Abstract: A device for purifying air within a room. The device includes a housing having a plurality of air inlet ports and a plurality of air outlet ports. An ultraviolet ray generator is positioned within the housing along with a fan for drawing air into the housing through the air inlet ports. A passageway leading from the air inlet ports and encircling the ultraviolet ray generator to the air outlet ports provides a path for air drawn into the housing. The ultraviolet rays produced by the generator kill bacteria, germs and viruses in the air passing thereby through the passageway and the passageway maximizes a distance traveled by the air through the housing and thereby maximizing exposure of the air to the ultraviolet rays. The device also generates ozone for neutralizing undesirable odors, such as stale tobacco smoke and mildew in the air drawn into the housing.

Abstract: A light fixture including a fixture housing and a detachable reflector is provided with an arrangement of a cylindrical rim portion of the housing having circumferentially spaced radially outwardly projecting sets of lobes or projections which form grooves for receiving cooperating radially inwardly disposed projections on the reflector whereby the reflector may be twisted on and off of the fixture housing. The lobes on the housing are spaced apart and provided with opposed abutment surfaces which are engaged by the edges of the projections on the reflector with respect to the housing. One of the abutments includes an inclined surface whereby forcible elastic deflection of the reflector projections permits disassembly of the reflector from the housing at will. The reflector and the housing are provided with indicia to facilitate alignment, assembly and diassembly of the reflector with respect to the housing.