US4143412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting fixture, for a tail, warning or signal light
Assignee: Individual
•
Filing: 1977-06-21
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Granted: 1979-03-06
•
Expires: 1997-06-21
Abstract
Abstract Lighting fixture includes a concave reflector having a given focal region and an axis, and means at least partly disposed in the focal region for supplying a source of light thereat reflectible at maximal intensity by the concave reflector in direction of the axis thereof and reflectible at decreasing intensity in direction extending from the light source at an increasing angle β relative to the direction of the axis, so that (a) at β = 1°, the light intensity is at least 200%, (b) at β = 2.5°, the light intensity is at least 150%, and (c) at β = 5°, the light intensity is at least 120% of the light intensity at β = 10°.
Inventors
- 👤 Knut O. Sassmannshausen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:31
CPC Classifications
F; F21; F21S; F21S43/00; F21S43/40; F21S43/30
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
160 words
Lighting fixture comprising a concave reflector having a given focal region and an axis, and means at least partly disposed in said focal region for supplying a source of light thereat reflectible at maximal intensity by said concave reflector generally in direction of said axis thereof and reflectible at decreasing intensity in directions extending from said light source at an increasing angle β relative to the direction of said axis, so that (a) at β = 1°, the light intensity is at least 200%, (b) at β = 2.5°, the light intensity is at least 150%, and (c) at β = 5°, the light intensity is at least 120% of the light intensity at β = 10°, said concave reflector having a reflective surface formed with a multiplicity of reflecting curved surface portions, the mean height of all thereof being equal to from 3% to 12% of the mean smallest base diameter of all of said reflecting curved surface portions.
Claim 2
Dependent Claim
160 words
Lighting fixture comprising a concave reflector having a given focal region and an axis, and means at least partly disposed in said focal region for supplying a source of light thereat reflectible at maximal intensity by said concave reflector generally in direction of said axis thereof and reflectible at decreasing intensity in directions extending from said light source at an increasing angle β relative to the direction of said axis, so that (a) at β = 1°, the light intensity is at least 200%, (b) at β = 2.5°, the light intensity is at least 150%, and (c) at β = 5°, the light intensity is at least 120% of the light intensity at β = 10°, said concave reflector having a reflective surface formed with a multiplicity of reflecting curved surface portions, the mean height of all thereof being equal to from 3% to 12% of the mean smallest base diameter of all of said reflecting curved surface portions.
Claim 3
Dependent Claim
46 words
Lighting fixture according to claim 1 wherein said means for supplying a source of light comprises a luminous body having a maximum spacing between two points thereof that is equal to at least 200% of said mean height of all of said reflecting curved surface portions.
Claim 4
Dependent Claim
30 words
Lighting fixture according to claim 2 wherein the height of substantially every individual reflecting curved surface portion is equal to from 3% to 12% of the smallest base diameter thereof.
Claim 5
Dependent Claim
51 words
Lighting fixture according to claim 2 wherein the maximum dimension of a projection of said luminous body on a plane perpendicular to the direction of the maximum spacing between said two points thereof is equal to at least 25% of said mean height of all of said reflected curved surface portions.
Claim 6
Dependent Claim
50 words
Lighting fixture according to claim 2 wherein the maximum dimension of a projection of said luminous body on a plane perpendicular to the direction of the maximum spacing between said two points thereof is equal to at least 25% of the height of substantially every individual reflecting curved surface portion.
Claim 7
Dependent Claim
56 words
Lighting fixture according to claim 2 wherein said concave reflector is a parabolic reflector, and wherein said mean smallest base diameter of all of said reflecting curved surface portions is equal at most to 40% of the spacing of the apex of said parabolic reflector from the middle of said focal region of said parabolic reflector.
Claim 8
Dependent Claim
54 words
Lighting fixture according to claim 3 wherein said concave reflector is a parabolic reflector, and wherein the smallest base diameter of every individual reflecting curved surface portion is equal at most to 40% of the spacing of the apex of said parabolic reflector from the middle of said focal region of said parabolic reflector.
