US128893A

US128893A - Improvement in watch-case springs

Info

Publication number: US128893A
Authority: US
Publication date: 1872-07-09
Anticipated expiration: 1889-07-09

Description

5. LAURENT No.128893, Paeneuiy 9,1872.

PATENT OFFICE.

JACQUES LAURENT, OF NEW YORK, N. Y.

IMPROVEMENT IN WATCH-CASE SPRINGSn Specification forming pari of Letters Patent No. 128,893, dated July 9, 1872.

Specification describing an Improvement in the Attachment oi' Springs to VatchGases, the invention of JACQUES LAURENT, of the city, county, and State of New York.

This invention consists in the novel means of holding each or any of the springs which are arranged within the rim or band of the case of a watch7 for controlling the action of the face-cap or back lid of the case, whereby the fulcrums of said springs are inseparably connected with the case, and screws for the purpose are dispensed with, thus reducinglabor, liability to derangement and breakage; also, whereby the springs may be more readily fitted to and removed from their places, when required.

ln the accompanying drawing, which forms part of this specification, Figure 1 represents a partly-sectional face view of the band or rim of a watch-case with a hinge and catchspring fitted thereto in accordance with my improve ment. Fig. 2 is a transverse section of the same at the line w Fig. 3 is a transverse section thereof at the line y y,- and Fig. 4, an interior face view of one oi' the springs detached.

Similar letters of reference indicate corresponding parts throughout the several tignres of the drawing.

A is the rim or band of a watch-case, which may be of ordinary construction, and which has the hin ge-spring B and catch-spring (l let into or embedded within it, as usual. Ordinarily these springs are retained in their places within the band by means of a screw-that is, one to each springintroduced through the band and into the spring at a proper point to form a fulcrum for the latter. These screws not only entail labor in fitting them to their places, but they are liable to work loose, and not unfrequently break by the stress of the spring upon them, and at other times they stick or corrode so that it is ditcult to extract them when it is desired to remove the spring for its replacement by another. They are also unsightly, being introduced from the exterior of the rim or band A. I construct the case with a small tooth or projection, c, for each spring to take its fulcrum or bearing upon, said teeth being integral portions of the rim or band, and being arranged on the one side of the recess or recesses e, in which the springs are embedded 5 andI furthermore construct the springs on their one side or edge with anotch, s, so that the springs may be sprung to their places, having the teeth c within the notches S. Said teeth c thus form permanent fulcrnms for the springs, and serve to retain them in their places, at the same time admitting of the ready removal ofthe springs, when required, by simply introducing a barbed tool or wire from the side of theba-ndto catch hold of the springs at their backs and spring or jerk them out of the band.

What is here claimed, and desired to be secured by Letters Patent, is

The rim or band A of the watch-case formed with a tooth or teeth, c, in its recess e, in combination with the notch s in the springs b d, or either of them, substantially as specified.

JACQUES LAURENT.

Witnesses:

FEED. HATNEs, R. E. RABEAU.