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:
Oct. 15, 1991
Filed:
Dec. 26, 1989
Applicant:
Inventors:
Ryoichi Kurosawa, Kokubunji, JP;
Kozo Taira, Tokyo, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
25023114 ; 2502 / ; 25023116 ;
Abstract
A rotation detector includes a rotary disk in which slits are recorded, and a photodetector for reading the slits with a laser beam. The slits is constituted by concave and convex parts having different widths radially formed on one surface of the rotary disk at different intervals. The width of one of the concave and convex parts constituting the slits which has a smaller width or slit interval is set to be smaller than the spot size of the laser beam.
Quick Actions:
Kurosawa, Ryoichi. (1991). Optical rotation detector including a disk having slits with concave and (U.S. Patent No. 5057685). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5057685
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile