METAL HALIDE LAMP

A metal halide discharge lamp comprises an outer evacuated sealed glass envelopehaving a domed end and a socket end spaced from the domed end along a longitudinal axis. The socket end is subject to high temperature sealing fires during the lamp manufacturing process. A getter material is contained i...

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Bibliographic Details
Main Authors SCHOLZ, JOHN A, PARROTT, RICHARD A, GOODMAN, DAVID
Format Patent
LanguageEnglish
French
Published 09.08.1997
Edition6
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
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Summary:A metal halide discharge lamp comprises an outer evacuated sealed glass envelopehaving a domed end and a socket end spaced from the domed end along a longitudinal axis. The socket end is subject to high temperature sealing fires during the lamp manufacturing process. A getter material is contained in the envelope for removing gaseous materials therefrom, the getter material being positioned in the envelope in an area of the lamp remote from the socket end. A pair of electrical conductors extend into the interior of the glass envelope and an arc tube containing an arc sustaining chemical fill and including a pair of spaced electrodes is electrically connected to the electrical conductors for creating an electric arc during operation of the lamp. The getter material comprises about 70 weight percent zirconium, about 24.6 weight percent vanadium, and about 5.4 weight percent iron. The activation temperature of the getter is in the range of 400-500.degree.C.
Bibliography:Application Number: CA19972197017