Recessed lighting fixture

Claim 1

A RECESSED ELECTRIC FIXTURE ADJUSTABLE FOR VARYING WALL OR CEILING THICKNESSES, COMPRISING A FIXTURE HOUSING HAVING A PAIR OF OPPOSED WALLS AND AN OPEN SIDE PARTIALLY DEFINED BY SAID WALLS, A MOUNTING BRACKET MOUNTED ON EACH OF THE OPPOSED WALLS FOR SLIDABLE ADJUSTING MOVEMENT TOWARD AND FROM THE PLANE OF SAID OPEN SIDE, A PAIR OF SPACED PORTIONS ON EACH BRACKET EACH HAVING A PLURALITY OF APERTURES SPACED THEREALONG IN THE DIRECTION OF SAID MOVEMENT, CORRESPONDING APERTURES IN SAID PORTIONS BEING ALIGNED TRANSVERSELY OF SAID DIRECTION, THE SPACING OF SAID APERTURES ALONG SAID BRACKET PORTIONS CORRESPONDING TO DIFFERENT WALL OR CEILING THICKNESSES, AN ELONGATED RESILIENT LOCKING MEMBER OF UNDULATORY FORM EXTENDING TRANSVERSELY OF SAID DIRECTION WITH END PORTIONS IN OVERLYING RELATION TO THE SPACED BRACKET PORTIONS AND BENT FOR ENGAGEMENT IN SAID APERTURES, A PAIR OF ELONGATED SLOTS IN SAID MEMBER, A PAIR OF FASTENING MEANS EXTENDING THROUGH SAID SLOTS AND SECURING THE MEMBER TO THE ADJACENT WALL, THE RESILIENT MEMBER HAVING THE PORTION INTERMEDIATE THE SLOTS BOWED AWAY FROM THE WALL, WHEREBY FLATTENING PRESSURE ON THE INTERMEDIATE PORTION EFFECTS ROCKING OF THE OUTER PORTIONS ON THE WALL ABOUT THE AREAS CONTAINING THE SLOTS TO RETRACT SAID BENT END PORTIONS FROM THE APERTURES FOR ALLOWING ADJUSTING MOVEMENT OF THE MOUNTING BRACKET, AND RELEASE OF THE INTERMEDIATE PORTION ALLOWS THE RESILIENCE OF THE MEMBER TO BRING THE BENT END PORTIONS INTO ENGAGED POSITION, AND MEANS ON AT LEAST ONE OF SAID HOUSING WALLS AND AT LEAST ONE OF THE BRACKET PORTIONS ASSOCIATED THEREWITH CO-OPERABLE TO INDICATE THE RELATIVE POSITION OF THE BRACKET AND HOUSING.