Arc discharge lamp with spring-mounted arc tube and shroud

Details Arc discharge lamp with spring-mounted arc tube and shroud Arc discharge lamp with spring-mounted arc tube and shroud

1990-12-06

1991-12-24

DeMeo, Palmer C.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

H01J 6134

Patent

active

050755889

ABSTRACT:
A metal halide arc discharge lamp includes an arc tube and a light-transmissive shroud mounted within a lamp envelope. The arc tube and the shroud are mechanically supported within the lamp envelope by resilient spring members. Since the support structure for the arc tube and the shroud is mechanically and electrically isolated from the lamp stem, leakage current between the support structure and the electrical inleads is eliminated, thereby reducing sodium loss from the arc tube and extending the operating life of the lamp. The spring-mounted construction enables the lamp to withstand mechanical shock and vibration.

REFERENCES:
patent: 3250934 (1966-05-01), Peterson
patent: 4678960 (1987-07-01), Reiling
patent: 4888517 (1989-12-01), Keeffe et al.

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