Means for supporting electrical fixtures

Claim 1

AN ADJUSTABLE BAR HANGER FOR SUPPORTING AN OUTLET BOX OR THE LIKE COMPRISING, INNER AND OUTER LONGITUDINAL SLIDE MEANS EQUIPPED FOR MATED TELESCOPIC SLIDING RELATIONSHIP, SAID ASSEMBLED SLIDES HAVING MOUNTING FLANGES AT THE OPPOSITE ENDS THEREOF FOR REGISTER WITH SUPPORTING MEANS FOR SUSPENDING SAID BAR HANGER THEREBETWEEN, CLAMPING MEANS FOR HOLDING THE OUTLET BOX AGAINST SAID BAR HANGER, THE OUTLET BOX HAVING A WALL PROVIDED WITH A KNOCK-OUT HOLE OF SELECTED SIZE AND WHEREIN THE OUTSIDE SURFACE OF SAID BOX WALL IS TO BE CLAMPED AGAINST SAID BAR HANGER, SAID CLAMPING MEANS INCLUDING A CARRIER HAVING A PAIR OF PARALLEL SPACED LOOP WALLS MOUNTED OVER SAID MATED MEMBERS WHEREIN SAID CARRIER MAY BE SUPPORTED AT SELECTED POSITIONS ALONG THE LONGITUDINAL AXIS OF SAID BAR HANGER, THE LOWER PORTION OF SAID CARRIER EXTENDING THROUGH SAID BOX KNOCK-OUT HOLE AND BELOW THE INSIDE SURFACE OF SAID BOX WALL, ADJUSTABLE MEANS DEPENDING VERTICALLY FROM THE LOWER PORTION OF SAID CARRIER, A CLAMPING SADDLE MOUNTED OVER SAID ADJUSTABLE MEANS AND HAVING A PAIR OF OPPOSED UPSTANDING WALL PORTIONS EXTENDING THROUGH SAID KNOCK-OUT AND ABOVE SAID BOX WALL OUTSIDE SURFACE, SAID PORTIONS EXTENDING BETWEEN SAID PARALLEL LOOP WALLS OF SAID CARRIER, SAID WALL PORTIONS EXTENDING THROUGH SAID KNOCK-OUT HOLE IN A RELATIVELY FREE RELATIONSHIP PRIOR TO CLAMPING SAID BOX TO SAID HANGER, A LATERAL SHOULDER ON THE OPPOSITE SIDES OF EACH WALL PORTION AND INTEGRAL THEREWITH AND CAMMING MEANS ON SAID CARRIER AND CONFRONTING SAID SHOULDERS TO SPREAD SAME AND THE ADJACENT PORTIONS THEREWITH FURTHER APART UPON FORCING SAID SADDLE UPWARDLY ALONG THE VERTICAL, ACTUATION OF SAID ADJUSTABLE MEANS FORCES SAID SADDLE UPWARD ALONG SAID VERTICAL AND AGAINST SAID CAMMING MEANS WHEREIN SAID LOOP WALLS ARE DRAWN IN CLAMPED RELATIONSHIP AGAINST ONE OF SAID SLIDE MEANS AND SAID PORTIONS SPREAD OUT TO REGISTER AGAINST OPPOSITE EDGE PORTIONS OF SAID KNOCK-OUT HOLE AS SAID SHOULDERS BITE INTO THE INSIDE SURFACE OF SAID BOX WALL SURROUNDING SAID KNOCK-OUT, WHEREBY SAID BOX IS CLAMPED AGAINST THE OTHER OF SAID SLIDE MEANS.