Mufflers

Claim 1

A SILENCER HAVING A CONDUIT CONFINED WITHIN AN OUTER SHELL HAVING END WALLS AND FORMING A CENTRAL PASSAGEWAY FOR EXHAUST GASES AND SOUND WAVES THAT EXTENDS FROM ONE END WALL TO ADJACENT THE OTHER END WALL, AN INLET IN SAID ONE END WALL IN DIRECT COMMUNICATION WITH ONE END OF THE CONDUIT, A PARTITIN WALL SUPPORTING THE OTHER END OF SAID CONDUIT AND THROUGH WHICH SAID CONDUIT EXTENDS, SAID PARTITION WALL DIVIDING THE INTERIOR OF THE SHELL OUTSIDE SAID CONDUIT INTO AN ELONGATED EXPANSION CHAMBER AND INTO A COLLECTION CHAMBER, AN EXHAUST FITTING ON SAID OTHER END WALL THROUGH WHICH GASES AND SOUND WAVES ENTERING THE COLLECTION CHAMBER ARE EXHAUSTED, SAID CONDUIT COMPRISING RELATIVELY ADJUSTABLE PARTS TELESCOPED ONE INTO THE OTHER ENDWISE AND EACH HAVING APERTURES IN THEIR TELESCOPED PORTIONS ADAPTED TO BE SELECTIVELY ALIGNED TO PROVIDE A PRE-SELECTED NUMBER OF PASSAGES IN THE CONDUIT WALL AND THROUGH WHICH A PORTION OF THE GASES AND SOUND WAVES MAY ESCAPE, A CYLINDRICAL HOOD WITHIN THE EXPANSION CHAMBER SURROUNDING AT LEAST THE APERTURED AREA OF SAID CONDUIT, SAID HOOD OPENING AT ONE END INTO THE EXPANSION CHAMBER AND DEFINING AN ANNULAR CHAMBER INTO AND THROUGH WHICH SAID ESCAPED GASES AND SOUND WAVES FLOW, AND DEFLECTOR MEANS ADJACENT TO THE OPEN END OF SAID HOOD TO REVERSE THE DIRECTION OF FLOW OF SAID ESCAPED GASES AND SOUND WAVES LEAVING THE ANNULAR CHAMBER AND ENTERING THE EXPANSION CHAMBER, SAID PARTITION BEING APERTURED TO PERMIT THE GASES AND SOUND WAVES IN THE EXPANSION CHAMBER TO FLOW INTO THE COLLECTION CHAMBER.