Frame for drop ceiling construction

Claim 1

A FRAME STRUCTURE FOR SUPPORTING PANELS IN SPACED RELATION TO THE CEILING OF A ROOM HAVING A CEILING EXTENDING BETWEEN A PLURALITY OF VERTICALLY EXTENDING SIDE WALLS, SAID SIDE WALLS HAVING VERTICALLY EXTENDING STUDS TOPPED BY A HORIZONTALLY EXTENDING PLATE, COMPRISING: A PLURALITY OF CORNER BRACKETS OF EQUAL LENGTH EACH ADAPTED TO ABUT THE CEILING AND EACH ADAPTED FOR ATTACHMENT TO A WALL OF THE ROOM, EACH CORNER BRACKET HAVING A HOLE SPACED FROM ITS UPPER END TO BE OPPOSITE THE PLATE AT THE TOP OF THE STUDS WHEN THE BRACKET ABUTS THE CEILING; SIDE RAILS SUPPORTED BY THE CORNER BRACKETS, EACH RAIL BEING CLOSELY ADJACENT A SIDE WALL; AN INTERMEDIATE PANEL SUPPORTING MEMBER EXTENDING BETWEEN AND SUPPORTED BY THE SIDE RAILS AT OPPOSITE SIDES OF THE FRAME, SAID RAILS AND INTERMEDIATE SUPPORTING MEMBER BEING DETACHABLY CONNECTED TOGETHER AND COOPERATING TO SUPPORT PANELS SUBSTANTIALLY IN A COMMON PLANE PARALLEL TO SAID CEILING. AND HANGERS PIVOTALLY CONNECTED TO THE SIDE RAILS AND EACH PROVIDED WITH A HOLE LOCATED OPPOSITE THE PLATE AT THE TOP OF THE STUDS IN THE SIDE WALL WHEN THE HANGERS ABUT THE CEILING AT THEIR UPPER ENDS.