Jet engine noise suppression system

Claim 2

In a jet engine noise suppressor for receiving and reducing the noise of exhaust gases discharged from the tail pipe of the engine, a tubular noise suppressor shell for conducting the exhaust gases discharged from said tail pipe, a housing structure at the anterior end of said shell including an apertured front wall and seal means movable thereon and supported therefrom for receiving and closing about said tail pipe and forming a seal with said tail pipe, said housing structure confining the exhaust gases on their way from said tail pipe to said anterior end of said shell, said seal means comprising a pair of seal members arranged to move relative to said front wall and to close on said tail pipe by relative movement toward one another, and spring loading means for yieldingly supporting said seal members with accommodation for vertical movement of the tail pipe at different power settings of the jet engine.

Claim 3

In a jet engine noise suppressor for receiving and reducing the noise of exhaust gases discharged from the tail pipe of the engine, a tubular noise suppressor shell for conducting the exhaust gases discharged from said tail pipe, a housing structure at the anterior end of said shell including an apertured front wall and seal means movable thereon and supported therefrom for receiving and closing about said tail pipe and forming a seal with said tail pipe, said housing structure confining the exhaust gases on their way from said tail pipe to said anterior end of said shell, said seal means comprising a pair of seal members arranged to move relative to said front wall and to close on said tail pipe by relative movement toward one another, and spring loading means for yieldingly supporting said seal members with accommodation for vertical movement of the tail pipe at different power settings of the jet engine.

Claim 4

In a jet engine noise suppressor for receiving and reducing the noise of exhaust gases discharged from the tail pipe of the engine, a tubular noise suppressor shell for conducting the exhaust gases discharged from said tail pipe, a housing structure at the anterior end of said shell including an apertured front wall and seal means movable thereon and supported therefrom for receiving and closing about said tail pipe and forming a seal with said tail pipe, said housing structure confining the exhaust gases on their way from said tail pipe to said anterior end of said shell, said seal means comprising a pair of seal members arranged to move relative to said front wall and to close on said tail pipe by relative movement toward one another, and spring loading means for yieldingly supporting said seal members with accommodation for vertical movement of the tail pipe at different power settings of the jet engine.

Claim 5

The subject matter of claim 1, wherein said seal members are movable vertically to close on the tail pipe, and said spring loading means act vertically on said seal members.

Claim 6

In a jet engine noise suppressor for receiving and reducing the noise of exhaust gases discharged from the tail pipe of the engine, a tubular noise suppressor shell for conducting the exhaust gases discharged from said tail pipe, a housing structure at the anterior end of said shell including an apertured front wall and movable seal means thereon and supported therefrom for receiving and closing about said tail pipe and forming a seal with said tail pipe, said housing structure confining the exhaust gases on their way from said tail pipe to said anterior end of said shell, means forming a secondary air entrance passage open at one end to the atmosphere and discharging at the other in a region to become added to the hot exhaust gases passing from said tail pipe to said anterior end of said shell, and concentric annularly spaced augmenter tubes located in the anterior end of said shell for receiving and passing the hot exhaust gases from said tail pipe into said anterior end of said shell in two divided columns and for receiving said secondary air from said passage to mix with the two columns of said gas, one of said augmenter tubes being adjustable longitudinally relative to the other.

Claim 7

In a jet engine noise suppressor for receiving and reducing the noise of exhaust gases discharged from the tail pipe of the engine, a tubular noise suppressor shell for conducting the exhaust gases discharged from said tail pipe, a housing structure at the anterior end of said shell including an apertured front wall and movable seal means thereon and supported therefrom for receiving and closing about said tail pipe and forming a seal with said tail pipe, said housing structure confining the exhaust gases on their way from said tail pipe to said anterior end of said shell, means forming a secondary air entrance passage open at one end to the atmosphere and discharging at the other in a region to become added to the hot exhaust gases passing from said tail pipe to said anterior end of said shell, and concentric annularly spaced augmenter tubes located in the anterior end of said shell for receiving and passing the hot exhaust gases from said tail pipe into said anterior end of said shell in two divided columns and for receiving said secondary air from said passage to mix with the two columns of said gas, one of said augmenter tubes being adjustable longitudinally relative to the other.

Claim 8

In a jet engine noise suppressor for receiving and reducing the nose of exhaust gases discharged from the tail pipe of the engine, a tubular noise suppressor shell for conducting exhaust gases discharged from said tail pipe, an augmenter tube extending axially into the anterior end portion of said shell for receiving and passing hot exhaust gases from said tail pipe inside thereof, the anterior end portion of said tube and shell being annularly spaced from one another to form an annular secondary air intake port which opens into said gas passageway, and means supporting said augmenter tube for axial movement longitudinally of said shell.

Claim 9

In a jet engine noise suppressor for receiving and reducing the nose of exhaust gases discharged from the tail pipe of the engine, a tubular noise suppressor shell for conducting exhaust gases discharged from said tail pipe, an augmenter tube extending axially into the anterior end portion of said shell for receiving and passing hot exhaust gases from said tail pipe inside thereof, the anterior end portion of said tube and shell being annularly spaced from one another to form an annular secondary air intake port which opens into said gas passageway, and means supporting said augmenter tube for axial movement longitudinally of said shell.