The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 1988
Filed:
Feb. 06, 1987
Glenn A Baker, Scottsdale, AZ (US);
Other;
Abstract
In order to eliminate glare from a space illuminated by an uplight luminaire, an elongated reflector is employed in conjunction with a pair of mutually vertically oriented fluorescent lamps to obtain uniform light intensity on the space ceiling. The reflector, in cross section, includes a central point from which first and second line segments extend symmetrically in opposite directions and at slight respective downward angles. At the end of each of the first and second line segments, one or more additional line segments extend upwardly and at such angles as to simulate corresponding sections of a parabolic curve. The pair of fluorescent lamps are situated in over and under mutual orientation and are disposed with their axes positioned vertically immediately above and parallel with the longitudinal extension of the central point. As a result of this reflector/lamp-pair combination, a 'bat wing' light intensity distribution pattern is achieved in which the least illumination of the ceiling area within the field of illumination is directed straight up and systematically more intense illumination is directed outwardly and angularly to thereby obtain uniform illumination intensity across the ceiling surface. The uniformity of distribution is independent of the spacing of the luminaire from the space ceiling.