The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 06, 1979
Filed:
Apr. 26, 1977
Charles Guyot, Tavannes, CH;
Jacques Muller, Reconvilier, CH;
Ebauches Tavannes S.A., Berne, CH;
Abstract
A calendar watch movement with a double cam arrangement that drives the date-indicating wheel one step every 24 hours and locks the wheel between driving periods. The first cam has a hook that engages the toothed inner portion of the date-indicating wheel and advances the wheel by one tooth each 24 hours. The cam also has an arcuate peripheral portion that fits in between two successive teeth and locks the wheel when it is not being advanced. The first cam is integral with a co-axial star wheel which is driven by a second cam having both a hook and an adjacent shoulder that advance the star extensions. The second cam is driven by the hour wheel.