Abstract: A heat shield is disclosed for rectangular PAR lamps in which the shield is mechanically attached to the roof of the lamp by two rails into which the shield slides.

Abstract: A self-ventilating, enclosed, lighting device for dental, medical or the like uses having a frame of predetermined configuration with a light source mounted therein, a transparent shield mounted on and covering an open front thereof, and a light reflector mounted on the back and generally covering the open back. Inlet air passages are formed generally at the front of the device and exit air passages are formed generally at the back of the device. Airflow is created by convection heating of the air by the light source to cause an airflow into the lighting device through the inlet air passages, through the interior of the lighting device and around the light source, and out of the lighting device through the exit air passages for cooling the lighting device. The reflector is preferably pivotally mounted on the frame for being moved between an open position for access to the interior of the lighting device and a closed position during use of the lighting device.

Abstract: For enabling a quasimonochromatic high intensity light beam to be produced by a source having a lamp equipped with a cold light mirror, a heat protection filter in the light beam path and a system for cooling the heat protection filter, the source is further provided with an interference filter and projection optics located in the beam path downstream of the heat protection filter, and the interference filter is disposed in the optics.

Abstract: A recessed fluorescent light system includes a pair of saddle-shaped brackets having depending side legs resting on parallel bars of a hung ceiling structure, releasably locked thereto by bracket-carried lower spring latch members. A ballast and wire housing channel is coupled to the bracket top cross bars by bracket-mounted latch springs which also project through bracket transverse legs to define baffle assembly latch members. A horizontal plate reflector extends between and beyond the channel depending legs and is secured thereto. The plate includes depending longitudinal end flanges and inwardly spaced depending dimples. A light baffle assembly includes longitudinal upwardly and inwardly curved reflector plates terminating in horizontal flanges underlying and spaced from the side borders of the horizontal reflector by the dimples and spaced also from the depending flanges to delineate a sound attenuating tortuous elongated shallow air return passageway.

Abstract: An extremely lightweight, high-intensity illumination device utilizing polymer optical fibers to transmit light from a remote light source, and having a head-supported frame of the eyeglass type, in which the fibers are terminated in two or more bundles to provide a converging light pattern with minimal shadow effects. The remote light source employs a combination of dielectric mirrors and a heat-resistant glass rod to filter substantially all heat-producing infrared radiation from the light emitted by the source.

Abstract: Enclosure for an illuminating fixture used in operating rooms. The enclosure comprises an upper enclosure section and a lower enclosure section which are heat insulated from each other. The lower section contains an opening for the transmission of light from the light source enclosed in the fixture. The inner surface of the lower section has good reflection characteristics for infrared light. The inner surface of the upper section has good characteristics for absorbing infrared light. The outside (back) surface of the upper section has good characteristics for emitting heat.

Abstract: A bar-type display utilizing incandescent lamps stacked in a linear array in a metallic lamp block preferably of aluminum shaped to form a parabolic reflector configuration along its length and a tongue and groove configuration for attachment to an insulating connector block. Fins are provided on each side of the block for heat dissipation and grooves are formed transversely of the block through the parabolic reflector configuration at intervals into which barrier plates are inserted to sectionalize the block into separate reflectors for each lamp. To disperse the radiated and reflected light, a plastic diffuser is placed across the top of the reflector configuration, which may be colored to color the transmitted light, and to provide anti-reflective qualities for non-glare viewing.The insulator connecting block is molded to the lamp block and the lamp pins are arranged so that alternate lamps may be powered by separate power supplies for redundancy purposes.

Abstract: A heat pipe to remove heat from a light fixture in a room of a building that will transfer the fixture heat to a system in a building that will in turn reject or use the fixture heat in a heating, ventilating, air conditioning system for the building.