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:
Oct. 02, 2001
Filed:
Nov. 19, 1998
Roy D. Roberts, Hayward, CA (US);
ILC Technology, Inc., Sunnyvale, CA (US);
Abstract
An arc lamp comprising a hollowed-anode electrode with an arc-face having a central hole extending to an internal chimney. An opposing cathode electrode faces the hollowed anode electrode for providing a short electric arc around the central hole in the arc-face of the hollowed anode electrode. The anode and cathode electrodes are disposed in an inert gas, such as xenon. The internal gas is subject to an “arc wind” for transporting metal deposits downstream of the short electric arc and flowing from the short electric arc down the chimney. Such operation provides for an improvement in arc lamp life because the reflector blackens far less rapidly. A magnetic z-pinch pumping mode can be used to move the arc wind away from the reflector.