Molded-insulation electrical box having integral spacer lugs

Claim 1

A MOLDED PLASTIC WIRING BOX ADAPTED FOR MOUNTING IN AN OPENING CONTAINED IN A RELATIVELY THIN SHEET SECURED TO A VERTICAL SUPPORT, COMPRISING AN OPEN-FRONT BODY MOLDED OF INSULATING MATERIAL AND INCLUDING A VERTICAL REAR WALL, OPPOSED HORIZONTAL BOTTOM AND TOP WALLS, OPPOSED VERTICAL SIDE WALLS, AND A PLURALITY OF UNITARY LUGS EXTENDING INTEGRALLY FROM AND NORMAL TO THE EXTERNAL SURFACE OF EACH OF SAID TOP AND BOTTOM WALLS, RESPECTIVELY, EACH OF SAID LUGS HAVING A PLANAR FRONT SURFACE ADJACENT, PARALLEL WITH AND SPACED FROM THE CORRESPONDING FREE FRONT EDGES OF SAID TOP AND BOTTOM WALLS A GIVEN DISTANCE SUBSTANTIALLY EQUAL TO THE THICKNESS OF THE SHEET, ONE OF SAID SIDE WALLS BEING ADAPTED TO CONTIGUOUSLY ENGAGE SAID SUPPORT WHEN THE OPEN FRONT END OF THE BODY IS MOUNTED IN SAID OPENING; A POINTED PROJECTION EXTENDING FROM THE PLANAR FRONT SURFACE OF EACH OF SAID LUGS IN THE DIRECTION OF, AND SPACED FROM THE FREE FRONT EDGE OF, THE CORRESPONDING ONE OF SAID TOP AND BOTTOM WALLS; AND MEANS FOR SECURING SAID BODY TO THE SUPPORT WHEN SAID BODY IS INSERTED INTO THE OPENING FROM THE REAR SIDE OF THE SHEET, WHEREBY THE BODY IS ACCURATELY POSITIONED AND STABILIZED IN THE OPENING BY THE COOPERATION BETWEEN SAID INTEGRAL LUG MEANS AND THE REAR FACE OF THE SHEET PRIOR TO THE SECUREMENT OF THE BOX TO THE SUPPORT.