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:
Dec. 15, 1987
Filed:
Oct. 18, 1984
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B / ; G11B / ; H01L / ;
U.S. Cl.
CPC ...
324208 ; 324252 ; 338 / ; 360113 ;
Abstract
A device for magnetically detecting displacement, in which the middle points between the magnetic poles N and S of the magnetic signals recorded in different tracks, which are adjacent to each other, stand on common straight lines perpendicular to the direction of displacement and the direction from N to S of the magnetic signals is always the same, so that the magnetic signals in the different tracks, which are adjacent to each other, are aligned side by side and magnetic leakage between them is prevented.