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:
May. 27, 1997
Filed:
Jul. 25, 1995
Ushiodenki Kabushiki Kaisha, Tokyo, JP;
Abstract
A discharge lamp provided with an anode of the water cooled type achieves advantageous cooling directly connected a tungsten tip piece to a tip of a body element of the anode that is formed of copper has a water cooling arrangement therein, by having a maximum outer diameter of the tungsten tip piece about equal to an outer diameter D (mm) of the body element, and by maintaining the relationship between the outer diameter D and the thickness of the tungsten tip piece L of: 0.2.ltoreq.L/D.ltoreq.0.5. In accordance with a preferred embodiment, the tungsten tip piece is directly connected to a tip of a cylindrical body element inside of which a cooling water feed tube is arranged extending coaxially to the body element, and in which cooling water is fed from a base of this cooling water feed tube, along the cooling water feed tube, strikes an inner side of the tip end of the body element and finally is conveyed through a gap between an inner side of the body element and an outer side of the cooling water feed tube which serves as a cooling water drainage duct. Preferably, the tungsten tip piece has the shape of a truncated cone whose maximum outer diameter is about equal to the outer diameter D (mm) of the body element and a thickness in a lengthwise direction of the body element.