US3836767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting fixtures
Assignee: NEW MWY Inc
•
Filing: 1973-02-26
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Granted: 1974-09-17
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Expires: 1993-02-26
Abstract
Abstract A compact lighting fixture, principally for outdoor use, employs a pair of reflectors in conjunction with a lamp having an elongated light source. One of the reflectors has a downwardly facing concave internal reflecting surface which surrounds the light source. The other reflector is located beneath the first reflector and has a concave external reflecting surface which faces outwardly and upwardly. The light source is aligned with the vertical axis of the fixture, which is the common axis of both reflectors. Light emitted from the source is reflected from the upper reflector to the lower reflector and is then projected outwardly, some light being projected outwardly directly from the source, without reflection. A glare baffle extends inwardly from the bottom of the upper reflector. As a result of this optical system, most of the light is projected from the fixture at a high angle relative to downward vertical, but light cut-off occurs at a selected angle less than 90* relative to downward vertical. The light is evenly distributed on the ground illuminated by the fixture. Glare is minimized. The upper reflector can be modified to produce asymmetrical horizontal light distribution patterns. The reflectors are surrounded by an enclosure having an opaque upper section and a light-transmitting lower section. Reflections from the inner surface of the loser section may provide fill-in illumination near the vertical axis of the fixture. A structural tube extends upwardly through the lower reflector and supports the upper reflector and the upper section of the enclosure upon radially extending arms. The tube may contain a spring-biased, centered receptacle for the lamp, which rests upon a seat at the top of the tube. The upper reflector may be formed in two parts, one part being fixed to a removable top wall of the upper section of the enclosure to provide access to the lamp.
Inventors
- 👤 M Lasker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:34
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/08; F21S8/081; F21S8/083; F21V; F21V21/00; F21V21/10; F21V7/00; F21V7/005; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 50
Claim 1
Independent Claim
166 words
A lighting fixture comprising upper and lower reflectors, and lower reflector being poSitioned beneath said upper reflector and having a common vertical axis therewith, an elongated light source positioned vertically along said axis between said reflectors, and means including a downwardly-facing, concave, internal reflecting surface of said upper reflector and a cooperating upwardly-outwardly-facing, concave, external reflecting surface of said lower reflector for causing light rays emitted from the upper end of said elongated source to be reflected from said surface of said upper reflector to said surface of said lower reflector and then to be reflected thereby outwardly and downwardly substantially at a first predetermined angle relative to downward vertical and for causing light rays emitted from the lower end of said source to be reflected from said surface of said upper reflector to said surface of said lower reflector and then to be reflected thereby outwardly and downwardly substantially at a second predetermined angle relative to downward vertical which is less than the first angle.
Claim 2
Dependent Claim
166 words
A lighting fixture comprising upper and lower reflectors, and lower reflector being poSitioned beneath said upper reflector and having a common vertical axis therewith, an elongated light source positioned vertically along said axis between said reflectors, and means including a downwardly-facing, concave, internal reflecting surface of said upper reflector and a cooperating upwardly-outwardly-facing, concave, external reflecting surface of said lower reflector for causing light rays emitted from the upper end of said elongated source to be reflected from said surface of said upper reflector to said surface of said lower reflector and then to be reflected thereby outwardly and downwardly substantially at a first predetermined angle relative to downward vertical and for causing light rays emitted from the lower end of said source to be reflected from said surface of said upper reflector to said surface of said lower reflector and then to be reflected thereby outwardly and downwardly substantially at a second predetermined angle relative to downward vertical which is less than the first angle.
Claim 3
Dependent Claim
79 words
A lighting fixture in accordance with claim 1, wherein said means causes light rays emitted from the upper end of said source and reflected from said surface of said upper reflector to said surface of said lower reflector to cover substantially more of the length of said surface of said lower reflector than light rays emitted from the lower end of said source and reflected from said surface of said upper reflector to said surface of said lower reflector.
Claim 4
Dependent Claim
25 words
A lighting fixture in accordance with claim 2, wherein the first-mentioned light rays cover substantially the entire length of said surface of said lower reflector.
Claim 5
Dependent Claim
40 words
A lighting fixture in accordance with claim 2, wherein the light intensity distribution of said fixture at one side of said axis in a vertical plane containing said axis is substantially in accordance with the distribution illustrated in FIG. 2.
Claim 6
Dependent Claim
94 words
A lighting fixture in accordance with claim 2, wherein said source is surrounded by said upper reflector and wherein the top of said lower reflector and the bottom of said upper reflector are positioned relative to each other and said source to provide a space through which light is emitted directly from said source outwardly and downwardly between said reflectors without reflection from said surfaces, the total amount of light emitted fro said fixture being predominantly light reflected from said reflecting surfaces rather than emitted directly from said source without reflection from said surfaces.
