Refractory liner anchorage

Claim 1

IN A ROTARY KILN: A CYLINDRICAL SHELL; A REFRACTORY LINING ON THE INNER SURFACE OF THE SHELL, SAID LINING INCLUDING A PLURALITY OF COURSES IN SIDE-BY-SIDE RELATIONSHIP, EACH COURSE INCLUDING A NUMBER OF CIRCUMFERENTIALLY ALIGNED PAIRS OF SPACED, OPPOSED TAPERED EACH BRICK HAVING A PAIR OF SPACED, OPPOSED TRAPERED FACES COOPERATING WITH THE PROXIMAL TAPERED FACES OF ADJACENT BRICKS, WHEREBY THE BRICKS ARE RETAINED IN PLACE IN THE CORRESPONDING COURSES BEFORE THE BRICKS BECOME WORN, ONE OF THE TAPERED FACES OF EACH BRICK HAVING A GROOVE FORMED THEREIN, THE GROOVES IN THE BRICKS OF EACH PAIR BEING IN ALIGNMENT TO PRESENT A KEYWAR; A PIN FITTED LOOSELY WITHIN SAID KEYWAR TO INTERLOCK THE BRICKS OF THE CORRESPONDING PAIR, EACH GROOVE HAVING A CENTRAL GENERALLY FLAT PORTION OF A WIDTH GREATER THAN A FIRST DIMENSION OF THE PIN AND A PAIR OF SIDE PORTIONS OF A DEPTH LESS THANA SECOND DIMENSION OF THE PIN, WHEREBY ONE OF THE BRICKS MAY SHIFT RELATIVE TO THE OTHER BRICK ALONG THE PROXIMAL TAPERED FACE THEREOF IN OPPOSED DIRECTIONS TRANSVERSELY OF SAID PIN, AND PORTIONS OF SAID PIN WILL BE DISPOSED IN BOTH OF SAID GROOVES TO LIMIT THE TRAVEL OF SAID ONE BRICK RELATIVE TO THE OTHER BRICK TO A PREDETERMINED DISTANCE, SAID PIN BEING MOVABLE ALONG SAID CENTRAL, GENERALLY FLAT PORTION OF THE GROOVE AS THE SHIFTING OF THE BRICKS OCCURS.