Double bulb type halogen lamp in which a space between inner and

Details Double bulb type halogen lamp in which a space between inner and Double bulb type halogen lamp in which a space between inner and

1989-12-26

1992-03-03

Yusko, Donald J.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313113, 313578, 313635, H01K 126

Patent

active

050936018

ABSTRACT:
In a double bulb type halogen lamp, a sealed space between the inner surface of an outer bulb and the outer surface of the inner bulb in which a coiled filament is disposed is filled with a weak oxidation gas to avoid deoxidation of the optical interference film composed of metal oxide substances exposed to the sealed space.

REFERENCES:
patent: 4463277 (1984-07-01), DeCaro
patent: 4634919 (1987-01-01), Yuge
patent: 4701663 (1987-10-01), Kawakatsu et al.
patent: 4918352 (1990-04-01), Hess et al.
patent: 4942331 (1990-07-01), Bergman et al.

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