Refractory wall construction

Claim 1

AN INCLINED CONICAL REFRACTORY WALL COMPRISING BURNED REFRACTORY BRICKS LAID IN CONICAL COURSE, EACH BRICK HAVING A HOT END AND AN COLD END WITH SIDES EXTENDING LONGITUDINALLY BETWEEN THE ENDS, THE HOT END FORMING AN INNER INCLINED CONICAL WALL SURFACE WITH A COLD END BEING SUBSTANTIALLY PARALLEL THERETO, SAID WALL INCLUDING A LOWER COURSE OF BRICKS AND AN UPPER COURSE OF BRICKS RESTING DIRECTLY ON THE LOWER COURSE OF BRICKS, EACH BRICK OF AN UPPER COURSE HAVING AN APERTURE IN THE LOWER SIDE OF THE BRICK AND A METALLIC PROJECTION, THE PROJECTION INCLUDING A TAB EXTENDING DOWNWARDLY FROM THE COLD END OF THE BRICK PERPENDICULAR TO THE LOWER SIDE OF THE BRICK ADAPTED TO ENGAGE AGAINST THE COLD END OF A BRICK OF A LOWER COURSE, A WEB EXTENDING INWARDLY THEREFROM ALONG A RECESS IN THE LOWER SIDE OF THE BRICK TOWARD THE HOT END AND A LEG EXTENDING UPWARDLY FROM THE WEB PARALLEL TO THE TAB AND RESILIENTLY WEDGE INTO THE APERTURE IN THE LOWER SIDE OF THE BRICK.