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:
Jul. 01, 2003
Filed:
Nov. 16, 2001
Jean-Philippe Rebeaud, Cressier, CH;
Denis Burdet, Neuchâtel, CH;
ETA SA Fabriques d'Ebauches, Grenchen, CH;
Abstract
The transmission device disclosed is inserted between a rotating oscillating weight and an electric micro-generator in order to drive the generator rotor from the oscillating weight by multiplying the rotational speed. Its intermediate wheel and pinion includes a barrel ( ) whose central shaft ( ) is coupled to the drum ( ) of the barrel by a spiral spring ( ). The inner end of the spring has a bent portion ( ) which engages via resilience in any one of a number of hollows ( ) in the shaft and can be released by sliding over a slanting side ( ) when the shaft exerts too great a torque in the given rotational direction. This arrangement prevents damage resulting from shocks, in particular in the case of a watch, without using a friction system.