Claim 7
Dependent Claim
60 words
A lighting fixture in accordance with claim 5, wherein the intensity of light emitted directly from said source without reflection from said surfaces decreases progressively above a third predetermined angle relative to downward vertical up to said first angle and wherein the intensity of light reflected from said surfaces increases progressively above said third angle up to said first angle.
Claim 8
Dependent Claim
23 words
A lighting fixture in accordance with claim 6, wherein said first angle is about 67* and wherein said third angle is about 52*.
Claim 9
Dependent Claim
15 words
A lighting fixture in accordance with claim 1, wherein said first angle is about 67*.
Claim 10
Dependent Claim
15 words
A lighting fixture in accordance with claim 8, wherein said second angle is about 48*.
Claim 11
Dependent Claim
15 words
A lighting fixture in accordance with claim 1, wherein said first angle is about 80*.
Claim 12
Dependent Claim
78 words
A lighting fixture in accordance with claim 1, wherein light rays emitted from said upper end of said source at different angles in a vertical plane and reflected from said surface of said upper reflector cross over at points which in general are located laterally outward of the cross over points of light rays emitted from the lower end of said source at different angles in the vertical plane and reflected from said surface of said upper reflector.
Claim 13
Dependent Claim
95 words
A lighting fixture in accordance with claim 11, further comprising a glare baffle extending laterally inward toward said vertical axis from the vicinity of the lower end of said upper reflector, said light source haVing an envelope surrounding it, and said glare baffle intercepting rays emitted from said envelope and reflected from said surface of said upper reflector to said surface of said lower reflector along paths which would cause said rays to be reflected from said surface of said lower reflector at a maximum angle relative to downward vertical greater than said first angle.
Claim 14
Dependent Claim
15 words
A lighting fixture in accordance with claim 12, wherein said maximum angle is about 75*.
Claim 15
Dependent Claim
15 words
A lighting fixture in accordance with claim 12, wherein said maximum angle is about 90*.
Claim 16
Dependent Claim
46 words
A lighting fixture in accordance with claim 1, wherein said lower reflector is positioned with respect to said upper reflector to provide paths for the emission of light downwardly at angles less than said second angle without reflection from said reflecting surface of said lower reflector.
Claim 17
Dependent Claim
32 words
A lighting fixture in accordance with claim 15, wherein said source has an envelope and rays from said envelope extend along said paths after reflection from said surface of said upper reflector.
Claim 18
Dependent Claim
71 words
A lighting fixture in accordance with claim 1, wherein said fixture has a light-transmitting enclosure section laterally outward of said lower reflector and wherein said source is positioned relative to said lower reflector and said enclosure to provide paths from said source to said enclosure section at angles of incidence upon said enclosure section which are low enough to cause the light rays to be reflected downwardly from said enclosure section.
Claim 19
Dependent Claim
47 words
A lighting fixture in accordance with claim 1, wherein said upper reflector has a section of its reflecting surface angulated in a horizontal plane with respect to other sections of that reflecting surface for modifying the distribution in a horizontal plane of light projected by said fixture.
Claim 20
Dependent Claim
22 words
A lighting fixture in accordance with claim 18, wherein the first-mentioned section is diffusely reflecting and said other sections are specularly reflecting.
Claim 21
Dependent Claim
34 words
A lighting fixture in accordance with claim 1, wherein said upper reflector is supported upon the outer ends of arms extending laterally outward from arm supporting means at the top of said lower reflector.
Claim 22
Dependent Claim
49 words
A lighting fixture in accordance with claim 20, wherein said fixture has an enclosure with an upper section surrounding said upper reflector and supported upon the outer ends of said arms and with a lower, light-transmitting section surrounding said lower reflector and mounted upon means for supporting said fixture.
Claim 23
Dependent Claim
70 words
A lighting fixture in accordance with claim 1, further comprising an additional reflecting surface portion near the open bottom of said upper reflector for causing light rays emitted by said lower end of the light source and striking said additional reflecting surface portion to be reflected therefrom to said surface of said lower reflector for thereby being reflected outwardly and downwardly from the lighting fixture substantially at said first angle.
Claim 24
Dependent Claim
91 words
A lighting fixture comprising an upper reflector and a lower reflector, said upper reflector having a downwardly-facing reflecting surface for reflecting light to said lower reflector, said lower reflector being located beneath said upper reflector and having an outwardly facing surface for reflecting outwardly light reflected thereto by said surface of said upper reflector, a plurality of arms extending outwardly from the upper end of said lower reflector, means for supporting the inner ends of said arms, and means for supporting said upper reflector upon the outer ends of said arms.
