Automatic clasp for wristwatch strap

Details Automatic clasp for wristwatch strap Automatic clasp for wristwatch strap

2008-03-04

2008-03-04

Bryant, David P. (Department: 3726)

Metal working

Method of mechanical manufacture

Watch or clock making

C024S2650WS

Reexamination Certificate

active

10520844

ABSTRACT:
A clasp and a production method thereof. The inventive clasp includes at least one main element (1) and at least one element (3) which pivots in relation to the main element. The clasp is characterised in that each of the aforementioned elements (1, 3) includes two longitudinal arms which are rolled up to form a hinge (7, 15) . Moreover, at least one of the ends of one of the elements (1, 3) includes a flexion spring (11) which can rest against the other element (3, 1) for the elastic support thereof and each arm (5, 13) of the main element (1) and the pivoting element (3) is provided with at least one longitudinal stiffening rib (20, 22).

REFERENCES:
patent: 2001216 (1935-05-01), Sand
patent: 3109229 (1963-11-01), Cataldi
patent: 3682603 (1972-08-01), Pompeo
patent: 4151014 (1979-04-01), Charschan et al.
patent: 4405386 (1983-09-01), Mravic et al.
patent: 5309616 (1994-05-01), Sobin
patent: 5689859 (1997-11-01), Cuche
patent: 5857243 (1999-01-01), Champion
patent: 471 556 (1969-04-01), None
patent: 621 286 (1935-11-01), None
patent: 0 867 132 (1998-09-01), None

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