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:
Feb. 14, 1978
Filed:
May. 03, 1976
Applicant:
Inventors:
Alain Dore, Conflans Sainte-Honorine, FR;
Jean Picard, Versailles, FR;
Jacques Rochereau, Montmagny, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
3403 / ; 3403 / ; 2502 / ; 235454 ; 235 / ;
Abstract
A device for reading out the position of a movable member comprising a sc carried by that member and having equidistant coded references. Each reference is different from the others. A stationary optical system forms the image of a portion of the scale on a fixed detector. The detector comprises a linear matrix of photo detectors regularly distributed at predetermined intervals and associated with electronic means which identifies the coded reference whose image is formed on the matrix and reads out the serial number of the photo element on which the leading edge of the coded reference is formed.