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:
Jul. 04, 1995
Filed:
Feb. 05, 1993
Applicant:
Inventors:
Nelson M Shen, Palo Alto, CA (US);
David A Horsma, Palo Alto, CA (US);
Marc F Moisson, Leuven, BE;
Narendra Kulkarni, Sunnyvale, CA (US);
Assignee:
Raychem Corporation, Menlo Park, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; H01J / ; G01N / ;
U.S. Cl.
CPC ...
385 13 ; 385 12 ; 385140 ; 385147 ; 25022711 ; 25022714 ; 25022716 ; 25022725 ; 73 73 ; 73800 ;
Abstract
An optical fiber water sensor includes a mandrel having a convex or concave shape adjacent to an optical fiber which is adjacent to a water swellable material held in a reservoir. Upon coming in contact with water, the material swells and deforms a section of the optical fiber about a contour defined by the mandrel thus attenuating a signal propagating through the fiber which is detected by an optical detector to indicate the presence of water.