Brick with comolded internal plates

Claim 1

A BASIC REFRACTORY BRICK COMPRISING A BODY CONSISTING SUBSTANTIALLY OF BASIC REFRACTORY MATERIAL CONTAINING MAGNESIA, SAID BRICK BEING GENERALLY OF RECTANGULAR FORM AND HAVING FOUR LATERAL FACES AND TWO END FACES, OXIDIZABLE METALLIC EXTERNAL PLATES EXTENDING OVER THE BULK OF SAID FOUR LATERAL FACES OF THE BRICK, AN OXIDIZABLE FERROUS METALLIC INTERNAL SEPARATOR PLATE EXTENDING LONGITUDINALLY OF THE BRICK AND DIVIDING THE BRICK INTO SEPARATE COMPARTMENTS, OXIDIZABLE FERROUS METALLIC U-SHAPED INTERNAL PLATES IN THE BODY OF THE BRICK, MEANS SECURING THE BASES OF THE SAID U-SHAPED INTERNAL PLATES TO THE SEPARATOR PLATE, WHEREIN SAID INTERNAL PLATES ARE DISPOSED SO THAT EACH LATERAL FACE OF THE BRICK HAS AT LEAST ONE INTERNAL PLATE DISPOSED TRANSVERSE TO SAID LATERAL FACE, AND EACH OF TWO OPPOSITE LATERAL FACES OF THE BRICK HAVE TWO INTERNAL PLATES DISPOSED TRANSVERSE TO SAID OPPOSITE LATERAL FACES, SAID INTERNAL SEPARATOR PLATE AND SAID U-SHAPED INTERNAL PLATES BEING IN COMOLDED RELATIONSHIP WITH SAID BODY, THERE BEING REFRACTORY BETWEEN SAID INTERNAL PLATES AND SAID EXTERNAL PLATES, SAID INTERNAL PLATES DIVIDING THE BODY INTO AT LEAST SIX REFRACTORY CELLS, AND ON OXIDATION OF SAID INTERNAL PLATES AND REACTION WITH SAID BASIC REFRACTORY, EACH OF SAID CELLS NEAR ONE END OF THE BRICK AFTER EXPOSURE TO ELEVATED TEMPERATURE HAVING AREAS OF REACTION BETWEEN THE METAL OF THE PLATE AND THE REFRACTORY ALONG AT LEAST TWO ADJOINING SIDES OF SAID CELLS.