Nutone, Inc.

Werner W Krebs

A recessed lighting fixture for installation in an insulated ceiling uses a reflector assembly configuration to passively facilitate the movement of thermally induced air currents to distribute and communicate steady uniform air heated by the fixture lamp to a temperature responsive circuit interrupter. The reflector assembly includes a pair of concentric downwardly facing cones connected at their upper ends and sealed about the lamp socket. The cones are spaced, forming a cone shaped air gap therebetween. The space within the inner cone surrounding the lamp connects through holes at the upper end of the inner reflector with the gap between the cones. The lower rim of the outer cone is suspended above the lower rim of the inner cone to form an annular air passage connecting the lower end of the gap with the chamber between the housing and the outer reflector in which the circuit interrupter is positioned on the inside housing surface. Air heated by the lamp flows from the space around the lamp through the holes in the inner reflector, through the gap and through the anular space to the housing chamber where it circulates past the circuit interrupter.

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Crestview Hills, KY, United States of America

Werner W Krebs