Process for fabricating high sodium vapor lamp

Details Process for fabricating high sodium vapor lamp Process for fabricating high sodium vapor lamp

1977-09-06

1979-05-29

Lazarus, Richard B.

316 20, H01J 938

Patent

active

041565509

ABSTRACT:
In a high pressure sodium vapor lamp, sufficiently small quantities of sodium and mercury are inserted therein so that all of the added sodium and mercury will be vaporized when the lamp is operated. The quantities are so selected that a completed lamp exhibits high efficiency, remarkable color rendition and durability. Also, the lamp can produce a suitable arc voltage by means of a less expensive ballast. The small quantity of sodium added is accurately controlled by decomposing sodium azide NaN3. The small quantity of mercury is accurately controlled by decomposing Ti-Hg alloy or Al-Zr-Ti-Hg alloy.

REFERENCES:
patent: 2465062 (1949-03-01), Clack
patent: 3093430 (1963-06-01), Wiley
patent: 3203901 (1965-08-01), Della Porta
patent: 3315116 (1967-04-01), Beese
patent: 3453477 (1969-07-01), Hanneman et al.
patent: 3788724 (1974-01-01), Schenkels et al.
patent: 3957328 (1976-05-01), Van Der Wolf et al.

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