High intensity discharge lamp with multiple filament to extingui

Details High intensity discharge lamp with multiple filament to extingui High intensity discharge lamp with multiple filament to extingui

1976-04-15

1978-05-16

Demeo, Palmer C.

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Automatic shunt circuit closing or cut-out switch

313 25, H01J 744, H05B 41231

Patent

active

040901050

ABSTRACT:
A high intensity discharge lamp in which the arc tube is located within an outer envelope. A multi-filament assembly is located within the outer envelope in series with the current supply to the arc tube. When the lamp outer envelope is broken, the filaments will burn out in the presence of air, open the current supply to the arc tube and extinguish the arc. The use of multi-filaments permits better control of the filament burn out time.

REFERENCES:
patent: 462452 (1891-11-01), Rice, Jr.
patent: 1889585 (1932-11-01), Zodrow et al.
patent: 2203550 (1940-06-01), Spanner

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