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:
Nov. 04, 1980
Filed:
Jan. 02, 1979
Applicant:
Inventors:
Shinichi Menju, Atsugi, JP;
Kunio Takahashi, Yokohama, JP;
Eiichi Haginomori, Tokyo, JP;
Yoichi Murakami, Yokohama, JP;
Eiichi Zaima, Tokyo, JP;
Assignees:
Tokyo Shibaura Denki Kabushiki Kaisha, Tokyo, JP;
Tokyo Denryoku Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73572 ;
Abstract
In a method for detecting foreign matters present in gas sealed electrical apparatus including a tank at the ground potential and containing an insulating gas and a high voltage live part disposed in the tank, a voltage is applied to the high voltage live part causing generation of ultrasonic waves and the ultrasonic waves propagated through the tank is sensed by a sensing element mounted on the tank.