Patents Assigned to Lam Lighting Systems
  • Patent number: 5278738
    Abstract: A wall light fixture is disclosed which includes a hollow generally translucent bowl. The bowl has an upwardly opening recess formed therein and a reflector is mounted in the bowl within the recess. The reflector has a predetermined light reflective pattern in order to reflect light from a source contained within the reflector to reflect light upwardly relative to the frame and laterally to at least a portion of the transparent bowl so that the bowl reflects light within it to provide an entirely luminous surface on the bowl.
    Type: Grant
    Filed: January 28, 1993
    Date of Patent: January 11, 1994
    Assignee: Lam Lighting Systems, Inc.
    Inventor: Glenn M. Illes
  • Patent number: 4974137
    Abstract: A luminaire for high intensity indirect lighting providing a horizontally symmetrical light distribution with peak candle power at low angles is disclosed. The luminaire includes an inner light directing member nested in spaced relation within a generally dome-shaped outer translucent member. The inner light directing member includes means for directing the majority of light emitted by an axially located vertical light source out of the upwardly facing open end of the light directing member after no more than one reflection, and means for illuminating the outer translucent member to a substantially homogenious brightness level comparable to that of the surrounding ceiling.
    Type: Grant
    Filed: April 11, 1990
    Date of Patent: November 27, 1990
    Assignee: Lam Lighting Systems
    Inventors: Royal H. Evans, Jr., Robert Rutledge
  • Patent number: 4833575
    Abstract: The present invention provides a brightness equalizing light filter system which can be utilized as the bottom panel or as one of a set of bottom panels in an indirect fluorescent light fixture to evenly illuminate the fixture to approximately the same degree of brightness as the surrounding area which it lights. The brightness equalizing light filter system comprises a translucent diffuser panel with an opaque, electrically-connected pattern of thin metal film deposited thereon, wherein the density of the opaque pattern for each point on the panel is proportional to (or the linear function of) the intensity of light impinging on that point from the light source. The metal film serves both as the required electrical ground to act as a starting aid for the lamps and as a reflecting surface to increase the photometric efficiency of the fixture.
    Type: Grant
    Filed: June 15, 1988
    Date of Patent: May 23, 1989
    Assignee: Lam Lighting Systems
    Inventor: James L. Hamilton