Lamp system having a torroidal light emitting member

Details Lamp system having a torroidal light emitting member Lamp system having a torroidal light emitting member

1991-08-05

1992-09-01

Cole, Richard R.

Illumination

Light source and modifier

Including reflector

362299, 362346, 313578, F21Y 714

Patent

active

051434474

ABSTRACT:
A lamp assembly particularly for a luminaire comprising a lamp having a light emitting member of generally torroidal shape and a reflector positioned and shaped to reflect light received from the light emitting member through the central opening. The light emitting member is preferably a filament of an incandescent lamp. The reflector has a cross-section comprising first and second arcs which are substantially symmetrical with respect to a line joining the center of the reflector and a point substantially at the center of the torroidal member and the shape of the reflector is that described by rotating the arcs about the line. The arcs may be elliptical or circular for example with their foci or centers positioned to achieve the required effect.

REFERENCES:
patent: 1711478 (1929-04-01), Halvorson, Jr.
patent: 1753885 (1930-04-01), Gerhardt
patent: 2415635 (1947-02-01), Hopkins
patent: 2846565 (1958-08-01), Binkley et al.
patent: 2886735 (1959-05-01), Anderson
patent: 3654512 (1972-04-01), Spiteri
patent: 4379249 (1983-04-01), Walsh

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