Claim 9
Dependent Claim
58 words
Lighting fixture according to claim 2 wherein said concave reflector is a parabolic reflector, and wherein the surfaces of said reflecting curved surface portions form spherical calottes having a radius of curvature equal at most to 80% of the spacing of the apex of said parabolic reflector from the middle of said focal region of said parabolic reflector.
Claim 10
Dependent Claim
33 words
Lighting fixture according to claim 2 wherein said reflecting curved surface portions are formed of at least part of an ellipsoidal surface and said reflecting curved surface portions have an elongated plan view.
Claim 11
Dependent Claim
20 words
Lighting fixture according to claim 9 wherein said reflecting curved surface portions are substantially elliptical in said plan view thereof.
Claim 12
Dependent Claim
97 words
Lighting fixture according to claim 1 wherein said concave reflector has a reflecting surface formed with a multiplicity of reflecting curved surface portions in the shape of reflecting rings concentrically surrounding said axis of said concave reflector, the mean height of all of said rings being equal to from 3% to 12% of the mean width of all of said rings, said means for supplying a source of light comprising a luminous body having a maximum spacing between two points thereof that is equal to at least 200% of said mean height of all of said rings.
Claim 13
Dependent Claim
17 words
Lighting fixture according to claim 11 wherein said rings are formed of sections of reflecting toroidal surfaces.
Claim 14
Dependent Claim
53 words
Lighting fixture according to claim 11 wherein said concave reflector is a parabolic reflector, said reflecting rings being formed on the original parabolic surface thereof, and including surface regions parallel to said original parabolic surface and interrupting said reflecting rings for intensifying the light intensity in direction of said axis of said reflector.
Claim 15
Dependent Claim
53 words
Lighting fixture according to claim 2 wherein said concave reflector is a parabolic reflector, said reflecting curved surface portions being formed on the original parabolic surface thereof and carrying surface regions thereon that are parallel to said original parabolic surface for intensifying the light intensity in direction of said axis of said reflector.
Claim 16
Dependent Claim
52 words
Lighting fixture according to claim 2 wherein said concave reflector has an imaginary concave surface whereon said reflecting curved surface portions are formed, and wherein the sum of the base areas of said reflecting curved surface portions is equal to from 40% to 95% of said imaginary concave surface of said reflector.
Claim 17
Dependent Claim
14 words
Lighting fixture according to claim 2 wherein said reflecting surved surface portions are concavities.
Claim 18
Dependent Claim
14 words
Lighting fixture according to claim 2 wherein said reflecting curved surface portions are convexities.
Claim 19
Dependent Claim
14 words
Lighting fixture according to claim 2 wherein said reflecting curved surface portions are concavities.
Claim 20
Dependent Claim
156 words
Lighting fixture comprising a concave reflector having a given focal region and an axis, and means at least party disposed in said focal region for supplying a source of light thereat reflexible at maximal intensity by said concave reflector generally in direction of said axis thereof and reflectible at decreasing intensity in directions extending from said light source at an increasing angle β relative to the direction of said axis, so that (a) at β = 1°, the light intensity is at least 200%, (b) at β = 2.5°, the light intensity is at least 150%, and (c) at β = 5°, the light intensity is at least 120% of the light intensity at β = 10°, said means for supplying a source of light comprising a luminous body having a maximum spacing between two points thereof that is equal to at least 200% of said mean height of all of said reflecting curved surface portions.
Claim 21
Dependent Claim
156 words
Lighting fixture comprising a concave reflector having a given focal region and an axis, and means at least party disposed in said focal region for supplying a source of light thereat reflexible at maximal intensity by said concave reflector generally in direction of said axis thereof and reflectible at decreasing intensity in directions extending from said light source at an increasing angle β relative to the direction of said axis, so that (a) at β = 1°, the light intensity is at least 200%, (b) at β = 2.5°, the light intensity is at least 150%, and (c) at β = 5°, the light intensity is at least 120% of the light intensity at β = 10°, said means for supplying a source of light comprising a luminous body having a maximum spacing between two points thereof that is equal to at least 200% of said mean height of all of said reflecting curved surface portions.
Claim 22
Dependent Claim
33 words
Lighting fixture according to claim 2 wherein the maximum spacing between said two points of said luminous body is at least 200% of the height of substantially every individual reflecting curved surface portion.
