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:
Sep. 20, 1983
Filed:
Nov. 09, 1981
Applicant:
Inventor:
Sigeyuki Akita, Okazaki, JP;
Assignee:
Nippon Soken, Inc., Nishio, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B / ; G01P / ; G01R / ;
U.S. Cl.
CPC ...
324208 ; 324 / ; 324173 ;
Abstract
A rotation detecting apparatus includes a transformer consisting of a primary coil disposed to be energized by an energizing source and two secondary coils connected in opposite polarity to each other on the longitudinal sides of the primary coil. The magnetic coupling of the transformer is changed in response to the rotation of a rotating body and this changes the phase of the composite voltage signal of the secondary coils. By virtue of this construction, not only the rotation of the rotating body can be detected at low rotational speeds, but also the rotation can be detected accurately without being affected by the ambient temperature.