US3643089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting fixture for illuminating planar surfaces
Assignee: Century Lighting Inc
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Filing: 1969-07-15
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Granted: 1972-02-15
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Expires: 1989-07-15
Abstract
Abstract A lighting fixture for illuminating planar surfaces such as walls or the like, is disclosed. The fixture comprises an ellipsoidal primary reflector open at one end and on one side on a plane generally parallel to its major axis, an elongated light source at a focus of the primary reflector and extending along a portion of the major axis thereof adjacent the focus, and a second reflector juxtaposed to the open side of the primary reflector and the light source.
Inventors
- 👤 Paul M Marantz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:48
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/02; F21S8/026; F21V; F21V21/00; F21V21/02; F21V21/04; F21V7/00; F21V7/04; F21V7/08; F21V7/09
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
229 words
A lighting fixture for illuminating a planar surface, comprising chassis means adapted to be operatively disposed in a surface extending at right angles to the surface to be illuminated, a reflector coupled to said chassis means and having an open end thereof adapted to face the surface to be illuminated when the fixture is operatively disposed, said reflector being an ellipsoidal surface having a major axis thereof extending at an oblique angle with respect to the surfaces to be illuminated when the fixture is operatively disposed, said reflector being open along a plane parallel to its major axis on its side closest the surface to be illuminated when the fixture is operatively disposed, and an elongated light source coupled to said chassis means and disposed at the focus of said reflector, the light axis of said source being coincident with the major axis of said reflector so that light rays emanating from said light source in the direction of said reflector are directed toward the surface to be illuminated, and a concave specular member coupled to said chassis means and having an open side and an open end, the open side having edges thereof adapted to be positioned flush with the surface in which the chassis means is disposed, and the open end thereof being disposed adjacent said open end of said firstmentioned reflector to define a light-emitting aperture.
Claim 2
Dependent Claim
229 words
A lighting fixture for illuminating a planar surface, comprising chassis means adapted to be operatively disposed in a surface extending at right angles to the surface to be illuminated, a reflector coupled to said chassis means and having an open end thereof adapted to face the surface to be illuminated when the fixture is operatively disposed, said reflector being an ellipsoidal surface having a major axis thereof extending at an oblique angle with respect to the surfaces to be illuminated when the fixture is operatively disposed, said reflector being open along a plane parallel to its major axis on its side closest the surface to be illuminated when the fixture is operatively disposed, and an elongated light source coupled to said chassis means and disposed at the focus of said reflector, the light axis of said source being coincident with the major axis of said reflector so that light rays emanating from said light source in the direction of said reflector are directed toward the surface to be illuminated, and a concave specular member coupled to said chassis means and having an open side and an open end, the open side having edges thereof adapted to be positioned flush with the surface in which the chassis means is disposed, and the open end thereof being disposed adjacent said open end of said firstmentioned reflector to define a light-emitting aperture.
Claim 3
Dependent Claim
49 words
A lighting fixture in accordance with claim 1, and a second reflector coupled to said chassis means and juxtaposed to the open side of said first-mentioned reflector so that rays emanating from said light source in a direction away from said first-mentioned reflector are returned to said first-mentioned reflector.
Claim 4
Dependent Claim
33 words
A lighting fixture in accordance with claim 1 wherein said concave specular member is resiliently suspended from said chassis means so that said member may be displaced for access to said chassis means.
Claim 5
Dependent Claim
45 words
A lighting fixture in accordance with claim 3 wherein said chassis means includes spaced upstanding brackets, said reflector being coupled to said brackets, and spaced upwardly extending spring members coupled to said chassis means and said concave specular member being suspended from said spring members.
Claim 6
Dependent Claim
220 words
A lighting fixture for illuminating a flat planar surface comprising a housing adapted to be recessed in a surface disposed generally at right angles to the surface to be illuminated, a curved reflector associated with said housing, an elongated light source in said housing, a second reflector in said housing adjacent said light source, said second reflector being an ellipsoidal surface having a major axis thereof extending at an oblique angle with respect to the surface to be illuminated when the fixture is operatively disposed, the major axis of said second reflector being generally parallel to the light axis of said source, said source being disposed at a focus of said second reflector, said second reflector being open at one siDe thereof to receive light rays reflected from said curved reflector, said second reflector being open at one end thereof remote from the light source so that light rays received by said second reflector are reflected toward the surface to be illuminated, and a concave specular member associated with said housing and having an open side and an open end, the open side having edges thereof adapted to be positioned flush with the surface in which the housing is recessed, and the open end thereof being disposed adjacent said open end of said second reflector to define a light-emitting aperture.
Claim 7
Dependent Claim
220 words
A lighting fixture for illuminating a flat planar surface comprising a housing adapted to be recessed in a surface disposed generally at right angles to the surface to be illuminated, a curved reflector associated with said housing, an elongated light source in said housing, a second reflector in said housing adjacent said light source, said second reflector being an ellipsoidal surface having a major axis thereof extending at an oblique angle with respect to the surface to be illuminated when the fixture is operatively disposed, the major axis of said second reflector being generally parallel to the light axis of said source, said source being disposed at a focus of said second reflector, said second reflector being open at one siDe thereof to receive light rays reflected from said curved reflector, said second reflector being open at one end thereof remote from the light source so that light rays received by said second reflector are reflected toward the surface to be illuminated, and a concave specular member associated with said housing and having an open side and an open end, the open side having edges thereof adapted to be positioned flush with the surface in which the housing is recessed, and the open end thereof being disposed adjacent said open end of said second reflector to define a light-emitting aperture.
Claim 8
Dependent Claim
40 words
A lighting fixture in accordance with claim 5 wherein the surface of said second reflector extends, adjacent its open end, beyond the intersection of a plane containing the minor axis of said second reflector and the surface of said reflector.
Claim 9
Dependent Claim
22 words
A lighting fixture in accordance with claim 5, wherein said housing and said concave specular member are coupled to a chassis means.
Claim 10
Dependent Claim
33 words
A lighting fixture in accordance with claim 7 wherein said concave specular member is resiliently suspended from said chassis means so that said member may be displaced for access to said chassis means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |