Ceiling luminaire

Claim 2

A luminaire comprising, in combination, a housing comprising a top, a plurality of side walls and an open bottom, one of said side walls being detachably mounted on said housing, electrical operating means mounted on said detachable side wall, an optical assembly in said housing comprising optical support means detachably secured to said housing, and light transmitting cover means removably closing the open bottom of said housing, said detachable side wall having a bottom portion provided with hinge means turnably engaging said housing for swingable movement of said detachable side wall between an installed position forming a wall of said housing and a detached position away from said housing.

Claim 3

A luminaire comprising, in combination, a housing comprising a top, a plurality of side walls and an open bottom, one of said side walls being detachably mounted on said housing, electrical operating means mounted on said detachable side wall, an optical assembly in said housing comprising optical support means detachably secured to said housing and lamp holder means secured to said support means, and light transmitting cover means removably closing the open bottom of said housing, said electrical operating means being mounted on the outer side of said detachable side wall, said detachable side wall having hanger means on the inner side thereof, said optical support means comprising a side portion detachably engageable with said hanger means for swinging movement thereon of said support means between an inoperative hanging position and an operative installed position, said optical support means having a top portion spaced below the top of said housing in said operative position, a reflector on said top portion facing the open bottom of said housing, and latch means on said housing for holding said optical support means in operative position.

Claim 4

A luminaire comprising, in combination, a housing comprising a top, a plurality of side walls and an open bottom, one of said side walls being detachably mounted on said housing, electrical operating means mounted on said detachable side wall, an optical assembly in said housing comprising optical support means detachably secured to said housing and lamp holder means secured to said support means, and light transmitting cover means removably closing the open bottom of said housing, said electrical operating means being mounted on the outer side of said detachable side wall, said detachable side wall having hanger means on the inner side thereof, said optical support means comprising a side portion detachably engageable with said hanger means for swinging movement thereon of said support means between an inoperative hanging position and an operative installed position, said optical support means having a top portion spaced below the top of said housing in said operative position, a reflector on said top portion facing the open bottom of said housing, and latch means on said housing for holding said optical support means in operative position.

Claim 5

A luminaire as defined in claim 2, said side portion of said optical support means in said operative position being arranged at an angle to said detachable side wall for defining therewith a compartment therebetween for receiving wire means, said lamp holder means being arranged on the side of said side portion away from said compartment.

Claim 6

A luminaire as defined in claim 2, and thermal barrier means provided between said reflector and said top portion of said optical support means.

Claim 7

A luminaire as defined in claim 4, said thermal barrier means comprising an enclosed space defined by said reflector and said top portion of said optical support means.

Claim 8

A luminaire as defined in claim 5, said thermal barrier means additionally comprising heat-reflectiNg sheet means.

Claim 9

A luminaire comprising, in combination, a housing comprising a top, a plurality of side walls and an open bottom, one of said side walls being detachably mounted on said housing and turnably engaging said housing for movement between an installed position forming a side wall of said housing and a detached position away from said housing, electrical operating means mounted on said detachable side wall, an optical assembly in said housing comprising optical support means detachably secured to said housing, and light transmitting cover means removably closing the open bottom of said housing.

Claim 10

A luminaire comprising, in combination, a housing comprising a top, a plurality of side walls and an open bottom, one of said side walls being detachably mounted on said housing and turnably engaging said housing for movement between an installed position forming a side wall of said housing and a detached position away from said housing, electrical operating means mounted on said detachable side wall, an optical assembly in said housing comprising optical support means detachably secured to said housing, and light transmitting cover means removably closing the open bottom of said housing.

Claim 11

A luminaire as defined in claim 7, said optical assembly including light transmitting shield means secured to said optical support means and spaced above said cover means, and lamp holder means in said housing for holding a lamp spaced above said shield means.

Claim 12

A luminaire comprising, in combination, a housing comprising a top, a plurality of side walls and an open bottom, one of said side walls being detachably mounted on said housing, electrical operating means mounted on said detachable side wall, an optical assembly in said housing comprising optical support means detachably secured to said housing and lamp holder means secured to said support means, and light transmitting cover means removably closing the open bottom of said housing, said electrical operating means being mounted on the outer side of said detachable side wall, said detachable side wall having a bottom portion provided with hinge means turnably engaging said housing for swingable movement of said detachable side wall between an inverted hanging position projecting below said housing for providing access to said electrical operating means and an upright installed position forming a side of said housing with said electrical operating means on the outside thereof.

Claim 13

A luminaire comprising, in combination, a housing comprising a top, a plurality of side walls and an open bottom, one of said side walls being detachably mounted on said housing, electrical operating means mounted on said detachable side wall, an optical assembly in said housing comprising optical support means detachably secured to said housing and lamp holder means secured to said support means, and light transmitting cover means removably closing the open bottom of said housing, said electrical operating means being mounted on the outer side of said detachable side wall, said detachable side wall having a bottom portion provided with hinge means turnably engaging said housing for swingable movement of said detachable side wall between an inverted hanging position projecting below said housing for providing access to said electrical operating means and an upright installed position forming a side of said housing with said electrical operating means on the outside thereof.

Claim 14

A luminaire as defined in claim 9, said housing being formed with first flange means defining the bottom opening thereof and a second flange means defining a wall opening closed by said detachable side wall, said hinge means during said swingable movement of said detachable side wall engaging said first flange means adjacent said second flange means.

Claim 15

A luminaire as defined in claim 10, and projecting means on said housing for retaining said hinge means in position during said swingable movement.

Claim 16

A luminaire as defined in claim 9, said detachable side wall having door means on the inner side thereof for providing access to said electrical operating means from the interior of said housing.

Claim 17

A luminaire comprising, in combination, a housing comprising a top, a plurality of side walls and an open bottom, one of said side walls being detachably mounted on said housing, electrical operating means mounted on said detachable side wall, an optical assembly in said housing comprising optical support means, and a reflector and lamp holder means secured to said optical support means, said optical support means being detachably secured to said housing for movement of said optical assembly as a unit selectively into and out of said housing through the open bottom thereof, and light transmitting cover means removably closing the open bottom of said housing.

Claim 18

A luminaire comprising, in combination, a housing comprising a top, a plurality of side walls and an open bottom, one of said side walls being detachably mounted on said housing, electrical operating means mounted on said detachable side wall, an optical assembly in said housing comprising optical support means, and a reflector and lamp holder means secured to said optical support means, said optical support means being detachably secured to said housing for movement of said optical assembly as a unit selectively into and out of said housing through the open bottom thereof, and light transmitting cover means removably closing the open bottom of said housing.

Claim 19

A luminaire as defined in claim 13, said optical assembly including refractor means secured to said optical support means for arrangement between a lamp adapted to be held by said lamp holder means and said light transmitting cover means.

Claim 20

A luminaire as defined in claim 14, said refractor means being movably secured to said optical support means for movement away from the lamp to provide access thereto from the bottom of said housing.