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:
Oct. 02, 2012
Filed:
Oct. 20, 2010
Kei Hirano, Chiba, JP;
Kei Hirano, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
To provide a calendar mechanism wherein the building-in property of a second date indicator is improved, and an analog timepiece equipped therewith. A calendar mechanism of an analog timepiece includes a first date indicator which includes a first date character indication portion, a first date indicator gear portion, and an endless ring-shaped drive cam portion; a drive cam lever which includes an operating lever portion including a first fan-shaped gear portion, wherein a driven lever portion is spring loaded in order to become a cam follower, and the operating lever portion is pivoted in accordance with the driven lever portion abutting against the drive cam portion; a second date indicator which, being rotatable, includes a second date character indication portion and a second fan-shaped gear portion meshing with the first fan-shaped gear portion; and a positioning/locking portion. In a case in which the tens column of the date is 0, one portion of the drive cam lever abuts against the positioning/locking portion, causing the cam follower of the driven lever portion to remain in a condition out of contact with an invalid cam face portion of the cam face of the drive cam portion.