Battery holder for electronic wrist watch
AssigneeETA A.G. Ebauches-Fabrik
InventorFriedrich Perrot
Life of this patent
Estimating the term…
Abstract
A battery is placed in a recess in the plate of an electronic wrist watch movement. The battery cover presses against a spring contact fixed to a plate bearing a printed circuit. An insulating sheet insulates the battery from an inner flange of the movement plate. Disposed on the bottom of the battery casing is a pressure bracket having arms which resiliently grip the sidewall of the casing. Resilient radial tongues of the bracket are bent so as to be in contact with the back of the watch case which presses against the assembly at the time of casing-up so as to hold the battery in place. The connection to ground is established by a contact part and a screw, as well as by the contact between the battery casing and the movement plate and via the back of the watch case.
Claims8
An electronic watch comprising:
- a case body;
- a back removably secured to said case body;
- a watch movement frame part secured within said case body;
- a lodging in said frame part for receiving a battery, the bottom of said lodging being defined by a holding portion integral with said frame part;
- a flat cylindrical battery engaging said lodging and having a sidewall;
- said battery haing a first pole connected to said sidewall;
- a cover connected to a second pole of said battery;
- a flat wall opposed to said cover;
- first and second spring contacts secured with respect to said frame part, said first contact engaging said cover to be in electrical contact with said second pole, said second contact engaging said sidewall to be in electrical contact with said first pole;
- and
- a separate bracket means fitted onto said battery and having a resilient protruding tongue which bears against said back, said bracket means pressing said battery against said holding position, whereby said battery is axially held within said watch through said bracket means, which is independent of said spring contacts.
Dependencies are inferred from the claim text.