Universal circle ladle brick

Claim 1

A LADLE FOR MOLTEN STEEL COMPRISING A VESSEL DEFINED BY A METAL SHELL HAVING STRAIGHT SIDE WALL PORTIONS MERGING TANGENTIALLY WITH CONICALLY CURVED LENGTHS, A LINING OF REFRACTORY BLOCKS LAID IN SUCCESSIVE COURSES WITHIN SAID SHELL, SOME COURSES BEING BUILT OF A SET OF TWO DIFFERENT FORMS OF BLOCK, THE FIRST FORM OF BLOCK HAVING FLAT PARALLEL TOP AND BOTTOM FACES, OPPOSITE CYLINDRICALLY CURVED ENDS OF EQUAL RADIUS OF CURVATURE BUT RESPECTIVELY CONCAVE AND CONVEX, AND FRONT AND BACK FACES WHICH INTERSECT THE CURVED SURFACES OF THE ENDS, THE BACK FACE BEING LONGER THAN THE FRONT FACE SO THAT A SERIES OF SUCH BLOCKS EXTEND IN A CURVE CONFORMING TO THE CURVATURE OF SAID SHELL, AND THE SECOND FORM OF BLOCK HAVING IDENTICAL FRONT AND BACK FACES CORRSPONDING TO THE LENGTH TO THE BACK FACE OF SAID FACES CORRESPONDING TO THE LENGTH OF THE BACK FACE OF SAID FIRST MENTIONED FORM OF BLOCK, SAID SECOND FORM OF BLOCK HAVING ARCUATE END FACES RESPECTIVELY CONCAVE AND CONVEX, AND THE CENTER OF CURVATURE FORMING THE ARCUATE END FACES OF SAID SECOND FORM OF BLOCK LYING ALONG A CENTER LINE BETWEEN THE FRONT AND BACK FACES OF SAID SECOND FORM OF BLOCK.