Metal halide lamp having lead metal powder to reduce blackening

Details Metal halide lamp having lead metal powder to reduce blackening Metal halide lamp having lead metal powder to reduce blackening

1978-12-08

1981-01-13

Segal, Robert

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For plural electrodes of discharge device

H01J 1720, H01J 6118

Patent

active

042451752

ABSTRACT:
A high pressure metal halide discharge lamp of the sodium-scandium type which has the maintenance thereof improved by the addition of a small quantity of lead metal powder. The lead metal powder is added to the discharge sustaining fill in an amount of from between about 0.4 and 1.2 wt. % of the total amount of discharge sustaining fill.

REFERENCES:
patent: 3398312 (1968-08-01), Edris et al.
patent: 3407327 (1968-10-01), Koury et al.
patent: 3513344 (1970-05-01), Larson
patent: 3521110 (1970-07-01), Johnson
patent: 4001626 (1977-01-01), Drop et al.

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