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. 08, 1982
Filed:
Dec. 04, 1979
John P Dakin, Chandlers Ford, GB;
David A Kahn, Bittern, GB;
Plessey Incorporated, New York, NY (US);
Abstract
A position indicating system for affording an indication of the instantaneous position of a movable member, such as a rotating shaft, comprises means for producing light in different color bands directed on to a suitably coded structure movable in accordance with movement of the movable member or coded structure which itself carried filter means for separating light into different colors. Optical fibre means is located for receiving colored light passing through the movable coded structure and for transmitting light to light detector means for producing an output dependent upon the light received by the optical fibre means and indicative of the instantaneous position of the movable member.