US500325A

US500325A - Watchcase-spring

Info

Publication number: US500325A
Authority: US
Publication date: 1893-06-27
Anticipated expiration: 1910-06-27

Description

(No Model.)

N. J. FELIX. WATGHCASB SPRING.

N. 500,325. Patented June 27, 1893.

UNITED STATES PATENT OFFICE.

NUMA J. FELIX, OF BROOKLYN, NEIV YORK.

WATCHCASE-SPRING.

,SPECIFICATION forming part of Letters Eatent No. 500,325, dated J' une 27, 1893.

Application filed December '7, 1891. Serial No. 414,315. (No model.)

To @ZZ whom t may concern,.-

Be itknown that I, NUMA J. FELIX, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Vatchcase-Springs, of which the following is a specification.

My invention relates to an improvement in Watch-case springs, the object of the same being to provide an article of this character which shall be provided with a backing and so constructed that the blade or spring proper may be secured to said backing and to the case center without the necessity of drilling` holes in said blade, which as is well known, tends to weaken and materially shorten the life of the spring.

With this and other ends in view my invention consists in certain novel features of construction as will be hereinafter described and pointed out in the claim.

In the accompanying drawings, Figure 1 is a plan view of my improved spring. Fig. 2 is a side view of the same. Fig. 3 is a sectional view thereof, taken on the line 3-3 of Fig. 1. Fig. 4 is a side view of a modification. Fig. 5 is a sectional view thereof taken on the line 5-5 of Fig. 4t. Fig. 6 is a side view of another modification. Fig. 7 isasectional view thereof taken on the line 7-7 of Fig. 6. Fig. 8 is a side view of the spring prior to the attachment of the backing.

In the drawings and specification I have shown and described my invention as applied to the lift spring of a watch-case, but it will be obvious to those skilled in the art, that it is equally well adapted for use in connection with the catch spring, and hence I do not limit my claim to either application.

A represents a blade or spring proper, constructcd of thin sheet metal, properly tempered, and provided on one end with the curved lip or projection a, adapted to bear on and raise the lid of a watch case when released by the catch, said spring being curved or bent to conform to the shape of a watchcase center.

in Fig. 1, the upper surface thereof can be slightly filed off, giving an approximately straight edge to the spring, and fitting iiush with the upper surface of the backing B. Small pin or screwholes are then bored through the lugs b and through the backing for the reception of the pins or screws c, which may also pass through the case center and thus hold the several parts in their proper positions, and this without any drilling of the spring proper A, or the backing may be drilled as at c2 for the retaining pin. If desired, the outer side of the backingB maybe also slightly cut out, and the lugs b bent downwardly to fit therein as shown in Fig. 4. In this case the two pins may be omitted and only one used, the backing being drilled at any desired point to receive it, as for instance at c. Again, if desired, the cut-out portions of the backing may be lengthened as shown in Figs. 6 and 7, and the backing allowed to slide on the spring a short distance in either direction, which serves to render the spring a desirable one for jobbing purposes, as the hole d therein for the reception of the retaining pin can be made to register with the pin hole formed in the case center by slightly shifting the backingB on the blade A.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

A Watch case spring, comprising the spring proper A, formed of properly tempered thin sheet metal and provided at one end with the curved lip or projection a, said spring being curved or bent to conform to the shape of the watch case center, the lug or lugs b, formed on the upper edge of the plate A, said lugs being adapted to be bent over as shown and iit into the recesses formed in the backing B, the metallic backing B, curved to conform to the shape of the spring and nicely fit thereon, the pin or screw hole formed in the lugs h and in the backing and adapted to receive the pin or screw c which hold the several parts in their proper position, substantially as described.

Signed at New York, in the county of New York and State of New York, this 5th day of December, A. D. 1891.

NUMA J. FELIX.

Witnesses: Y

GEORGE Coon, B. l?. STRATTON.

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