Heavy duty floodlight fixture

A floodlight fixture of the type having a housing with a transparent front wall, rigid top and bottom walls which have aligned holes through either of which access may be had to the interior of the housing, and a reflector facing the transparent wall, a closure member detachably secured to each of said rigid top and bottom walls over the hole therein, and a lamp socket on one of said closure members to receive the base of a lamp,

• said fixture being characterized by an improved shock resistant mounting for its lamp comprising the combination of:
• A. means on said one of the closure members forming a socket-receiving cavity which opens to the interior of the housing and has a ledge at the mouth thereof;
• B. an annular diaphragm of resiliently yieldable material having its peripheral portion seated on and secured to said ledge;
• C. a substantially rigid carrier embracing the lamp socket, said carrier having a closed end to which the socket is attached and an open end provided with mounting flange means;
• D. means securing said mounting flange means to the inner edge portion of the annular diaphragm, with the carrier and the socket attached thereto located in said cavity and spaced from the walls thereof so as to be free to move to the extent the resiliency of the diaphragm permits such motion;
• E. a ring of a size to embrace the end portion of a lamp opposite its base, said ring having
• 1. a cylindrical portion to encircle the protuberance at the outer end of a lamp bulb of the type having an enlarged medial portion and a protuberance projecting therefrom,
• 2. a first outwardly projecting flange on and encircling one end of the ring, to engage the adjacent surface of the enlarged medial portion of the lamp bulb, and
• 3. a second outwardly projecting flange on and encircling the other end of the ring;
• F. a plurality of circumferentially spaced studs projecting inwardly from the other one of said closure members and passing loosely through holes in the second outwardly projecting flange on said ring;
• G. springs encircling said studs and confined between said second outwardly projecting flange on the ring and said other closure member yieldingly urging the ring towards said annular diaphragm, so that said springs and the resilient yieldability of the diaphragm coact to floatingly hold the lamp and isolate the same from shocks to which the fixture may be subjected;
• and
• H. abutments on the studs to limit spring produced movement of the ring when such movement is not limited by the presence of a lamp.