Spiral flow baffle system

Claim 1

AN EXHAUST MUFFLER, COMPRISING: A MUFFLER HOUSING; A PERFORATE EXHAUST PIPE EXTENDING THROUGH SAID HOUSING, THERE BEING AN EXHAUST PASSAGE IN SAID PIPE; A SERIES OF BAFFLE PLATE PAIRS MOUNTED IN SAID PIPE IN SPACED RELATIONSHIP ALONG THE LONGITUDINAL AXIS OF SAID PIPE; THE TWO BAFFLE PLATES OF ALL OF SAID PAIRS BEING LOCATED PREDOMINANTLY ON OPPOSITE SIDES OF A COMMON LONGITUDINAL PLANE THROUGH SAID AXIS, AND BEING ARRANGED TO CROSS ONE ANOTHER SUBSTANTIALLY AT SAID AXIS AND AT OPPOSITE ACUTE ANGLES TO SAID PLANE, SAID CROSSING PLATES HAVING INNER EDGES IN PROXIMITY TO SAID PLANE AND OTHER EDGES SUBSTANTIALLY ADJACENT TO THE INNER SURFACE OF SAID PIPE, EACH BAFFLE PLATE OF A GIVEN PAIR TERMINATING LONGITUDINALLY OF THE PIPE IN AN EXTREMITY WHICH LIES ADJACENT TO THE EXTREMITY OF THAT BAFFLE PLATE OF THE NEXT SUCCEEDING PAIRWHICH IS ON THE OPPOSITE SIDE OF SAID LONGITUDINAL PLANE, SAID CROSSING BAFFLE PLATES AFFORDING TWO UNOBSTRUCTED SPIRAL GAS PASSAGES TURNING ABOUT ONE ANOTHER, AND AFFORDING ALSO A SUCCESSION OF ACOUSTIC REFLECTING, AND FACES DIAGONALLY ACROSS THE CROSS-SECTIONAL AREAS OF SAID PIPE WHICH ARE ON OPPOSITE SIDES OF SAID LONGITUDINAL PLANE, WHEREBY ACOUSTIC WAVES TRAVERSING SAID PIPE ENCOUNTER SAID REFLECTING SURFACES AND ARE THEREBY DIRECTED OUTWARDLY TOWARD THE PERFORATE WALL OF SAID PIPE.