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. 19, 1990
Filed:
Aug. 29, 1988
Katsuyuki Ara, Ibaraki, JP;
Hideyuki Yagi, Ibaraki, JP;
Hideo Imeda, Amagasaki, JP;
Toshitsugu Ohmura, Amagasaki, JP;
Megumi Ohmine, Amagasaki, JP;
Masaharu Moriyasu, Amagasaki, JP;
Japan Atomic Energy Research Institute, both of, JP;
Mitsubishi Denki Kabushiki Kaisha, both of, JP;
Abstract
A method of manufacturing a heat resisting magnetic scale is disclosed which comprises a manufacturing process in which at least a part of a heat resisting base is heated and a manufacturing process in which the part which has been heated is immediately cooled down for the purpose of changing the magnetic characteristics of the part of the base which has been heated and the Curie point of the part which has been heated is raised to 100.degree. C. or higher. A heating resisting magnetic scale which cannot be demagnetized at high temperatures and cannot be separated even if it is subjected to rapid change in temperatures, and which exhibits excellent stability and measuring precision.