US303881A

US303881A - Hinge for watch-cases

Info

Publication number: US303881A
Authority: US
Publication date: 1884-08-19
Anticipated expiration: 1901-08-19

Description

(No Model.) 2 Sheets-Sheet 1.

D. OHARA.

HINGE FOR WATGHOASES. v

Patented Aug. 19, 1884. o

AM!!! I B (No Model.) 2 sheetssheet 2;

13.0mm. HINGE FOR WATCH GASES.

No. 303,881. Patented Aug. 19, 1884.

N. rzrens. PhclwLimographur, washmglom of c.

UNITED STATES ATENT Fries.

DANIEL OHARA, OF WVALTHAM, MASSACHUSETTS.

SPECIFICATION forming part of Letters Patent No. 303,881, dated August 19, 1884.

Application filed March 7, 1884.

To aZZ whom, it may concern/.-

Be itknown that I, DANIEL OHARA, of the town of WValtham, Middlesex county, Massachusetts, have invented a new and useful Improvement in Hinges for WVatch-Oases, &c., of which the following is a specification.

My invention, while applicable to a variety of sheet-metal cases and vessels, is particularly designed as a mode of articulating the outer caps, backs, or bczels of watchcases to their bod y-centers, by which the cusioinary transverse joints of the hinge areco1npletely concealed or hidden from view, so as to combine the advantages of excluding dust, moisture, &c., and of securing greater elegance and neatness of external finish.

In the accompanying drawings, Figure 1 is a partly-sectioned inside view of a watclr case cap or back and corresponding bodycenter embodying my invention. Fig. 2 shows partly in section an unfinished hinge part of such cap or back, together with one of the two included bushes and the coupling pin or pintle inposition. Fig. 3 shows the two members of my hinge in transverse section. Fig. 4 shows my finished hinge partly in relief and partly in longitudinal section. Fig. 5 is an edge View of an open-face watclrcase embodying my invention. Figs. 6 and 7 represent by vertical transverse and horizontal axial sections such a hinge applied to a sheetmetal tea-pot.

A may represent the body-center watch-case, B an external cap or back, 0 a bezel. Projecting from and preferably constituting an integral part of the body-center in the represented tangential position, is a cylindrical hinge-knuckle, D. That part of the bodycenter at each end of said knuckle has semi-cylindrical channels E coaxial with said knuckle. Projecting in the represented taugential position from and preferably constituting an integral part of the back or bezel, is a cylindrical sheath, F, whoseinterior bore corresponds in diameter, and when in place in the watch-case is coaxial with the bodycenter knuckle D, and whose exterior corresponds with the channels E. The inner half of any 01" this cylindrical sh eath is, where it comes opposite the body-center knuckle D,cut away, as shown at 7. Driven tightly into each end of (No model.)

the sheath is a cylindrical tube or bushing, G, of identical diameter and bore with the bodyeenter knuckle D. The two members of the hinge are coupled together by means of a pivot rod or pintle, H, which is preferably of brass or steel. The bushings G may be of brass. The above hinge members being thus secured in position the sheath ends are, by a burnishing-tool or other means, neatly closed, as shown in Fig. 5, and on the right-hand side of Fig. 4, so as to couple the back, cap, or bezel to the body-center by concealed, secret, orinvisible knuckle and bushings, which, besides presenting a notably neat and elegant finish, is practically dust proof. A substantially similar hinge is available for uniting to their bodies the lids of silver tea-pots and other sheet-metal vessels. Such application of my hinge is shown in Figs. 6 and 7, and in such applications the lid-rim may be of sufficient diameter to completely include the sheath within its periphery, as shown in said figures.

The above-described preferred form of my invention may be multiplied in non-essential particulars. For example, the sheath projection from the cap, back, or bezel may inclose a single knuckle, which may be inter posed between two knuckle projections from the body-center.

I claim as new and of my invention 1. Asheath, F, in combination with 'ahinge knuckle, to conceal thetransverse joints, as set forth.

2. The sheath F, constituting an integral projection from the cap, back, or bezel of a watch-case and concealing the joints, substantially as set forth.

3. The hinge-conneetion of a watch-case cap, back, or bezel with the body-center, consisting of hinge-knuckle D, constituting an integral projection from the body-center, cylindrical sheath F constitutin an inte ral )roj ection from the cap, back, or bezel, bushings G, and the pintle H, substantially as set forth. In testimony of which invention I hereunlo set my hand.

DANIEL OHARA. Attest:

GEORGE E. VAN NORMAN, B. B. J oHNsoN.