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:
Feb. 27, 2018
Filed:
Sep. 29, 2016
Citizen Watch Co., Ltd., Nishitokyo-shi, Tokyo, JP;
Akira Kato, Tokorozawa, JP;
Kazuya Imamura, Iida, JP;
Shoichiro Morita, Higashikurume, JP;
Yuji Yano, Kodaira, JP;
CITIZEN WATCH CO., LTD., Nishitokyo-shi, JP;
Abstract
Whether a bright state or a dark state is established is determined each time a motor is driven one step, based on a presence or absence of a passing of light through a detection hole disposed in a detection wheel that rotates associated with rotations of a hand wheel coupled with the motor. A switching position X is identified at which the dark state is switched to the bright state when the dark state is determined and thereafter the bright state is determined. A position one step after the identified switching position X is set to be a reference position X+1 of the hand wheel. The reference positions X+1 and X−1 can thereby be set after a driving mechanism is assembled.