Heating chamber walls, particularly the backwalls of furnaces, such as siemens-martin furnaces

Claim 1

HEATING CHAMBER WALLS, PARTICULARLY FOR THE BACKWALLS OF INDUSTRIAL FURNACES, SUCH AS SIEMENS-MARTIN FURNACES, COMPRISING AN OUTER WALL OF MASSIVELY LINED BEAMS, AN INNER WALL BORDERING THE HEATING CHAMBER SPACED FROM SAID OUTER WALL, A FRAMEWORK FOR SAID INNER WALL COMPRISING SPACED VERTICAL WALL COLUMNS, A PLURALITY OF HORIZONTAL BEAMS, SAID BEAMS BRIDGING THE AREA BETWEEN TWO ADJACENT WALL COLUMNS, MEANS SLIDINGLY MOUNTING SAID BEAMS FOR VERTICAL MOVEMENT ON SAID COLUMNS, ROWS OF FIRE BRICKS, EACH BRICK HAVING A RECESS INTO WHICH A HORIZONTAL BEAM EXTENDS IN ORDER TO SUPPORT A ROW OF SAID FIRE BRICKS, COOLING MEANS FOR SAID INNER WALL BETWEEN SAID OUTER AND INNER WALL, SAID HORIZONTAL BEAMS EACH SUPPORTING TWO ADJACENT ROWS OF BRICKS WHEREBY EACH BEAM MAY SIMULTANEOUSLY HOLD AND VERTICALLY MOVE THE BRICKS OF TWO CONSECUTIVE BRICK ROWS.