Electric lamp and discharge devices – Having heating means to control gas/vapor – gas or vapor... – Discharge device gettering
Patent
1997-07-02
1998-03-24
Horabik, Michael
Electric lamp and discharge devices
Having heating means to control gas/vapor, gas or vapor...
Discharge device gettering
313 25, 313559, H01J 6126, H01J 1724
Patent
active
057316627
ABSTRACT:
A metal halide discharge lamp includes an outer evacuated sealed glass envelope having 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.degree.-500.degree. C.
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Goodman David
Parrott Richard A.
Scholz John A.
Day Michael
Horabik Michael
McNeill William H.
Osram Sylvania Inc.
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