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US 5,327,042 AGranted
Metal halide lamp
AssigneeOsram Sylvania Inc.
InventorsSimone P. Bazin, Richard A. Parrott, Edward H. Nortrup
Life of this patent
Estimating the term…
Abstract
A halide discharge lamp has a an evacuated outer envelope including a getter comprising from about 60 to about 85 percent zirconium, from about 10 to about 20 percent vanadium, and from about 2 to about 10 percent manganese having an activation temperature of less than about 350 degrees Centigrade for reducing the tendency of the lamps to discolor during operation.
Claims7
A metal halide discharge lamp comprising:
- an outer evacuated sealed glass envelope and a getter material contained in said envelope for removing gaseous materials therefrom,
- a pair of electrical conductors extending into the interior of said glass envelope;
- an arc tube disposed within the outer glass envelope, said arc tube containing an arc sustaining chemical fill and including a pair of spaced electrodes being electrically connected to said electrical conductors for creating an electric arc during operation of said lamp;
- said getter material comprising from about 60 to about 85 percent zirconium, from about 10 to about 20 percent vanadium, and from about 2 to about 10 percent manganese, and having an activation temperature of less than about 350 degrees Centigrade.
1 more element
Dependencies are inferred from the claim text.