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. 23, 1989
Filed:
Sep. 03, 1986
Applicant:
Inventor:
Shigeo Yoneda, Yamatokoriyama, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
2502 / ; 2502 / ;
Abstract
A photoelectric rotary encoder comprises some optical sensor pairs of light emitting elements and light receiving elements, a rotary disc formed with a plurality of slits at a first pitch, and a fixed plate provided with some slits at a second pitch. The first pitch is greater than the second pitch. Preferably, the difference between the first pitch and the second pitch is smaller than a half of the first pitch.