Oxygen protected electric lamp

Details Oxygen protected electric lamp Oxygen protected electric lamp

1988-12-21

1990-08-14

Wieder, Kenneth

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313 26, 313634, 313637, 313643, H01J 6112, H01J 6134

Patent

active

049490036

ABSTRACT:
A double jacket arc lamp is disclosed. A double jacket arc lamp may be formed with an electric lamp capsule having an inner light transmissive envelope with electrical leads extending from the inner envelope through a first seal, and a second light transmissive envelope sealed to the inner envelope at a second seal to substantially surround the electric lamp capsule and form an enclosed volume between a portion of the exterior of the inner envelope and the interior of the outer envelope, and leaving the leads unenclosed by the outer envelope. The lamp leads then pass through only one seal, and have no portions exposed in the intermediate insulating volume. The intermediate volume of the double jacket arc lamp may include a fill gas including a noninert component. In particular, the fill gas may include oxygen which is thought to have useful gettering and glass preservation attributes. The use of oxygen in the fill gas allows the lamp to operate at a higher temperature, and therefore more efficiently.

REFERENCES:
patent: 1984426 (1934-12-01), Pirani et al.
patent: 3110833 (1963-11-01), Larson
patent: 4499396 (1985-02-01), Fohl et al.

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