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. 24, 1991
Filed:
May. 31, 1990
Susumu Sato, Akita, JP;
Yoshihiro Togashi, Nagoya, JP;
Norio Ito, Nagoya, JP;
Koichi Ishii, Nagoya, JP;
Shinji Yasuda, Nagoya, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Susumu Sato, Akita, JP;
Abstract
A device for detecting an electrical abnormality in an electrical device filled with insulating gas. A surface on a light reflecting prism placed within the electrical device carries a color indicator material. The color indicator material changes color when acidic gas is present. This gas is formed when an electrical abnormality such as a short circuit occurs in the presence of the insulator gas. A light source provides light to the prism which reflects light back having a color which varies according to the color of the color indicator material. The color of the reflected light is analyzed to determine if an electrical abnormality is present.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile