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:
May. 07, 2002
Filed:
Jan. 24, 2000
Applicant:
Inventor:
Norio Miyauchi, Tanashi, JP;
Assignee:
Citizen Watch Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G04B 4/700 ;
U.S. Cl.
CPC ...
G04B 4/700 ;
Abstract
An electronic apparatus with an azimuth meter is capable of measuring an accurate azimuth and is made small even if one or a plurality of magnetized members for generating a magnetic field exists. Magnetic screen is provided for shielding an azimuth sensor from a magnetic field generated from a battery and a stepping motor. Moreover, when the stepping motor rests, an azimuth is measured, and rotor rest time and a direction of the magnetic field generated from a rotor are predicted based on rotor rotation starting time and a direction of a driving current flowing through a coil, and the measured azimuth is corrected according to the predicted result.