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. 07, 1988
Filed:
Jun. 03, 1986
Applicant:
Inventor:
Kenshu Watanabe, Mito, JP;
Assignee:
Doryokuro Kakunenryo Kaihatsu Jigyodan, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250227 ; 250577 ; 250225 ;
Abstract
A method of detecting liquid leakage from a wall portion of apparatus and/or tubes containing a liquid. A cover member is attached to an outer surface of the wall portion to form a space defined between the cover member and the wall portion, and an optical fiber is inserted into the space through a hole in the cover member. A light beam is supplied through a palarized beam splitter to the optical fiber such that reflected light from the end of the optical fiber is measured, and the presence of leakage is determined in accordance with the amount of reflected light.