Bowl mirrored lamp

Details Bowl mirrored lamp Bowl mirrored lamp

1979-10-19

1982-02-23

Karlsen, Ernest F.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Reflector

313315, H01J 314

Patent

active

043170609

ABSTRACT:
Bowl mirrored lamps according to the invention have a filament which is arranged asymmetrically with respect to the axis of the lamp envelope and surrounds the axis over an angle greater than 180.degree. in such a manner that it does not coincide at any point with the image of the filament formed by the mirrored bowl portion of the lamp envelope.
As a result of this filament positioning the lamp can in combination with a reflector provide a light beam having a very high central intensity.

REFERENCES:
patent: 2115839 (1938-05-01), Briefer
patent: 2181291 (1939-11-01), Biggs
patent: 2218345 (1940-10-01), Spaeth

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