초록 ▼

A visual display sign having a lighting unit. The reflector in the lighting unit is nearly completely sealed and has a reflecting surface that spreads the emitted light about eight degrees from the plane of circumference of the reflector. To cool the lighting unit, air is directed along the rear sur

A visual display sign having a lighting unit. The reflector in the lighting unit is nearly completely sealed and has a reflecting surface that spreads the emitted light about eight degrees from the plane of circumference of the reflector. To cool the lighting unit, air is directed along the rear surface of the sealed reflector. A small amount of the air enters the sealed reflector, causing a buildup of pressure inside the reflector and preventing any additional air from entering the reflector. This cooling system minimizes dust buildup on the reflective and light-emitting surfaces inside the reflector. The lighting units are attached to the visual display sign at a downward angle of about eight degrees from the horizontal.

대표청구항 ▼

[ We claim:] [1.] A visual display sign comprising a plurality of lighting units, each of said units further comprising:a reflector having a back, an open front, a rim with a flange surrounding said open front, an interior, a rear surface, and a reflecting surface opposite said rear surface, said ba

[ We claim:] [1.] A visual display sign comprising a plurality of lighting units, each of said units further comprising:a reflector having a back, an open front, a rim with a flange surrounding said open front, an interior, a rear surface, and a reflecting surface opposite said rear surface, said back of said reflector having an opening formed therein, said formed opening having an edge;an incandescent light source having a base and a bulb attached to said base, said bulb having a filament contained therein, said filament having a bottom, said bulb extending through said formed opening in said back of said reflector near said edge of said formed opening so that said bulb and said edge have a narrow space therebetween, said bottom of said filament substantially aligned with said formed opening;a bezel surrounding said open front of said reflector; anda lens over said open front of said reflector, said lens held by said bezel abutting said flange and forming a seal over said open front of said reflector, to prevent air from entering said interior of said reflector when said air is directed along said rear surface of said reflector so that said lighting unit is cooled.