Johns Manville

Daryl Dean Sullivan

Herbert Arnold Odle

Robert Dale Zeller

Jan Shadwick

Kurt Franck

Donald Edward Ruehl

Dale Eugene Welty

The present invention relates to a luminaire and more particularly a downlight for industrial lighting applications. Energy considerations, lowered ceiling heights, and greater demand for illumination uniformity has resulted in a demand for a versatile and efficient downlight. The present invention anticipates providing a reflector, lamp, and refractive lens construction which utilizes an incrementally painted reflective surface to provide a versatile spacing between each downlight in an array, using the same basic downlight configuration. The refractive lens includes prismatic refractor elements which reshape the downwardly directed conical beam of light to provide even more uniform illumination when used in conjunction with the plurality of such downlights arrayed in an industrial lighting situation.

Enclosed industrial luminaire

An arrangement for lighting a given straight section of a roadway having spaced-apart parallel curbs is disclosed herein and includes a luminaire positioned a substantial distance to one side of and above the roadway curbs. The luminaire includes a reflector, light source and a refractor which cooperate to effectively and efficiently light the given roadway section while, at the same time, minimizing the amount of light which spills onto opposite sides of the roadway curbs.

Luminaire and luminaire reflector for use in an off-the roadway lighting

The measurement of equivalent sphere illumination on a given task located in a lighted area is disclosed herein. This is accomplished by comparing a movably mounted task in the lighted area with the same task in a control area illuminated with sphere illumination. The task is viewed alternatively in the two areas in accordance with specific optical procedures to determine the equivalent sphere illumination on the task in the lighted area.

Method of and assembly for measuring equivalent sphere illumination

A sign lighting arrangement including a luminaire located in a predetermined position in front of a rectangular sign is disclosed herein. The luminaire includes a light source supported by an opaque housing, the uppermost edges of which lie in a common plane with the light source and the bottom edge of the sign. In this manner, direct light from the light source is prevented from passing under the sign (positive bottom edge cut-off). The luminaire also includes a reflector having lateral edge portions located in a fixed position relative to the luminaire's light source and the sign. The reflector and particularly these lateral edge portions are specifically contoured so that the lateralmost vertical edges of the reflected light substantially coincide with the side edges of the sign. Thus no reflected light passes beyond these side edges (positive side edge cut-off). A refractor is provided one purpose of which is to aid in achieving positive side edge cut-off.

Luminaire for lighting a sign and method

An arrangement for indirectly lighting a room by directly lighting the ceiling within the room is disclosed herein and includes a plurality of luminaires spaced from one another within the room. Each luminaire is spaced below the ceiling, preferably supported on the floor of the room in a readily mobile fashion, and directs light onto the ceiling both directly above it in the direction of zenith and at wide angles with zenith.

Growing community of inventors

Newark, OH, United States of America

Daryl Dean Sullivan