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:
Mar. 26, 1985
Filed:
Apr. 23, 1981
Applicant:
Inventors:
Masana Minami, Kawasaki, JP;
Hiroshi Tamaki, Tokyo, JP;
Tsuneo Sasaki, Tokyo, JP;
Kazuaki Kimura, Tokyo, JP;
Assignee:
Tokyo Kagaku Kikai K.K., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; G01D / ;
U.S. Cl.
CPC ...
3403 / ; 2502 / ; 2502 / ;
Abstract
An encoder having an optical measuring part establishing a vernier relationship between a code plate and a line sensor, and counters for obtaining a course reading from time serial output signals of the line sensor and a fine reading from the vernier relationship. Correction data including a change component in a magnification of a lens system are obtained from a counter. The correction data and the fine reading are supplied to a converting circuit to provide a corrected fine reading.