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:
Nov. 29, 1988
Filed:
Nov. 21, 1986
Applicant:
Inventor:
Toshiaki Fujiwara, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
2502 / ; 2502 / ; 356375 ; 341-2 ; 341 13 ;
Abstract
A rotary encoder having first and second slit disks are disposed between a light emitting diode and a light sensor coaxially in proximity to each other, the two slit disks each having a large number of slits formed radially at equal intervals in a peripheral edge portion of the disks, the first slit disk being connected to and rotated by a rotational shaft, and the second slit disk being rotated by interlocking gears in a direction opposite to that of the first disk.