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. 24, 1994
Filed:
May. 30, 1990
Kiyoshi Hayashi, Hyogo, JP;
Susumu Ootera, Hyogo, JP;
Hirosh Sato, Hyogo, JP;
Yoshihiko Utsui, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A strain detector which is improved in corrosion resistance and moisture resistance and is high in reliability. The strain detector comprises a driven member, a magnetic shielding layer of a non-magnetic or diamagnetic material selectively formed on the driven member, a magnetic layer formed at a portion of the driven member at which the magnetic shielding layer is not formed, and a detecting coil provided corresponding to the magnetic layer. The magnetic layer may be formed in such a manner as to project from the driven member by selectively removing a surface of the driven member. Preferably, a protecting layer is formed on surfaces of the magnetic layer and the magnetic shielding layer. A process of producing such strain detector is also disclosed by which a magnetic shielding layer can be formed only at a required portion of a driven member readily in a short period of time.