Sealed beam lamp including halogen bulb with light shielding lay

Details Sealed beam lamp including halogen bulb with light shielding lay Sealed beam lamp including halogen bulb with light shielding lay

1979-12-06

1981-12-08

Demeo, Palmer C.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Reflector

313117, 313222, H01K 132

Patent

active

043050158

ABSTRACT:
A sealed beam lamp is provided, comprising a lamp envelope comprised of a reflector having an open front and a lens attached to the edge of the reflector, and a halogen bulb attached to the lamp envelope so as to face the lens and having a straight filament arranged along a direction of the diameter thereof and substantially parallel with the lens and a bulb envelope whose upper end surface portion is covered with a light-shielding layer except for those side wall portions of the bulb envelope facing the ends of the straight filaments.

REFERENCES:
patent: 1691832 (1928-11-01), Sweet
patent: 3784861 (1974-01-01), Notelteirs et al.
"Modern Tungsten Halogen Lamp Technology", by J. R. Coaton, Proc. IEE, vol. 117, No. 10, Oct. 1970, pp. 1953-1959, p. 1957 and FIG. 8.

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