Electric lamp and discharge devices – With gas or vapor – With particular gas or vapor
Patent
1997-07-01
1999-04-27
Patel, Vip
Electric lamp and discharge devices
With gas or vapor
With particular gas or vapor
313 25, 313634, H01J 1720
Patent
active
058982736
ABSTRACT:
A metal halide gas discharge lamp comprises an arc tube containing a vaporizable metal halide and first and second spaced electrodes. An arrangement for heating the arc tube assists in creating an arc discharge between the first and second electrodes. It comprises a heat source positioned to heat the arc tube, and an electron barrier disposed between the heat source and the arc tube for minimizing accumulation of photoelectrons on an outer surface of the arc tube so as to substantially avoid sodium migration out of the arc tube. A switch deactivates the heat source after the arc tube is heated a desired amount.
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Collins Byron R.
Kiefer George E.
Bruzga, Esq. Charles E.
General Electric Company
Patel Vip
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