Jet engine silencers with pivotal air induction tubes

Claim 1

IN COMBINATION WITH A JET PROPULSION ENGINE ENDING REARWARDLY WITH A CONVERGENT, HOT GAS FLOW DISCHARGE NOZZLE, AND WITH A NACELLE HOUSING SAID ENGINE IN SPACED RELATIONSHIP TO DEFINE THEREWITH A COOL AIR FLOW PASSAGE AND HAVING A DIVERGENT SECTION WHICH EXTENDS REARWARDLY OF SAID NOZZLE TO BOUND OUTWARDLY SAID COOL AIR FLOW AND THE REARWARD PORTION OF SAID NACELLE BEING FREELY SUPPORTED SPACED FROM SAID NOZZLE, A RETRACTABLE NOISE SUPPRESSING DEVICE COMPRISING A PLURALITY OF OPEN-ENDED TUBULAR SILENCER ELEMENTS SPACED REARWARDLY FROM SAID ENGINE NOZZLE AND PIVOTALBLY FITTED ON SAID NACELLE SECTION TO BE ROCKABLE THEREON INTO AN OPERATIVE POSITION WHEREIN SAID ELEMENTS PROJECT INTO THE HOT GAS FLOW DISCHARGED BY SAID NOZZLE WITH AN INNER END OF SAID ELEMENTS BEING POSITIONED INTO SAID HOT GAS FLOW AND WITH AN OUTER END THEREOF BEING IMMERSED INTO SAID COOL AIR FLOW ADJACENT SAID NACELLE SECTION, AND INTO AN INOPERATIVE POSITION WHEREIN SAID ELEMENTS ARE RETRACTED INTO SAID NACELLE AWAY FROM SAID HOT GAS FLOW, AND CONTROLLABLE MEANS OPERATIVELY CONNECTED WITH SAID SILENCER ELEMENTS FOR SIMULTANEOUSLY ROCKING THE SAME SELECTIVELY INTO BOTH OF SAID POSITIONS THEREOF.