Door frame

Claim 1

A METALLIC DOOR FRAME FOR FITMENT INTO A PREFORMED OPENING IN A FINISHED WALL STRUCTURE, COMPRISING SPACED APART PARALLEL JAMBS THAT ARE CONNECTED TOGETHER BY A HEADER, THE JAMBS AND THE HEADER EACH BEING FORMED OF SHEET METAL HAVING AN INNER DISPOSED FACE, SAID FACE BEING PROVIDED WITH A CHANNEL FORMING A STOP FOR A DOOR, THE JAMBS AND THE HEADER OUTWARDLY FROM THE FACE BEING RABBETED AND THEN SHAPED TO PROVIDE OUTWARDLY FLARING ARCUATE WALLS, THE WALLS TERMINATING IN A PAIR OF OPPOSED FLANGES FORMING A THROAT OPENING, THE JAMBS AND THE HEADER ADAPTED TO EMBRACE THE FINISHED WALL STRUCTURE BY SHIFTING THE FLANGES OVER THE WALL AREA AND WITH THE WALL EXTENDING INTO THE JAMBS AND THE HEADER THROUGH THE THROAT OPENING, THE JAMBS AT THEIR UPPER ENDS AND THE HEADER AT ITS OUTER ENDS BEING NOTCHED AND BEVELED FOR FITMENT TOGETHER AT ASSEMBLY AND WITH THE ARCUATE SIDE WALLS HAVING A MATING ENGAGEMENT AT THE CORNERS WHEREBY TO FORM A COPE JOINT, MEANS CARRIED BY THE OPPOSED FLANGES OF THE HEADER AND SPACED FROM THE ARCUATE WALLS TO FORM AN OPENING FOR A WEDGE EXTENSION ON THE JAMBS AT THEIR UPPER ENDS WHEREBY THE WEDGE ENGAGEMENT CAUSES THE COPE JOINT TO BE IN FLUSH SMOOTH RELATION, A PRESSURE DEVICE CARRIED WITHIN THE JAMBS ADJACENT THEIR UPPER ENDS AND ADAPTED TO BEAR AGAINST A WALL CORE TO BIAS THE JAMBS OUTWARDLY TO CAUSE THE JAMBS AND THE HEADER TO HAVE PRESSURE ENGAGEMENT, STOP LUGS CARRIED BY THE UPPER PORTION OF THE JAMBS THAT LIE IN THE PATH OF UPWARD MOVEMENT OF THE HEADER, THE PRESSURE DEVICE FORCING THE JAMBS INTO THE INTERLOCKING ENGAGEMENT WITH THE HEADER FOR CREATING THE COVE JOINT, MEANS FOR ANCHORING ONE JAMB AT APPROXIMATE VERTICAL CENTER TO A WALL CORE ADJACENT TO THE JAMB COMPRISING AN ELONGATED SCREW HAVING A SHANK PORTION AND AS THREADED PORTION, THE SCREW BEING CIRCUMFERENTIALLY GROOVED AT A POINT BETWEEN THE FIRST THREAD AND THE SHANK, THE SHANK HAVING A HEAD REMOTE FROM THE THREADED PORTION WHEREBY THE SCREW MAY BE ROTATED, AN EXPANDABLE SLEEVE ADAPTED TO RECEIVE THE SHANK OF THE SCREW, THE SLEEVE HAVING AN INWARDLY DIRECTED BEVEL AT ONE END FOR SEATING WITHIN THE GROOVE ON THE SCREW, THE SLEEVE BEING SO DESIGNED AS TO PERMIT THE SLEEVE TO CONTACT FOR FITMENT WITHIN AN OPENING FORMED IN THE STOP, THE SLEEVE HAVING SELF-RETAINING MEANS FOR HOLDING IT WITHIN THE JAMB, THE SLEEVE HAVING AN ENLARGED RECESSED COLLAR AT THE OPPOSITE END THEREOF TO RECEIVE THE SCREW HEAD WHEREBY THE SLEEVE MAY BE FORCED THROUGH THE APERTURE TO SNAP OUTWARDLY TO PREVENT SUBSEQUENT REMOVAL THEREOF, THE SCREW EXTENDING THROUGH THE SLEEVE AND ENGAGEABLE WITH A WALL CORE WHEREBY THE JAMB MAY BE POSITIVELY HELD IN ITS SPACED RELATION WITH RESPECT TO THE STUD AGAINST TWISTING OR UNAUTHORIZED SPRINGING OF THE JAMB AT A POINT OF THE LATCH FOR THE DOOR.