Multi-part electrical junction box and plug-in accessory

Claim 1

AN ELECTRICAL JUNCTION BOX FOR INSTALLATION IN A BUILDING, SAID BOX COMPRISING A GENERALLY RECTANGULAR OPEN TOP BASE HAVING BOTTOM, SIDE AND END WALLS AND AN OUTWARDLY PROJECTING FLANGE ADJACENT THE UPPER EDGE OF EACH END WALL, A GENERALLY RECTANGULAR BODY OF INSULATING MATERIAL DISPOSED IN SAID BASE, SAID BODY HAVING A BOTTOM WALL PORTION ENGAGING SAID BOTTOM WALL, SIDE WALL PORTIONS AND END WALL PORTIONS PROVIDING AN UPWARDLY OPENING RECESS, A GENERALLY U-SHAPED SHEET METAL CONTACT MEMBER COMPRISING A WEB AND SPACED LEGS, EACH LEG BEING FORMED TO PROVIDE AN INTERMEDIATE PORTION AND A SEPARATE SIDE PORTION, EACH INTERMEDIATE PORTION BEING DISPOSED INWARDLY OF EACH SIDE PORTION, AN INWARDLY PROJECTING CONTACT LUG ON EACH SIDE PORTION, AN OUTWARDLY PROJECTING CONTACT LUG ON EACH INTERMEDIATE PORTION IN ALIGNMENT WITH THE LUG ON SAID SIDE PORTIONS, ONE INTERMEDIATE PORTION BEING LONGER THAN THE OTHER AND TERMINATING IN A CONTACT PRONG, A SHOULDER ON SAID ONE INTERMEDIATE PORTION DISPOSED AT SUBSTANTIALLY THE SAME LEVEL AS THE END OF SAID OTHER INTERMEDIATE PORTION, SAID CONTACT MEMBER BEING DISPOSED IN SAID RECESS, A SECOND GENERALLY U-SHAPED SHEET METAL CONTACT MEMBER COMPRISING A WEB AND SPACED LEGS, EACH OF SAID LAST-NAMED LEGS BEING FORMED TO PROVIDE A SECOND INTERMEDIATE PORTION AND A SECOND SEPARATE SIDE PORTION ON ONE SIDE OF EACH SECOND INTERMEDIATE PORTION, EACH SECOND INTERMEDIATE PORTION BEING DISPOSED INWARDLY OF SAID SECOND SIDE PORTIONS, A SECOND INWARDLY PROJECTING CONTACT LUG ON EACH SECOND SIDE PORTION, A SECOND OUTWARDLY PROJECTING CONTACT LUG ON EACH SECOND INTERMEDIATE PORTION IN ALIGNMENT WITH THE LUGS ON SAID SECOND SIDE PORTIONS, ONE SECOND INTERMEDIATE PORTION BEING LONGER THAN THE OTHER AND TERMINATING IN A SECOND CONTACT PRONG AND A SHOULDER ON SAID ONE SECOND INTERMEDIATE PORTION DISPOSED AT SUBSTANTIALLY THE SAME LEVEL AS THE END OF SAID OTHER SECOND INTERMEDIATE PORTION, SAID SECOND CONTACT MEMBER BEING DISPOSED IN SAID RECESS WITH SAID OTHER SECOND INTERMEDIATE AND SIDE PORTIONS ADJACENT AND SPACED FROM SAID ONE FIRST INTERMEDIATE AND SIDE PORTIONS AND WITH SAID ONE SECOND INTERMEDIATE AND SIDE PORTIONS ADJACENT AND SPACED FROM SAID OTHER FIRST INTERMEDIATE AND SIDE PORTIONS, A COVER OF INSULATING MATERIAL HAVING A TOP WALL, SIDE WALLS AND END WALLS, AN UPSTANDING GENERALLY RECTANGULAR HOLLOW HOUSING INTEGRAL WITH SAID TOP WALL, SAID HOUSING HAVING TOP, SIDE AND END WALLS, SAID TOP AND END WALLS OF SAID HOUSING HAVING SPACED SLOTS THEREIN, MEANS TO SECURE SAID COVER TO SAID BASE WITH SAID PRONGS RECEIVED IN SAID HOUSING ADJACENT SAID SLOTS AND A RESILIENT FASTENING MEMBER DEPENDING FROM SAID BASE FOR ENGAGING AN APERTURE IN A BRACKET TO SECURE SAID JUNCTION BOX THERETO, SAID SHOULDERS ENGAGING THE TOP WALL OF SAID COVER SERVING TO YIELDABLY MAINTAIN SAID COVER SPACED FROM THE FLANGES ON SAID BASE.