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:
Nov. 05, 2002
Filed:
Aug. 26, 1999
Applicant:
Inventors:
Takeo Mutoh, Tokyo, JP;
Yasuo Kitajima, Sayama, JP;
Haruhiko Higuchi, Tokorozawa, JP;
Hiroyuki Koike, Tokyo, JP;
Assignee:
Citizen Watch Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G04B 1/924 ;
U.S. Cl.
CPC ...
G04B 1/924 ;
Abstract
An electronic timepiece has a calendar advancement device resistant to external shock and capable of achieving date correction in a short time. A date dial advancement transducer ( ) is activated in response to a date dial drive signal generated by a 24-hour switch. A date advancement mechanism (a date gear train) ( ) employs a Geneva wheel for stabilizing the date dial ( ). A bounding restraint lever is regulated using an eccentric cam or the like provided coaxially with the Geneva wheel.