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:
Dec. 22, 1992
Filed:
Sep. 07, 1990
Mitsubishi Cable Industries, Ltd., Amagasaki, JP;
Tokyo Tatsuno Co., Ltd., Tokyo, JP;
Abstract
The invention provides a sensor whose conductive sheet is composed of substantially non-cross-linked thermoplastic elastomer and conductive carbon. The conductive sheet has a maximum of 70 of Shore A-hardness. By virtue of the above structure, the sensor very sharply responds to electric resistance of the conductive sheet against presence of low molecular weight organic liquid such as gasoline and vapor thereof to quickly detect leaked organic liquid or vapor with extremely sharp sensitivity. Furthermore, the detection system of the invention using the above sensor has a simple circuit which precisely detects varied electric resistance of the conductive sheet. The detection system characteristically incorporates an alarm generator to instantly warn operators of the presence of leaked organic liquid such as gasoline and vapor thereof.