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:
Jun. 19, 1990
Filed:
Feb. 14, 1989
Jurgen Heider, Munich, DE;
Manfred Gurel, Munich, DE;
Abstract
To permit use of a metal halide discharge lamp for general service illumiion requiring a color temperature of below 4100 K., and preferably about 4000 K., or even less, for example about 3500 K., a metal halide discharge lamp is fitted into a reflector and closely surrounded by a closed transparent tube of hard glass or quartz glass, which may be coated with an indium-tin-oxide (ITO) layer. The surrounding tube is retained against the base structure of the lamp adjacent the reflector apex, or fitted against the reflector, and closed at the other end either by an end cap integral with the tube, or by a separate cap element, retrained in position by a bridging strip spanning the light exit opening of the reflector. Preferably, the reflector is faceted.