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. 04, 1994
Filed:
Nov. 16, 1992
Applicant:
Inventors:
Hitoshi Iwata, Aichi, JP;
Katsuhiro Minami, Aichi, JP;
Hisahiro Ando, Aichi, JP;
Hisashi Hirose, Aichi, JP;
Shigeru Iguchi, Aichi, JP;
Assignee:
Kabushiki Kaisha Tokai Rika Denki Seisakusho, Aichi, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01F / ; G01B / ; G01N / ; G01R / ;
U.S. Cl.
CPC ...
296021 ; 32420725 ; 3242072 ;
Abstract
This invention relates to a rotation sensor which detects the magnetic field which changes with the rotation of a rotary shaft, thereby to detect the amount of rotation of the rotary shaft. The rotation sensor of the present invention has the boundaries between magnetized regions set with high precision. The boundaries forms magnetic fields stably, whereby the detection of rotation is performed with high accuracy.