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:
Jun. 09, 1998
Filed:
Feb. 29, 1996
Applicant:
Inventors:
Antognini Luciano, Corcelles/Ne, CH;
Christophe Dayer, La Chaux-de-Fonds, CH;
Roger Lagger, Les Hauts-Geneveys, CH;
Assignee:
PORTESCAP, La Chaux-de-Fonds, CH;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
25023114 ; 25023116 ; 25023118 ;
Abstract
An optical encoder having a detector device including four light detectors, each formed of an elongated light sensitive surface. Free zones of this surface alternate with zones covered by an opaque layer arranged so that the cooperation of the light detectors with an encoder disc which leads to the delivery of output signals in phase quadrature, each light detector generating an output signal of a single phase.