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:
Apr. 16, 2002
Filed:
Sep. 29, 1998
Applicant:
Inventors:
Kunio Koike, Matsumoto, JP;
Eisaku Shimizu, Okaya, JP;
Osamu Takahashi, Matsumoto, JP;
Osamu Shinkawa, Suwa, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G04B 1/00 ; G04C 3/00 ; H02D 9/04 ;
U.S. Cl.
CPC ...
G04B 1/00 ; G04C 3/00 ; H02D 9/04 ;
Abstract
An electronically controlled mechanical timepiece includes a mechanical energy source; a generator for converting mechanical energy transmitted through a train wheel to electrical energy. A rotation controller coupled to the generator controls rotation of the generator and includes switch capable of short circuiting the generator by intermittently activating and deactivating the switch using chopper control.