Arc discharge lamp with spring-mounted arc tube, shroud and fram

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

1990-12-06

1991-11-12

DeMeo, Palmer C.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

H01J 6134

Patent

active

050650696

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 attached to a frame. The frame is mechanically supported within the lamp envelope by resilient spring members. Since the frame is mechanically and electrically isolated from the lamp stem, leakage current between the frame 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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