Wide angle beam pattern lamp
First Claim
1. A lighting device for the projection of an elongated wide angle beam of light in a defined spatial plane wherein the improvement comprises:
- a) a light source for the emission of light rays,b) a first reflector for reflecting light rays emitted by said light source to form a first light beam said first reflector comprising;
a portion of a first concave surface of revolution developed about a first axis of revolution, said first surface of revolution having;
a first focal point;
a first vertex;
a first focal length and;
a first focal plane perpendicular to said first axis of revolution intercepting said first focal point;
c) a second reflector for reflecting light rays emitted by said light source to form a second light beam said second reflector comprising;
a portion of a second concave surface of revolution developed about a second axis of revolution, said second surface of revolution having;
a second focal point;
a second vertex;
a second focal length; and
a second focal plane perpendicular to said second axis of revolution intercepting said second focal point;
d) means for attachment of said second reflector at an angle with respect to said first reflector such that said second focal plane intersects said first focal plane at a first acute angle of intersection;
e) means for locating said light source relative to said first and said second focal points so that said first and said second reflected light beams first converge, then finally diverge at a first angle of divergence in said defined spatial plane which exceeds said first acute angle of intersection;
f) a third reflector for reflecting light rays emitted by said light source to form a third light beam. Said third reflector comprising;
a portion of a third concave surface of revolution developed about a third axis of revolution, said third surface of revolution having;
a third focal point;
a third vertex;
a third focal length; and
a third focal plane perpendicular to said third axis of revolution intercepting said third focal point;
g) means for attachment of said third reflector at an angle with respect to said first reflector such that said third focal plane intersects said first focal plane at a second acute angle of intersection.
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Accused Products
Abstract
A vehicular warning light has multiple segments of concave parabolic reflectors assembled for cooperative spreading of the light emitted from a single electric lamp to form an elongated wide angle beam of light in a horizontal plane for alerting the neighborhood to the presence and movement of the emergency vehicle. The axis of revolution of each parabolic reflector is assembled at a differing azimuth angle within the common horizontal plane and the focal points and focal planes of the respective reflectors are dispersed. The equivalent center point of the single light source is therefore defocused relative to at least some of the reflectors. The axis of the elongated light source is centered on the common horizontal plane and is parallel to the fluted light cover lens which is contoured for efficiency in light transmission from the multiple reflectors and for additional spreading and luminous uniformity.
27 Citations
20 Claims
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1. A lighting device for the projection of an elongated wide angle beam of light in a defined spatial plane wherein the improvement comprises:
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a) a light source for the emission of light rays, b) a first reflector for reflecting light rays emitted by said light source to form a first light beam said first reflector comprising; a portion of a first concave surface of revolution developed about a first axis of revolution, said first surface of revolution having; a first focal point; a first vertex; a first focal length and; a first focal plane perpendicular to said first axis of revolution intercepting said first focal point; c) a second reflector for reflecting light rays emitted by said light source to form a second light beam said second reflector comprising; a portion of a second concave surface of revolution developed about a second axis of revolution, said second surface of revolution having; a second focal point; a second vertex; a second focal length; and a second focal plane perpendicular to said second axis of revolution intercepting said second focal point; d) means for attachment of said second reflector at an angle with respect to said first reflector such that said second focal plane intersects said first focal plane at a first acute angle of intersection; e) means for locating said light source relative to said first and said second focal points so that said first and said second reflected light beams first converge, then finally diverge at a first angle of divergence in said defined spatial plane which exceeds said first acute angle of intersection; f) a third reflector for reflecting light rays emitted by said light source to form a third light beam. Said third reflector comprising; a portion of a third concave surface of revolution developed about a third axis of revolution, said third surface of revolution having; a third focal point; a third vertex; a third focal length; and a third focal plane perpendicular to said third axis of revolution intercepting said third focal point; g) means for attachment of said third reflector at an angle with respect to said first reflector such that said third focal plane intersects said first focal plane at a second acute angle of intersection. - View Dependent Claims (2, 3, 4, 6, 8, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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5. A lighting device for the projection of an elongated wide angle beam of light in a defined spatial plane wherein the improvement comprises:
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a) a light source for the emission of light rays, b) a first reflector for reflecting light rays emitted by said light source to form a first light beam said first reflector comprising; a portion of a first concave surface of revolution developed about a first axis of revolution, said first surface of revolution having; a first focal point; a first vertex; a first focal length and; a first focal plane perpendicular to said first axis of revolution intercepting said first focal point; c) a second reflector for reflecting light rays emitted by said light source to form a second light beam said second reflector comprising; a portion of a second concave surface of revolution developed about a second axis of revolution, said second surface of revolution having; a second focal point; a second vertex; a second focal length; and a second focal plane perpendicular to said second axis of revolution intercepting said second focal point; d) means for attachment of said second reflector at an angle with respect to said first reflector such that said second focal plane intersects said first focal plane at a first acute angle of intersection; e) means for locating said light source relative to said first and said second focal points so that said first and said second reflected light beams initially converge, then finally diverge at a first angle of divergence in said defined spatial plane which exceeds said first angle of intersection; f) means for assembly of said light source and said first reflector wherein said first light beam initially converges upon said first axis of revolution then diverges from said first axis of revolution for increased final divergent spreading of said first and said second light beams in said defined spatial plane, said means including; i) locating said first reflector on the side of said first focal plane facing said first vertex; and ii) locating said light source between said first reflector and a plane that is perpendicular to said defined spatial plane and coincident with said first axis of revolution, g) a third reflector of light for reflecting light rays emitted by said light source to form a third light beam said third reflector comprising; a portion of a third concave surface of revolution developed about a third axis of revolution, said third surface of revolution having; a third focal point; a third vertex; a third focal length; and a third focal plane perpendicular to said third axis of revolution intercepting said third focal point; h) means for attachment of said third reflector at an angle with respect to said first reflector such that said third focal plane intersects said first focal plane at a second acute angle of intersection.
