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:
Jan. 27, 1987
Filed:
Feb. 21, 1984
Masao Okita, Furukawa, JP;
Hiroyasu Miyata, Furukawa, JP;
Alps Electric Co., Ltd., , JP;
Abstract
An improved rotary encoder where trackability and durability is an improved and a wider installation field is no longer necessary. Particularly, a rotary encoder and a rotary driver are separated. In the rotary encoder, a rotor is provided and its circumference is provided with a reflection surface and other surface resulting in reflectivity difference. Concave and convex parts are formed at the circumference of rotor and the upper surface of convex part providing the reflecting surface. A light emitting part and the light receiving part are arranged closely so that their end surfaces placed in contact through a flat contact surface, and thereby a sufficient output voltage can be obtained as compared with the other end surface structure. Moreover, the light emitting part and light receiving part are arranged adjacent circumference of the, and rotor, and adequate space is formed between the rotor and holding means for assuring free rotation under the no contact condition.