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. 23, 2013
Filed:
Sep. 13, 2011
Masayuki Koda, Chiba, JP;
Hiroki Uchiyama, Chiba, JP;
Matsuo Kishi, Chiba, JP;
Miei Sato, Chiba, JP;
Takashi Niwa, Chiba, JP;
Masayuki Koda, Chiba, JP;
Hiroki Uchiyama, Chiba, JP;
Matsuo Kishi, Chiba, JP;
Miei Sato, Chiba, JP;
Takashi Niwa, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A detent escapement for a timepiece capable of decreasing energy loss with respect to a free oscillation of a balance and improving a timekeeping accuracy is provided. In addition, a detent escapement of a timepiece capable of realizing miniaturization and suppressing variations in the accuracy of a finished product due to assembly errors is provided. A one-side actuating spring of a detentis formed so that a maximum stress portion, which is generated at the time of operating due to the contact of an unlocking stonewhen a balanceis return-rotated, is present to be perpendicular to a first straight line Lwhich connects the center of the balance staffand a fulcrumof the blade, and to be the side opposite to the balance by a second straight line Lwhich passes through the fulcrum