Ball mills

Claim 1

IN A BALL MILL COMPRISING A CYLINDRICAL SHELL AND A CIRCULAR FLAT END SHELL CONNECTED TO AN END OF THE CYLINDRICAL SHELL, A PLURALITY OF FLAT SURFACED LINING BRICKS COVERING THE INNER SURFACE OF SAID END SHELL, THE LINING BRICKS BEING ARRANGED IN PARALLEL ROWS EXTENDING ACROSS THE END SHELL, THE BRICKS OF ADJACENT ROWS BEING STAGGERED RELATIVELY TO EACH OTHER SO THE END JOINTS OF BRICKS IN EACH OF ADJACENT ROWS ARE NON-ALIGNED, THE IMPROVEMENT COMPRISES EACH BRICK OF SAID PARALLEL ROWS BEING PROVIDED WITH AT LEAST TWO GROOVES LOCATED OPPOSITE EACH OTHER ON OPPOSITE SURFACES OF THE BRICK ADJACENT ITS BOTTOM, THE GROOVES IN BRICKS OF ONE ROW FACING AND COOPERATING WITH GROOVES IN BRICKS OF AN ADJACENT ROW TO FORM CONTINUOUS PARALLEL PASSAGEWAYS EXTENDING ENTIRELY ACROSS SAID FLAT END SHELL, A MORTARED REENFORCING ROD EQUAL IN LENGTH WITH EACH SAID PASSAGEWAY EXTENDING CONTINUOUSLY FROM END TO END OF EACH BRICK OF ADJACENT ROWS REENFORCING SUPPORTING AND TYING TOGETHER THE BRICKS OF SAID ADJACENT ROWS INTO A UNITARY STRUCTURE ACROSS THE FLAT END SURFACE OF SAID SHELL, AND ARCUATE LINING BRICKS COVERING SAID CYLINDRICAL SHELL OF SAID MILL INCLUDING BRICKS HAVING END SURFACES BEARING AGAINST SAID FLAT SURFACED BRICKS FORMING THE PERIPHERAL ROD END ANCHORING PORTION OF SAID UNITARY END LINING STRUCTURE THUS TRANSVERSELY RETAINING THE INTERMEDIATE BRICKS OF SAID STRUCTURE BY SAID MORTARED REENFORCING RODS FIRMLY IN POSITION ACROSS SAID END WALL OF SAID SHELL.