Refractory unit for furnace-lining construction

Claim 1

A REFRACTORY FURNACE-LINING UNIT FOR CURVED CONSTRUCTION COMPRISING A SOLID REFRACTORY BODY PORTION HAVING A LARGER END, A SMALLER END, TWO OPPOSITING SUBSTANTIALLY PARALLEL TRAPEZOIDAL FLAT SIDES AND TWO OPPOSING SUBSTANTIALLY RECTANGULAR FLAT SIDES, AN OXIDIZABLE METAL PLATE SUPERIMPOSED UPON AND ADHESIVELY SECURED TO A RECTANGULAR SIDE AND AN OXIDIZABLE METAL PLATE SUPERIMPOSED UPON AND ADHESIVELY SECURED TO A TRAPEZOIDAL SIDE OF SAID BODY PORTION SO AS TO PROJECT OUTWARDLY THEREFROM, EACH OF SAID PLATES BEING SUBSTANTIALLY COEXTENSIVE WITH BUT TERMINATING JUST SHORT OF THE EDGES OF THE SIDE OF THE BODY PORTION TO WHICH IT ADHERES EACH OF SAID METAL PLATES HAVING CORRUGATIONS EXTENDING FROM ITS OWN EDGE ADJACENT THE SMALLER END OF SAID REFRACTORY BODY PORTION TOWARD ITS OPPOSITE EDGE, THE CORRUGATIONS IN SAID PLATE ADHERING TO A TRAPEZOIDAL SIDE BEING OF SUBSTANTIALLY CONSTANT MAGNITUDE MEASURED IN A PLANE NORMAL TO THE PLANE INCLUDING SAID PLATE, AND THE CORRUGATIONS IN SAID PLATE ADHERING TO A RECTANGULAR SIDE BEING OF GREATEST MAGNITUDE, MEASURED IN A PLANE NORMAL TO THE PLANE INCLUDING SAID PLATE, ADJACENT THE SMALLER END OF SAID BODY PORTION AND GRADUALLY AND PROGRESSIVELY DECREASING IN MAGNITUDE WITH DISTANCE TOWARD THE LARGER END OF SAID BODY PORTION, SAID CORRUGATIONS BEING DISPOSED SUBSTANTIALLY NORMAL TO THE ENDS OF SAID BODY PORTION AND PRESENTING RELATIVELY FLAT RAISED SURFACES, THE REMAINDER OF SAID PLATES BEING SUBSTANTIALLY FLAT AND BEING IN SURFACE CONTACT WITH THE FLAT SIDES OF SAID BODY PORTION.