High-pressure discharge lamp and reflector combination

Details High-pressure discharge lamp and reflector combination High-pressure discharge lamp and reflector combination

1979-08-15

1981-09-15

Walsh, Donald P.

Illumination

Light source and modifier

Ionized gas or vapor light source

362345, F21V 720

Patent

active

042900972

ABSTRACT:
A-C high-pressure discharge lamp and reflector combination assembly in which the reflector and the lamp are each separately and individually cemented into a base, but are not cemented together. Ventilation openings are formed between the lamp and the reflector in the base, to permit air to pass between the base and the lamp, and between the lamp and the reflector. Preferably, the reflector at the end remote from the base is surrounded with a ceramic end ring, at the inner circumference of which extends a metallic ribbon or strip which has radially extending connecting portions to the electrical terminals of the lamp, placed edgewise with respect to the light radiation to provide for essentially shadowless electrical connection and high-voltage insulation between the lamp terminals. Constructing the lamp as an a-c lamp permits lifetimes in the order of hundreds of hours for a lamp of comparable power and size with respect to d-c high-pressure lamps.

REFERENCES:
patent: 3700881 (1972-10-01), Slomski
patent: 3703635 (1972-11-01), Burkarth
patent: 3720822 (1973-03-01), Rochester

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