Claim 25
Dependent Claim
91 words
A lighting fixture comprising an upper reflector and a lower reflector, said upper reflector having a downwardly-facing reflecting surface for reflecting light to said lower reflector, said lower reflector being located beneath said upper reflector and having an outwardly facing surface for reflecting outwardly light reflected thereto by said surface of said upper reflector, a plurality of arms extending outwardly from the upper end of said lower reflector, means for supporting the inner ends of said arms, and means for supporting said upper reflector upon the outer ends of said arms.
Claim 26
Dependent Claim
14 words
A lighting fixture in accordance with claim 23, wherein said arms are vertical fins.
Claim 27
Dependent Claim
54 words
A lighting fixture in accordance with claim 23, wherein said lighting fixture has an enclosure with an upper section surrounding said upper reflector and supported upon the outer ends of said arms and with a lower section of light-transmitting material surrounding said lower reflector and mounted upon base means independently of said upPer section.
Claim 28
Dependent Claim
46 words
A lighting fixture in accordance with claim 25, wherein said means for supporting the inner ends of said arms and said lower reflector are mounted on said base means, and wherein said lower section of said enclosure is supported on said base means by cushion means.
Claim 29
Dependent Claim
26 words
A lighting fixture in accordance with claim 23, wherein said fixture has a receptacle for receiving a lamp and for positioning said lamp between said reflectors.
Claim 30
Dependent Claim
37 words
A lighting fixture in accordance with claim 27, wherein said receptacle is spring-biased downwardly, and further comprising an annular seat above said lower reflector against which said lamp is seated by the spring bias of said receptacle.
Claim 31
Dependent Claim
35 words
A lighting fixture in accordance with claim 28, wherein said lower reflector is tubular and wherein said receptacle is supported for vertical movement within said lower reflector and has means for centering the receptacle therein.
Claim 32
Dependent Claim
75 words
A lighting fixture in accordance with claim 23, wherein said fixture has means for mounting a lamp beneath said upper reflector and has an enclosure with an upper section surrounding said upper reflector and having a top wall which opens, said upper reflector comprising two parts, one of which is supported upon said top wall and moves therewith relative to the other part to provide access to said lamp when the top wall is opened.
Claim 33
Dependent Claim
38 words
A lighting fixture in accordance with claim 23, wherein said means for supporting the inner ends of said arms comprises a tube extending vertically within said lower reflector and protruding therefrom at the top of said lower reflector.
Claim 34
Dependent Claim
126 words
A lighting fixture having a vertical axis and having spaced upper and lower reflectors, each of the reflectors having a reflecting surface which is a surface of revolution about said axis, and means including a light source cooperating with the reflecting surface of said upper reflector and the reflecting surface of said lower reflector for reflecting light emitted by said source from said upper reflector and then from said lower reflector in sequence and for projecting the light along different paths downwardly and outwardly from said fixture upon a horizontal plane below said fixture with intensities proportional to the lengths of the paths so that an illumination pattern with substantially even illumination is formed in said plane over a generally circular illuminated area surrounding said axis.
Claim 35
Dependent Claim
126 words
A lighting fixture having a vertical axis and having spaced upper and lower reflectors, each of the reflectors having a reflecting surface which is a surface of revolution about said axis, and means including a light source cooperating with the reflecting surface of said upper reflector and the reflecting surface of said lower reflector for reflecting light emitted by said source from said upper reflector and then from said lower reflector in sequence and for projecting the light along different paths downwardly and outwardly from said fixture upon a horizontal plane below said fixture with intensities proportional to the lengths of the paths so that an illumination pattern with substantially even illumination is formed in said plane over a generally circular illuminated area surrounding said axis.
Claim 36
Dependent Claim
50 words
A lighting fixture in accordance with claim 32, wherein said surface of said upper reflector is a downwardly concave internal surface surrounding said source and wherein said surface of said lower reflector is an outwardly concave external surface with its lower end farther from said axis than its upper end.
Claim 37
Dependent Claim
46 words
A lighting fixture in accordance with claim 33, wherein light rays from said source are reflected by the reflecting surface of said upper reflector at different angles and are redirected by the reflecting surface of said lower reflector downwardly and outwardly at substantially a predetermined angle.
Claim 38
Dependent Claim
98 words
A lighting fixture in accordance with claim 33, wherein said source is an elongated source aligned with said axis, wherein light rays from the upper end of said source reflected by the surface of said upper reflector to the surface of said lower reflector are redirected at substantially a first predetermined angle relative to downward vertical, and wherein light rays from the lower end of said source reflected by the surface of said upper reflector to the surface of said lower reflector are redirected thereby downwardly and outwardly at substantially a second predetermined angle relative to downward vertical.
