Incandescent lamp with ellipsoidal envelope

Details Incandescent lamp with ellipsoidal envelope Incandescent lamp with ellipsoidal envelope

H - Electricity

01

K

313/19

H01K 1/14 (2006.01) H01K 1/32 (2006.01)

Patent

CA 1165798

INCANDESCENT LAMP WITH ELLIPSOIDAL ENVELOPE Abstract of the Disclosure 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.

384182

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