Patent ID: 7503145

Claim:
The fire-resistance-rated, floor-ceiling assembly having: a pre-assembled, fire-resistance-rated, recessed lighting assembly installed above a room and projecting light through an opening in said fire-resistance-rated floor-ceiling assembly into said room, wherein said fire-resistance-rated floor-ceiling assembly had an original fire resistance rating before said opening was made therein and exhibits (i) an upper surface facing an interior of said fire-resistance-rated floor-ceiling assembly, and (ii) a lower surface facing a room below said fire-resistance-rated floor-ceiling assembly, wherein fire resistance is determined by (i) exposing to fire for one hour in accordance with ASTM E119 (1999) in which a 48 inch by 48 inch small scale floor-ceiling assembly constructed with a joist cavity containing a recessed light assembly and an adjacent joist cavity without a recessed light assembly is so exposed and (ii) measuring air temperatures in the joist cavities, whereby a one hour fire resistance rating is achieved when temperature measurements in the joist cavity with an incandescent light fixture is no more than 5% hotter than temperatures measured in the adjacent joist cavity without said light fixture, said pre-assembled, fire-resistance-rated, recessed lighting assembly with a combination comprising: (a) a lamp socket configured to receive a lamp element and electrically communicating with an electrical junction box by wires extending from said lamp socket, (b) a light can that effectively surrounds said lamp socket and directs light from said lamp element downwardly through said opening in said fire-resistance-rated floor-ceiling assembly, (c) a fire resistant housing that effectively surrounds said light can, and (d) a gasket between said housing and said upper surface of said fire-resistance-rated floor-ceiling assembly and effectively surrounding the opening made in said fire-resistance-rated floor-ceiling assembly for said pre-assembled, fire-resistance-rated, recessed lighting assembly, wherein said pre-assembled, fire-resistance-rated, recessed lighting assembly maintains said original fire resistance rating of said fire-resistance-rated, floor-ceiling assembly before said opening was made therein for installing said pre-assembled, fire-resistance-rated, recessed lighting assembly therein.