Illumination – Light modifier – Reflector
Patent
1998-03-10
2000-04-25
Tso, Laura K.
Illumination
Light modifier
Reflector
362320, 362346, 362297, F21V 700
Patent
active
060536241
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to improvements in devices for reflecting light emitted by artificial sources.
DESCRIPTION OF THE PRIOR ART
Moderm industries requirements for artificial lighting are extensive, varied, and constantly expanding.
Many types of reflector devices associated with artificial illumination of industrial spaces are currently known, but these all require that a fixed shape and/or a fixed lamp mounting position within that shape be precisely specified to create optimal light distribution for a particular purpose. For example, a `chinaman hat` reflector might commonly be used in a situation where a wide, uniform spread of light is required. In this case, the spreading of light is largely dependant on the fixed internal angle of the cone shaped `chinaman hat` reflector. The uniformity of light emitted is therefore largely dependant on the non-adjustable lamp positioning within that reflector. These known devices have the disadvantage that their rigid, non-adjustable, designs limit their efficient use to a relatively small range of applications.
SUMMARY OF THE INVENTION
The present invention seeks to provide an adjustable heat reflecting device which overcomes the disadvantages of the prior art.
In one broad form, the present invention provides a reflector device, comprising a pair of resilient sheet members, which are normally disposed at a substantially orthogonal angle relative to each other, and which are adapted to be flexed and retained against the bias of their normal resilience such that said device is formed to a curved, and preferably double parabolic (as herein defined), shape.
Preferably, said sheet members are retained in said curved or double parabolic shape by a retaining means linked between said sheet members at substantially edge portions thereof.
Also preferably, said retaining means is a chain, or wire or like means, optionally adjustable in length.
In a preferred form, lighting means is adapted to be attached to said device when in the retained position, by an optionally adjustable attachment means.
In a preferred embodiment a heat shield is provided about at least part of said lighting means.
Preferably, said heat shield is V-shaped and secured to the underside of said lighting means.
In a preferred form, each of said sheets members are separately fabricated and then secured together to form said device.
Preferably, each of said sheet members are substantially rectangularly shaped and provided with a substantially orthogonally protruding skirt adjacent an edge of the respective sheet, whereby, to form said device, the skirt of a first sheet is connected to the edge of said second sheet, and the skirt of said second sheet is connected to the edge of said first sheet.
Also preferably, said skirts and said edges are connected by bolts, welds or the like.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will become more fully understood from the following description of a preferred but non-limiting embodiment thereof, described in connection with the accompanying drawings, wherein:
FIG. 1 shows an exploded view of one example of an adjustable reflector device according to the present invention;
FIG. 2 shows a disassembled view of the skin of the reflector device, depicting the substantially orthogonally protruding skirts, present on sheet members; and,
FIG. 3 shows an assembled view of the skin prior to flexing, depicting the substantially orthogonal alignment of sheet members.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS(S)
Throughout the drawings, like numerals will be utilized to represent similar features, except where expressly otherwise indicated.
Also, throughout the specification, the term "a double parabolic" is utilised to describe the shape of the device when it is in its flexed position, and retained against the bias of it's normal resilience, as for example, shown in FIG. 1 of the drawings. In considering this definition, it should be appreciated that any size, shape or width of double parabolic or similar shape s
REFERENCES:
patent: 3099403 (1963-07-01), Strawick
patent: 4174533 (1979-11-01), Barthes et al.
patent: 4796168 (1989-01-01), Peterson
patent: 5249110 (1993-09-01), Russello et al.
patent: 5570947 (1996-11-01), Felland
patent: 5615943 (1997-04-01), Coldren
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