US77579A - buckland - Google Patents

Description

UNITED STATES;

PATENT OFFICE.

II. BUCKLAND, or SPRINGFIELD, MASSACHUSETTS.-

- IMPROVEMENT IN wATcHoAsI-z 'SPRING-s.

. Speciscnon formingpart of 'Letters Patent No. 77,579, eased May s, v186e, A

- To all whom it may concern:

-of Massachusetts, have invented a new,l useful, and Improved Catch-Spring for Watches;

and I do hereby declare 'that the followingis a full and clear description thereof, reference being had to the accompanying drawings, and

' to the letters of reference marked thereon:

' In the drawings, Figure 1 is aplan View of the caseof awatch with a partial section,

and Fig.^2 a' sectional View of the same part A 'crosswise -This invention consists of a new construc-A tion of a spring for. the purposes above mentioned, and is intended to `entirely obviate certain diicultes attending the old forma-y tion ofspring. t

In the ordi-nary method of constructing-the springs for the purpose of throwing open the pase and latching it when shut down two distinct springs have been used. 'lhese are short piecesl of spring metal inserted1 in the case underneath the edge, one end of each being fastened by means of a small screw put-through the rim of the case and through the-spring. This requires a hole to be made through each spring-piece and corresponding holes in the case. Nowwhen by any'accident either of these springs are broken, in'order to put a new one in its place it must be manufactured of the proper length vand the hole for the screw drilled at exactly the proper spot to correspond with the holes in the case. Thisis a troublesome operation and requires a considerableexpenditure of time for its performance. In my invention I totally dispense with the fastening-screws" and make both'springs in on'e, as I will nowdescribe.

In the drawings it is seen that the spring Areaches past a straight line, bisecting the' 'catch dis v circumference of the groove a in the case at Be it known 'that I, E. H. BUCKLAND, of l Sprngiield, Hampden countyommonwealth both ends, thus occupying over. half of the circumference, At`one end,`next to the-hinge of the watch, is the tongue b, which throws up the-back platedwhen itis released fromthe catch.` In this arrangement of spring I. prefer to form the catch itself upon the stud and let the spring press against it. Thus the formed upon the lstudE,` and is pressed outward bythe springA against it at this-point.` The advantages of this last arrangement are that 'the stud, confined by the 'spring on one side and prevented by the head formed upon fit in the catch from slipping` through, does not -require any pin to be put through it in order to hold it in place. The catch may, however, be: made direct-1y upon the spring at a point opposite the hinge, if so desired. Y

In putting in these springs all that is required to fasten them in place is to compress them sufficiently to 'allow them to get inside the groove, and upon releasing them theyspring .against the side of the watch-case inside, and being more. than .half the circumference in length they do not require any fastening to hold themin place.

Now having described myn-invention, what I claim as new, and desire to secure by Let; Y

ters Patent, is'-` 1.- The spring A, formed of one piece and reaching over half the circumference of the c ase and forming both catch and throw upat each end, respectivelygsubstantially as and for the purpose shown.

2. The stud E, with the catch d' formedu'pbn' it', substantially as and for the'purpose shown.

E. H. BUCKLAND.

Witnesses WM. H. BRADBURY,

E. H. HYDE.

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