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US 4,734,837 AGranted
Variable illumination light fixture
OwnerLance D. Chantry, Leo J. Blackmaninventors
Life of this patent
Estimating the term…
Abstract
A variable illumination light fixture which permits the level of illumination of the light fixture to be adjusted not only by dimming or brightening the intensity of the light bulb itself, but also by simultaneously closing off or opening up the fixture's light bulb.
Claims6
A variable intensity light fixture comprising:
- (a) at least one light bulb;
- (b) an enclosure for containing said at least one light bulb, said enclosure comprising an enclosure base, a pair of panels hinged to said enclosure base, and a light-pervious bellows attached to said enclosure base and extending between said two panels so as to complete said enclosure;
- (c) first means for alternately opening up or closing down said enclosure by moving said enclosure's panels away from or towards one another, respectively;
- and
- (d) second means for alternatively brightening or dimming the intensity of said at least one light bulb contained within said enclosure, said second means being linked to said first means so that (1) said enclosure can be opened up and the intensity of said at least one light bulb simultaneously increased so as to increase the illumination of said light fixture, or (2) said enclosure can be closed down and the intensity of said at least one light bulb simultaneously decreased so as to decrease the illumination of said light fixture.
2 more elements
Dependencies are inferred from the claim text.