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:
Aug. 05, 1986
Filed:
Oct. 15, 1984
Wataru Shimizu, Tokyo, JP;
Akira Yamashita, Tokyo, JP;
Kabushiki Kaisha SG, Tokyo, JP;
Abstract
This device comprises a first detector having a first rotor and a first stator for detecting an absolute rotational position within one cycle which corresponds to 1/N circumference, said rotor having teeth of N, and a second detector having a second rotor coupled with the first rotor and a second stator for detecting an absolute rotational position within one circumference within one cycle which corresponds to one circumference. The first and second stators are respectively provided with primary coils and secondary coils. The respective primary coils are excited by reference AC signals generated in response to a clock pulse signal from a clock pulse generator. Phase differences between first and second output signals produced from the secondary coils of the respective detectors and the reference AC signals are obtained by counting the clock pulse signal.