Electric discharge lamp

Electric lamp and discharge devices – With support and/or spacing structure for electrode and/or... – For plural electrodes of discharge device

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Details

313218, H01J 6130

Patent

active

RE0301655

ABSTRACT:
Electric discharge lamps of extended life can be produced or cheaper materials used in their manufacture by providing on the internal surface of the envelope and on the exposed surfaces of internal components a protective coating of a metal phosphate or arsenate glass. External surfaces can also be protected against corrosion in air or in the atmosphere within an outer jacket, where this is employed. The coating may be applied in a liquid medium which, preferably after draining, is warmed to evaporate the medium and thereafter baked to form the vitreous coating.

REFERENCES:
patent: 2030397 (1936-02-01), Reynolds
patent: 2393469 (1946-01-01), Hooley

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