Device for silencing firearms and cannon

Details Device for silencing firearms and cannon Device for silencing firearms and cannon

1988-03-29

1990-03-13

Jordan, Charles T.

Ordnance

Barrels

Silencers

181223, F41F 1712

Patent

active

049074881

ABSTRACT:
A cylindrical silencer tube is fastened to the muzzle of a firearm or cannon. A quasi-parabolic reflector placed in front of the gun muzzle directs the main discharge gas and sound wave flow rearward to a tuned chamber behind the gun muzzle. The deflected sound waves strike the rear of the chamber and are directed back towards the next oncoming half cycle of sound waves. When the two out of phase waves collide at the entrance of the tuned chamber a cancellation of the noise occurs.
The second section of the silencer is comprised of a series of chambers and semispherically shaped hollow baffles which direct part of the discharge gas and sound waves in a different and longer path from the main discharge gas and sound waves and then cause them to reunite in a chamber. The two out of phase colliding wave forms cancel each other.
The spacing of the semispherical baffles is such that the discharge sound is raised to ultra sound.

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Hecht Zajac, Optics (Fourth Edition), Feb., 1979, page 127.

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