Luminaire attachment device

Claim 1

A luminaire comprising, in combination, support means comprising a socket having a screw-threaded wall defining a socket bore open at one end, said wall having an opening therein, an elongated spring member having an intermediate mounting portion and opposite end portions, said spring member secured to said socket wall with one end portion received in said wall opening and normally protruding therefrom into said socket bore, the opposite end portion of said spring member extending along said wall and formed with a catch portion, optical means having an open top threadably engaging said screw- threaded socket wall and yieldably engaged by said protruding spring end portion for firmly holding said optical means in removable assembly in said socket, and a cage-like guard having an open end secured to said support means and extending around said optical means, said support means having inwardly directed flange means at the open end of said socket, said guard formed at its open end with a shoulder portion, said guard being rotatable in one direction relative to said support means with said shoulder portion engaging said flange means for moving said guard into attached position, said shoulder portion formed with recess means engaged by said spring catch portion for yieldably holding said guard in attached position on said support means, said guard being rotatable in the opposite direction for releasing said recess means thereof from said spring catch portion for detaching said guard from said attached position.