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:
Jun. 28, 2022
Filed:
Oct. 18, 2018
Applicant:
Seiko Instruments Inc., Chiba, JP;
Inventor:
Kenji Ogasawara, Chiba, JP;
Assignee:
SEIKO INSTRUMENTS INC., Chiba, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G04C 3/14 (2006.01); H02P 8/34 (2006.01); H02P 8/02 (2006.01);
U.S. Cl.
CPC ...
G04C 3/14 (2013.01); G04C 3/143 (2013.01); H02P 8/02 (2013.01); H02P 8/34 (2013.01);
Abstract
A timepiece movement includes a stepping motor having a rotor for rotating an indicating hand, and a control unit for rotating the rotor by using a main drive pulse and an auxiliary drive pulse. When the indicating hand is rotated using a detection drive pulse based on the main drive pulse, the control unit determines a reference position of the indicating hand by detecting a rotation state of the rotor.