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:
Jan. 30, 1996
Filed:
Jul. 26, 1994
Applicant:
Inventors:
Assignee:
Heraeus Xenotest GmbH, Hanau, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
315 63 ; 315291 ; 2504921 ;
Abstract
An illumination system for weathering and fading resistance test instruments is provided with a pulse-driven xenon gas discharge lamp with an elongated discharge bulb that has an electrode spacing in the range from 10 to 50 cm; by adjusting the duty factor of the lamp current by means of an electronic control unit, a predetermined ratio between ultraviolet and infrared radiation is achieved; for the sake of light density, the lamp bulb is bent in a U.