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. 06, 1990
Filed:
Jun. 26, 1986
Applicant:
Inventors:
Hironori Okuda, Kobe, JP;
Takashi Matsubara, Nishinomiya, JP;
Assignee:
Shin Meiwa Industry Co., Ltd., Hyogo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
341 15 ; 341171 ;
Abstract
A rotary encoder comprises a rotator having ring-shaped multipole magnet and stator having magnetic field detecting sensors concentrically provided with the ring-shaped multipole magnet. The stator is provided with a plurality of zero-magnetostrictive amorphous ferromagnetic cores arrayed in correspondence to the magnetic pole pitch of the multipole magnet. Rotation angles of the rotor are detected by coils extended across the plurality of amorphous magnetic cores to be magnetically coupled with the same.