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7. A lighting device for the projection of an elongated wide angle beam of light in a defined spatial plane wherein the improvement comprises:
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a) a light source for the emission of light rays, b) a first reflector for reflecting light rays emitted by said light source to form a first light beam said first reflector comprising, a portion of a first concave surface of revolution developed about a first axis of revolution, said first surface of revolution having; a first focal point; a first vertex; a first focal length and; a first focal plane perpendicular to said first axis of revolution intercepting said first focal point; c) a second reflector for reflecting light rays emitted said light source to form a second light beam said second reflector comprising; a portion of a second concave surface of revolution developed about a second axis of revolution, said second surface of revolution having; a second focal point; a second vertex; a second focal length; and a second focal plane perpendicular to said second axis of revolution intercepting said second focal point; d) means for attachment of said second reflector at an angle with respect to said first reflector such that said second focal plane intersects said first focal plane at a first acute angle of intersection; e) means for locating said light source relative to said first and said second focal points so that said first and said second reflected light beams first converge, then finally diverge at a first angle of divergence in said defined spatial plane which exceeds said first acute angle of intersection; f) means for assembly of said light source and said first reflector wherein said first light beam initially converges upon said first axis of revolution then diverges from said first axis of revolution for increased final divergent spreading of said first and said second light beams in said defined spatial plane, said means including; i) locating said first reflector on the side of said first focal plane facing said first vertex; and ii) locating said light source between said first reflector and a plane that is perpendicular to said defined spatial plane and coincident with said first axis of revolution, g) means for assembly of said light source and said second reflector wherein said second light beam initially converges upon said second axis of revolution then diverges from said second axis of revolution for increased final divergent spreading of said first and said second light beams in said defined spatial plane, said means including; i) locating said second reflector on the side of said first focal plane facing said second vertex; and ii) locating said light source between said second reflector and a plane that is perpendicular to said defined spatial plane and coincident with said second axis of revolution, h) a third reflector of light for reflecting light rays emitted by said light source to form a third light beam said third reflector comprising; a portion of a third concave surface of revolution developed about a third axis of revolution, said third surface of revolution having; a third focal point; a third vertex; a third focal length; and a third focal plane perpendicular to said third axis of revolution intercepting said third focal point; i) means for attachment of said third reflector at an angle with respect to said first reflector such that said third focal plane intersects said first focal plane at a second acute angle of intersection.
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10. A lighting device for the projection of an elongated wide angle beam of light in a defined spatial plane wherein the improvement comprises:
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a) a light source for the emission of light rays, b) a first reflector for reflecting light rays emitted by said light source to form a first light beam said first reflector comprising; a portion of a first concave surface of revolution developed about a first axis of revolution, said first surface of revolution having; a first focal point; a first vertex; a first focal length and; a first focal plane perpendicular to said first axis of revolution intercepting said first focal point; c) a second reflector for reflecting light rays emitted by said light source to form a second light beam said second reflector comprising; a portion of a second concave surface of revolution developed about a second axis of revolution, said second surface of revolution having; a second focal point; a second vertex; a second focal length; and a second focal plane perpendicular to said second axis of revolution intercepting said second focal point; d) means for attachment of said second reflector at an angle with respect to said first reflector such that said second focal plane intersects said first focal plane at a first acute angle of intersection; e) means for locating said light source relative to said first and said second focal points so that said first and said second reflected light beams first converge, then finally diverge at a first angle of divergence in said defined spatial plane which exceeds said first acute angle of intersection; f) means for assembly of said light source and said first reflector wherein said first light beam initially converges upon said first axis of revolution for increased final divergent spreading of said first and said second light beams in said defined plane, said means including; i) locating said first reflector on the side of said first focal plane facing said first vertex; and ii) locating said light source between said first reflector and a plane that is perpendicular to said defined spatial plane and coincident with said first axis of revolution, g) means for assembly of said light source and said second reflector wherein said second light beam initially converges upon said second axis of revolution then diverges from said second axis of revolution for increased final divergent spreading of said first and said second light beams in said defined spatial plane, said means including; i) locating said second reflector on the side of said second focal plane facing said second vertex; and ii ) locating said light source between said second reflector and a plane that is perpendicular to said defined spatial plane and coincident with said second axis of revolution, h) a third reflector of light for reflecting light rays emitted by said light source to form a third light beam said third reflector comprising; a portion of a third concave surface of revolution developed about a third axis of revolution, said third surface of revolution having; a third focal point; a third vertex; a third focal length; and a third focal plane perpendicular to said third axis of revolution intercepting said third focal point; i) means for attachment of said third reflector at an angle with respect to said first reflector such that said third focal plane intersects said first focal plane at a second acute angle of intersection, j) means for locating said light source relative to said first and said third focal points such that said first and said third reflected light beams first converge, then finally diverge at a second angle of divergence in said defined spatial plane which exceeds said second acute angle of intersection; k) means for assembly of said light source and said third reflector wherein said third light beam initially converges upon said third axis of revolution then diverges from said third axis of revolution for increased final divergent spreading of said first and said third light beams in said defined plane, said means including; i) locating said third reflector on the side of said third focal plane facing said third vertex; and ii) locating said light source between said third reflector and a plane that is perpendicular to said defined spatial plane and coincident with said third axis of revolution.
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Specification