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Reflector-for-multiple-source-lighting-fixture

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Reflector for multiple source lighting fixture

Details

Inventors: Gehly, Joel C.;
Assignee: American Sterilizer Company (Erie, PA)
Primary Examiner: Miller; Carl Stuart
Assistant Examiner:
Attorney, Agent or Firm: Yeager; Robert D., Ethridge; Christine R.

An improvement suitable for incorporation into a lighting fixture having a plurality of light source means for emitting light rays and at least one reflector wherein the one reflector superposes the light source means in a partially circumscribing, radially spaced relationship about the axis of symmetry of the lighting fixture to receive light rays and to project them onto a work surface. The improvement is a second reflector in axial alignment with, and rotatably mounted about, the axis of symmetry. The second reflector is positioned beneath the light source means and has a plurality of distinct surface sections, each of the surface sections being associated with one of the light source means for receiving the light rays emitted therefrom and projecting the light rays onto the one reflector. Each surface section has two radially adjacent portions. One portion has a textured finish for diffusing the light rays and the other portion has a specular finish for intensifying the light rays. The second reflector can be rotated to selectively position either the textured portion or the specular portion beneath each light source means to permit selective adjustment of the pattern and intensity of light rays projected from the lighting fixture.

DETAILED DESCRIPTION The present invention provides an improvement in lighting fixtures which permits the pattern and intensity of illumination to be adjusted by rotating one of the reflectors in the lighting fixture.
The improvement is suitable for incorporation within a lighting fixture having a plurality of light source means for emitting light rays and at least one reflector wherein the one reflector superposes the plurality of light source means in a partially circumscribing, radially spaced relationship about the axis of symmetry of the lighting fixture to receive the light rays and to project the light rays onto a work surface.
The improvement includes a second reflector in axial alignment with the axis of symmetry of the lighting fixture and positioned beneath the plurality of light source means.
The second reflector, which is superposed and partially circumscribed by the one reflector, has a plurality of distinct surface sections, each of the surface sections being associated with a different one of the light source means for receiving light rays emitted from the one light source means with which the surface section is associated and projecting light rays onto the one reflector.
Each surface section has at least two radially adjacent portions, one of the portions having a surface finished for diffusing the light rays projected therefrom and the other portion having a surface finished for intensifying the light rays projected therefrom.
The second reflector is mounted for rotation about the axis of symmetry of the lighting fixture to selectively position either the diffusing portion or the intensifying portion of the surface sections beneath each light source means to permit selective adjustment of the pattern and intensity of light rays projected from the lighting fixture.
The diffusing portion preferably has a textured finish and the intensifying portion preferably has a specular finish.
The surface area of the textured portion is preferably equal to or greater than the surface area of the specular portion

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