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:
Aug. 10, 1993
Filed:
Sep. 12, 1991
Masataka Shishido, Shizuoka, JP;
Takashi Sato, Shizuoka, JP;
Takahisa Suzuki, Shizuoka, JP;
Tetsuya Mitani, Shizuoka, JP;
Hiromitsu Tsuchiya, Shizuoka, JP;
Yazaki Corporation, Tokyo, JP;
Abstract
The discharge tube consists of an electrically insulating cylindrical body and a pair of electrodes disposed facing each other in the cylindrical body, and is sealed with an inert gas. An activation layer of a silicate compound of alkaline metal is formed over at least a part of the inner wall surface and the electrode surface, other than the discharge surface, that are exposed to the sealed gas. This activation layer helps keep the discharge inception voltage stable even when the discharge frequency changes greatly, which in turn extends the longevity of the discharge tube.