Claim 39
Dependent Claim
38 words
A lighting fixture in accordance with claim 35, wherein said first angle is greater than said second angle and wherein the amount of light projected at said first angle is greater than that projected at said second angle.
Claim 40
Dependent Claim
52 words
A lighting fixture in accordance with claim 36, wherein the spacing of said reflectors provides paths thereBetween for direct downward and outward emission of light from said fixture by said source without reflection from said surfaces, the amount of such light being less than the amount of light reflected from said surfaces.
Claim 41
Dependent Claim
36 words
A lighting fixture in accordance with claim 32, wherein said fixture comprises means for cutting off the projection of light from said fixture at a predetermined angle relative to downward vertical which is less than 90*.
Claim 42
Dependent Claim
29 words
A lighting fixture in accordance with claim 38, wherein the last-mentioned means comprises a glare baffle protruding inwardly from the reflecting surface of said upper reflector toward said axis.
Claim 43
Dependent Claim
139 words
A lighting fixture comprising an upper reflector and a lower reflector having a common vertical axis, each of said reflectors having a reflecting surface which is a surface of revolution about said axis, the upper reflector surface being shaped to reflect light rays from a source to the lower reflector surface in axial planes, the lower reflector surface being shaped to reflect outwardly from said axis in axial planes light rays which are directed thereto by the upper reflector surface in axial planes, and said upper reflector having at least one reflecting surface section which is not concentric with the first-mentioned surface for directing light rays from said source to said lower reflector surface in planes which are not axial, whereby the amount of light directed by said lower reflector surface in some directions is greater than in others.
Claim 44
Dependent Claim
139 words
A lighting fixture comprising an upper reflector and a lower reflector having a common vertical axis, each of said reflectors having a reflecting surface which is a surface of revolution about said axis, the upper reflector surface being shaped to reflect light rays from a source to the lower reflector surface in axial planes, the lower reflector surface being shaped to reflect outwardly from said axis in axial planes light rays which are directed thereto by the upper reflector surface in axial planes, and said upper reflector having at least one reflecting surface section which is not concentric with the first-mentioned surface for directing light rays from said source to said lower reflector surface in planes which are not axial, whereby the amount of light directed by said lower reflector surface in some directions is greater than in others.
Claim 45
Dependent Claim
118 words
A lighting fixture comprising an upper reflector and a lower reflector having a common vertical axis, each of said reflectors having a reflecting surface which is a surface of revolution about said axis, the upper reflector surface being shaped to reflect light rays from a source to the lower reflector surface in axial planes, the lower reflector surface being shaped to reflect outwardly from said axis in axial planes light rays which are directed thereto by the upper reflector surface in axial planes, and said upper reflector having at least one reflecting surface section which is not concentric with the first-mentioned surface for directing light rays from said source downwardly and outwardly without reflection from said lower reflector.
Claim 46
Dependent Claim
118 words
A lighting fixture comprising an upper reflector and a lower reflector having a common vertical axis, each of said reflectors having a reflecting surface which is a surface of revolution about said axis, the upper reflector surface being shaped to reflect light rays from a source to the lower reflector surface in axial planes, the lower reflector surface being shaped to reflect outwardly from said axis in axial planes light rays which are directed thereto by the upper reflector surface in axial planes, and said upper reflector having at least one reflecting surface section which is not concentric with the first-mentioned surface for directing light rays from said source downwardly and outwardly without reflection from said lower reflector.
Claim 47
Dependent Claim
38 words
A lighting fixture in accordance with claim 41, there being a pair of said sections angulated oppositely in a horizontal plane to project light rays outwardly at opposite sides of said fixture without reflection from said lower reflector.
Claim 48
Dependent Claim
32 words
A lighting fixture in accordance with claim 41, wherein said fixture has a glare baffle for limiting the maximum angle with respect to downward vertical of light rays projected from the fixture.
Claim 49
Dependent Claim
72 words
A lighting fixture comprising an upper reflector, a lower reflector, and a light source, said upper reflector having a reflecting surface shaped to direct upon progressively higher elements of a reflecting surface of said lower reflector light rays emitted from a point of said source and reflected by progressively lower elements of the first-mentioned surface, said surface of the lower reflector being shaped to reflect such rays downwardly along substantially parallel paths.
Claim 50
Dependent Claim
72 words
A lighting fixture comprising an upper reflector, a lower reflector, and a light source, said upper reflector having a reflecting surface shaped to direct upon progressively higher elements of a reflecting surface of said lower reflector light rays emitted from a point of said source and reflected by progressively lower elements of the first-mentioned surface, said surface of the lower reflector being shaped to reflect such rays downwardly along substantially parallel paths.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |