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US 5,510,965 AGranted
Adjustable reflector/director for fluorescent light fixture
AssigneePlast-D-Fusers, Inc.
InventorJoe F. Teakell
Life of this patent
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AssigneePlast-D-Fusers, Inc.
InventorJoe F. Teakell
Estimating the term…
Fluorescent tube lights have improved reflectors and light directors or dimming devices characterized by elongated light element protection tubes sleeved over the light elements and having a reflective and/or variable opacity surface formed thereon whereby the direction and intensity of light may be varied by rotating the protection tubes with respect to the light fixture. The light element protection tubes have a variable light blocking surface formed thereon or on a flexible plastic film insert which may be sleeved within the tubes to provide for improved projection of light direction and intensity. The light blocking surface is formed by an opaque portion and opposed variable opacity portions having a dot matrix pattern. The modified light reflecting and light blocking protection tubes may be otherwise conventional protection tubes which are usable in many applications including fluorescent light fixtures at office workstations.
A light control device for an elongated light source, such as a tubular fluorescent light element, said device comprising:
A light control device for an elongated light source, such as a tubular fluorescent light element, said device comprising:
In a fluorescent light fixture having at least one elongated generally tubular fluorescent light element and an elongated tube disposed around said light element and supported on said light fixture for rotation with respect to said light element, a variable light blocking insert adapted to be sleeved within said tube and adapted to vary the direction and intensity of light emitted by said light element with respect to an object exposed to light projected from said light element, said insert including a variable light blocking surface thereon, said variable light blocking surface including an elongated opaque portion extending over a predetermined mined distance from opposite sides of a central axis of said surface and opposed portions of variable opacity being disposed adjacent to said opaque portion, respectively, and radially spaced with respect to said central axis and arranged such that, in response to rotation of said tube, at least one of the direction and intensity of light emitted by said light element with respect to said object may be varied.
Dependencies are inferred from the claim text.