Coke oven door with sealing diaphragm

Claim 1

A COKE OVEN DOOR OF THE SELF-SEALING TYPE ADAPTED TO BE EMPLOYED WITH A JAMB FRAME, LOCATED AT AN END OF A HORIZONTAL COKING CHAMBER, HAVING A RECTANGUALR OPENING THERETHROUGH SURROUNDED BY A FLAT SEALING SURFACE, SAID DOOR COMPRISING A RECTANGULAR FRAME SHAPED BORDER MEMBER HAVING THE SHAPED OF THE SEALING SURFACE ON SAID JAMB FRAME AND HAVING AN OPENING DISPOSED THEREIN SURROUNDED BY SAID BORDER MEMBER, A CLAMPING PLATE SPACED FROM SAID BORDER MEMBER AND IN ALIGNMENT WITH SAID OPENING IN SAID BORDER MEMBER TO PARTIALLY CLOSE SAID OPENING,A FLUXIBLE METAL SEALING DIAPHRAGM HAVING ITS PERIPHERALLY OUTER EDGE SECURED TO SAID BORDER MEMBER AND HAVING ITS PERIPHERALLY INNER EDGE SECURED TO SAID CLAMPING PLATE TO PERMIT SAID BORDER MEMBER TO MOVE RELATIVE SAID CLAMPING PLATE AND TO COMPLETE THE CLOSING OG SAID OPENING, A SEALING EDGE ELEMENT SECURED TO SAID BORDER MEMBER AND HAVING PROJECTING FROM THE FACE OF SAID BORDER MEMBER AT THE INNER FACE OF SAID DOOR A RELATIVELY NARROW EDGE PORTION EXTENDING COMPLETELY AROUND SAID DOOR AND ADAPTED TO ENGAGE THE SEALING SURFACE ON A JAMB FRAME THROUGHOUT THE CIRCUMFERENCE OF THE SAID SURFACE, AND MEANS ASSOCIATED WITH SAID BORDER MEMBER AND ADAPTED TO COOPERATE WITH A JAMB FRAME TO EXERT FORCE ON THE BORDER MEMBER SEALING EDGE ON SAID BORDER MEMBER TOWARDS THE SEALING SURFACE ON SAID JAMB FRAME.