Claim 23
Dependent Claim
137 words
Lighting fixture comprising a concave reflector having a given focal region and an axis, and means at least partly disposed in said focal region for supplying a source of light thereat reflectible at maximal intensity by said concave reflector generally in direction of said axis thereof, said concave reflector having means for reflecting said light at decreasing intensity in directions extending from said light source at an increasing angle β relative to the direction of said axis, said reflecting means being of such construction as to effect the following decreasing light intensity: (a) at β = 1°, the light intensity is at least 200%, (b) at β = 2.5°, the light intensity is at least 150%, and (c) at β = 5°, the light intensity is at least 120% of the light intensity at β = 10°.
Claim 24
Dependent Claim
137 words
Lighting fixture comprising a concave reflector having a given focal region and an axis, and means at least partly disposed in said focal region for supplying a source of light thereat reflectible at maximal intensity by said concave reflector generally in direction of said axis thereof, said concave reflector having means for reflecting said light at decreasing intensity in directions extending from said light source at an increasing angle β relative to the direction of said axis, said reflecting means being of such construction as to effect the following decreasing light intensity: (a) at β = 1°, the light intensity is at least 200%, (b) at β = 2.5°, the light intensity is at least 150%, and (c) at β = 5°, the light intensity is at least 120% of the light intensity at β = 10°.
Claim 25
Dependent Claim
30 words
Lighting fixture according to claim 19 wherein the height of substantially every individual reflecting curved surface portion is equal to from 3% to 12% of the smallest base diameter thereof.
Claim 26
Dependent Claim
56 words
Lighting fixture according to claim 2 wherein said concave reflector is a parabolic reflector, and wherein said mean smallest base diameter of all of said reflecting curved surface portions is equal at most to 40% of the spacing of the apex of said parabolic reflector from the middle of said focal region of said parabolic reflector.
Claim 27
Dependent Claim
54 words
Lighting fixture according to claim 2 wherein said concave reflector is a parabolic reflector, and wherein the smallest base diameter of every individual reflecting curved surface portion is equal at most to 40% of the spacing of the apex of said parabolic reflector from the middle of said focal region of said parabolic reflector.
Claim 28
Dependent Claim
58 words
Lighting reflector according to claim 2 wherein said concave reflector is a parabolic reflector, and wherein the surfaces of said reflecting curved surface portions form spherical calottes having a radius of curvature equal at most to 80% of the spacing of the apex of said parabolic reflector from the middle of said focal region of said parabolic reflector.
Claim 29
Dependent Claim
33 words
Lighting fixture according to claim 2 wherein said reflecting curved surface portions are formed of at least part of an elipsoidal surface and said reflecting curved surface portions have an elongated plan view.
Claim 30
Dependent Claim
97 words
Lighting fixture according to claim 2 wherein said concave reflector has a reflecting surface formed with a multiplicity of reflecting curved surface portions in the shape of reflecting rings concentrically surrounding said axis of said concave reflector, the mean height if all of said rings being equal to form 3% to 12% of the mean width of all of said rings, said means for supplying a source of light comprising a luminous body having a maximum spacing between two points thereof that is equal to at least 200% of said mean height of all of said rings.
Claim 31
Dependent Claim
53 words
Lighting fixture according to claim 2 wherein said concave reflector is a parabolic reflector, said reflecting curved surface portions being formed on the original parabolic surface thereof and carrying surface regions thereon that are parallel to said original parabolic surface for intensifying the light intensity in direction of said axis of said reflector.
Claim 32
Dependent Claim
52 words
Lighting fixture according to claim 2 wherein said concave reflector has an imaginary concave surface whereon said reflecting curved surface portions are formed, and wherein the sum of the base areas of said reflecting curved surface portions is equal to from 40% to 95% of said imaginary concave surface of said reflector.
Claim 33
Dependent Claim
14 words
Lighting fixture according to claim 2 wherein said reflecting curved surface portions are convexities.
Claim 34
Dependent Claim
33 words
Lighting fixture according to claim 19 wherein the maximum spacing between said two points of said luminous body is at least 200% of the height of substantially every individual reflecting curved surface portion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |