Wrap-around parabolic light fixture and method for manufacture
First Claim
1. A lighting fixture for mounting therein a lamp having an elongate axis, comprisinga housing at least partially surrounding the elongate axis of the lamp so as to leave an opening on one side thereof for light emanations, said housing having a plurality of internal planar side walls,first reflector position stop means connected to one of said internal housing side wall,second reflector position stop means connected to another of said internal housing side walls, anda flexible reflector sheet havinga first edge held in position by said first reflector position stop means, anda second edge held in position by said second reflector position stop means,the shape of said reflector sheet being determined by the points of contact said sheet makes with said internal planar side walls between said first and second stop means.
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Accused Products
Abstract
An improved light fixture for housing an elongated lamp and method for making same, the fixture having an elongated housing constructed from a continuous rectangular piece of sheet metal having four parallel bends therein forming planar side walls. The planar side walls form flange planes suitable for mating within grooves formed in suitable end pieces for the housing. The closure lens completes the housing. The construction of the elongated housing side walls is such that a reflector sheet when curvedly affixed to the two outermost planar side walls is tangential to the inner three planar side walls, thereby providing a parabolic reflecting surface for a lamp mounted within the reflector sheet. Two end wall reflectors, preferably one of which is directionally adjustable, also reflect luminous flux from the lamp. An adjustable light support for the non-electrical end of the elongated lamp, along with the adjustable end wall reflector, conveniently allows the improved light fixture to accept various sized elongated lamps without substantial loss of light reflecting capabilities.
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Citations
22 Claims
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1. A lighting fixture for mounting therein a lamp having an elongate axis, comprising
a housing at least partially surrounding the elongate axis of the lamp so as to leave an opening on one side thereof for light emanations, said housing having a plurality of internal planar side walls, first reflector position stop means connected to one of said internal housing side wall, second reflector position stop means connected to another of said internal housing side walls, and a flexible reflector sheet having a first edge held in position by said first reflector position stop means, and a second edge held in position by said second reflector position stop means, the shape of said reflector sheet being determined by the points of contact said sheet makes with said internal planar side walls between said first and second stop means.
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18. The process of manufacturing a light reflector system including a parabolic reflector for a lamp mounted therein, which comprises
forming a housing for the light reflector having planar first and second side walls angled inwardly from the opening of the reflector at complementary 45 degree angles, and at least one intermediate wall therebetween joining said first and second side walls on the side of the lamp opposite the opening, the distance along a line perpendicular to and through the axis of the lamp to said first and second side walls being at least four times the distance as the normal distance from the axis of the lamp to said intermediate wall, connecting stop means above and outwardly of the points on said side walls to which the perpendicular is measured, and forming a flexible reflecting sheet into an arc, opposite edges thereof being retained by said first and second stop means, said arc being tangent to said side walls and extending to a distance from said lamp axis of one-fourth the linear distance between the points.
Specification