinion, and the hands may be set by turning the windingcrown in either direction. Thus all the movements are performed by a single stem and without the intervention of levers, springs, or any other connections to the setting mechanism, such as are ordinarily employed.

\Vhat I claim is- 1. In a watch, a winding-bar having an adjustable collar for releasing the snap-spring, substantially as described.

2. A winding-barter watches having a partially-threaded stem, in combination with a threaded collar upon such stem adapted to ing spring are operated directly by said bar [0 bear upon the snap-spring, substantially as Without setting-levers, substantially as doand for the purpose set forth. scribed.

3. In combination with ahunting-ease watch In testimony whereof I have affixed my sig having stem Winding and setting mechanism, nature in presence of two Witnesses. a windingbar having a collar for operating to SILAS A. DURGIN. release the casesnap, and connected to the Vitnesses: yoke and Winding-pinion, whereby the wind- R0131. J. MITCHELL, ing and setting mechanism and the casereleas- I ED. PIERCE.