Methods for removing contaminants from arc discharge lamps

Details Methods for removing contaminants from arc discharge lamps Methods for removing contaminants from arc discharge lamps

1991-05-01

1993-01-05

Seidel, Richard K.

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

445 6, 445 40, 445 43, H01J 932, H01J 938

Patent

active

051765586

ABSTRACT:
A method for removing contaminants from an arc tube includes introducing an inert gas into the arc tube through a conduit extending through the lamp tubulation and exhausting the gas through the space between the conduit and the wall of the lamp tubulation. Contaminated gas thereby always flows away from the arc tube. The arc tube can be heated during the gas flushing process to release adsorbed water and vaporize volatile oxides. Gas is preferably flushed through the lamps tubulation during and after press sealing of electrodes into the arc tube to remove contaminants introduced during press sealing.

REFERENCES:
patent: 2391573 (1945-12-01), Herzog
patent: 2454745 (1948-11-01), Quinn
patent: 3208812 (1965-09-01), Brundidge
patent: 3492598 (1970-01-01), MacNair
R. L. Hansler et al., "A New Low Wattage Metal Halide Process", IES Annual Conference, 1985, pp. 109-122.

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