Low noise sodium vapor lamp for sonic pulse operation

Details Low noise sodium vapor lamp for sonic pulse operation Low noise sodium vapor lamp for sonic pulse operation

1976-08-02

1977-12-06

Demeo, Palmer C.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313184, 313217, 313227, 313332, H01J 61068, H01J 6122, H01J 6136

Patent

active

040619397

ABSTRACT:
Jacketed high pressure sodium vapor lamps of conventional construction operated on sonic frequency pulses with short duty cycles in order to raise the color temperature produce excessive acoustic noise. The noise level is reduced by using non-magnetostrictive material for the inleads extending from the base into the outer envelope and including the portions embedded in the press of the stem, and for the frame parts that support the arc tube within the outer envelope.

REFERENCES:
patent: 2918592 (1959-12-01), Pomfrett et al.
patent: 3832588 (1974-08-01), McVey et al.
patent: 3882346 (1973-05-01), McVey
patent: 3883763 (1975-05-01), Kearny
patent: 3899708 (1975-08-01), Tartakoff et al.

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