Incandescent lamp with ellipsoidal envelope and infrared reflect

Details Incandescent lamp with ellipsoidal envelope and infrared reflect Incandescent lamp with ellipsoidal envelope and infrared reflect

1980-08-20

1983-04-05

Demeo, Palmer C.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

313113, 313315, 313578, H01J 114, H01J 132

Patent

active

043792499

ABSTRACT:
An incandescent electric lamp having an envelope in the shape of an ellipse rotated about a center line and defining a circle of focal points, said envelope having thereon a coating which reflects infrared energy produced by the filament and at least a part of the coating transmitting all or a selected portion of the visible range light energy produced by a filament which is shaped and located so that at least a part of the filament lies on or adjacent to the focal circle so that infrared energy produced by the filament at one focal point on the circle will be reflected by the coating back to another focal point on the circle.

REFERENCES:
patent: 2144521 (1939-01-01), Bergmans et al.
patent: 2218346 (1940-10-01), Spaeth
patent: 4160929 (1979-07-01), Thorington et al.
patent: 4283653 (1981-08-01), Brett

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