Rotary regenerator seal

Claim 1

A PRIMARY SEAL FOR A ROTARY REGENERATOR MATRIX HAVING FACES COOPERATING WITH THE SEAL, ONE FACE DISTORTING AWAY FROM THE SEAL AND THE OTHER FACE DISTORTING TOWARD THE SEAL WHEN THE MATRIX IS HEATED, THE SEAL COMPRISING, IN COMBINATION, A STIFF ELASTIC FIRST SEAL BAR HAVING A SEALING FACE CONFORMING TO THE SAID ONE FACE OF THE MATRIX WHEN THE BAR AND MATRIX ARE COLD, A RIGID SECOND SEAL BAR HAVING A SEALING FACE CONFORMING TO THE SAID OTHER FACE OF THE MATRIX WHEN THE BAR AND MATRIX ARE HOT, AND MEANS RESPONSIVE TO DIFFERENTIAL THERMAL EXPANSION OF THE SEAL BARS FOR DISTORTING THE FIRST SEAL BAR TO CONFORM TO THE DISTORTED CONDITION OF THE SAID ONE FACE OF THE MATRIX WHEN THE MATRIX AND BARS ARE HEATED COMPRISING ARMS RIGID ON THE FIRST SEAL BAR AND ENGAGING THE ENDS OF THE SECOND SEAL BAR CHARACTERIZED BY A SECOND SEAL BAR EMBODYING SECTIONS OF DIVERSE MATERIAL OF DIFFERENT COEFFICIENTS OF THERMAL EXPANSION DISPOSED END-TO-END BETWEEN THE SAID ARMS SO THAT THE EFFECTIVE COEFFICIENT OF THERMAL EXPANSION OF THE SECOND SEAL BAR IS DETERMINED BY THE COEFFICIENTS OF THERMAL EXPANSION AND RELATIVE LENGTHS OF THE SECTIONS.