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:
Jul. 27, 2010
Filed:
Aug. 04, 2005
Yoshinobu Ito, Hamamatsu, JP;
Tsuyoshi Minamizawa, Hamamatsu, JP;
Koji Matsushita, Hamamatsu, JP;
Hamamatsu Photonics K.K., Hamamatsu-shi, Shizuoka, JP;
Abstract
A gas discharge tube which generates discharge between an anodeand a cathodedisposed within a sealed containerin which a gas is sealed, includes a cylindrical partrestricting the discharge path, the cylindrical part being disposed between the anode and the cathode and having a through holefor narrowing the discharge path between the anode and the cathode, and a discharge shielding partwhich is disposed so as to cover a surrounding of the part restricting the discharge path and is electrically insulated from the part restricting the discharge path, wherein the part restricting the discharge path has a cathode side end projecting by a predetermined projecting amount more than a surface on the cathode side of the discharge shielding part and an anode side end projecting into a spaceon the side where the anode is positioned so that a high-density electron region is formed only in a part on the cathode side of the through hole of the part restricting the discharge path to reliably generate starting discharge, preferably perform heat radiation of the anode, and reduce evaporated products from the anode.