Illumination – Elongated source light unit or support – Plural sources or supports therefor
Reexamination Certificate
2001-05-08
2003-11-25
O'Shea, Sandra (Department: 2875)
Illumination
Elongated source light unit or support
Plural sources or supports therefor
C362S283000, C362S285000, C362S319000
Reexamination Certificate
active
06652118
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to linear luminaires having asymmetric light distribution. More particularly, this invention relates to linear luminaires having asymmetric light distribution that include internal adjustable reflectors.
Linear luminaires (e.g., fluorescent luminaires) that distribute light non-uniformly, that is, the intensity of the light emitted and reflected outward from the luminaire is not the same in all directions, some portions having is higher intensities than other portions, have asymmetric light distribution. Such light distribution allows a wall or ceiling to be evenly or uniformly “washed” (i.e., illuminated) by having light with the highest intensity directed to those portions of the wall or ceiling farthest from the luminaire.
A disadvantage of known linear asymmetrical distribution luminaires is that their reflectors are typically in a fixed position. Reflectors play an important role in aiming light produced by the luminaire. Thus, luminaires with fixed reflectors need to be positioned precisely in order to evenly wash a desired surface because once mounted, the aim of light is fixed. Many times, however, precise positioning is just not possible because of the way in which the luminaire is to be mounted or because of the luminaire locations available relative to the surface to be washed.
Moreover, although some known linear asymmetrical distribution luminaires have adjustable reflectors, none are known to have those adjustable reflectors enclosed within the luminaire's housing. Often, such external reflectors detract from the aesthetic appearance of the luminaire, which in many applications is very important.
Furthermore, it is not known whether any linear asymmetrical distribution luminaires with twin lighting units, such as those commonly used to light both sides of a hallway, have independently adjustable reflectors enclosed within the luminaire housing to allow light exiting on each side of the luminaire to be independently aimed.
In view of the foregoing, it would be desirable to be able to provide a linear asymmetric distribution luminaire having an adjustable reflector enclosed within the housing of the luminaire.
It would also be desirable to be able to provide a linear asymmetric distribution luminaire with twin lighting units having one or more independently adjustable reflectors enclosed within the housing of the luminaire.
SUMMARY of the INVENTION
It is an object of this invention to provide a linear asymmetric distribution luminaire having an adjustable reflector enclosed within the housing of the luminaire.
It is also an object of this invention to provide a linear asymmetric distribution luminaire with twin lighting units having one or more independently adjustable reflectors enclosed within the housing of the luminaire.
In accordance with this invention, a linear asymmetric distribution luminaire is provided that includes a housing having an aperture, a baffle assembly mounted to the housing over the aperture, an adjustable reflector mounted and enclosed within the housing, and an adjusting mechanism mounted within the housing and operative to adjust the reflector.
The present invention preferably includes a twin unit embodiment, each unit having an independently adjustable reflector mounted and totally enclosed within the luminaire's housing.
Advantageously, reflectors of the present invention can be adjusted without having to move or reposition the luminaire or luminaire housing. Furthermore, no other component or part of the luminaire needs to be removed in order to adjust the reflector.
Luminaires of the present invention include other features that further enhance the luminaire's versatility, such as, for example, easily removable and extendable baffle assemblies, through-wiring capabilities for side-by-side installation of continuous rows of luminaires, and optional uplighting.
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Ford Paul R.
Shemitz Sylvan R.
Fish & Neave
O'Shea Sandra
Sylvan R. Shemitz Designs, Inc.
Tuma Garry J.
Ward John Anthony
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