Abstract: A noise suppressed firearm includes a closed chamber of fixed volume in communication with the barrel bore at a location nearer the breech than the muzzle. The closed chamber communicates with the barrel bore through passage means having a cross-sectional area at least as large as the barrel bore. The passage means communicates with the barrel bore at a location measured from the breech not greater than about 30% of the barrel length.

Abstract: A silencer or noise suppressor for firearms consisting of an elongated body connected to the firearm muzzle into which the expanding gases and projectile are received. The expanding gases are initially received within a chamber and pass through ports defined in a deceleration plate into a chamber communicating with a plurality of baffles arranged in end-to-end relationship. The baffles each include a diverging bore through which the gases may expand, and externally, each baffle includes a spiral vane receiving the expanding and cooling gases. The vanes of adjacent baffles are in communication whereby gas back-pressure within portions of the vanes cause localized gas compression slowing gas expansion and the generation of audible frequencies.

Abstract: An automatic machine pistol is provided, which is not subject to fouling, which is compact and light while incorporating a pneumatic recoil buffer, which resists muzzle climb, and which can be accessed and cleaned without disassembly. The machine pistol is comprised of a reciprocating bolt within a housing of the pistol. The reciprocating bolt is carried within the housing on four rails by eight roller bearings. No sliding contact is made between the bolt and any other portion of the pistol. A portion of the high pressure gas from the barrel is bled through a bleed hole in the barrel block or barrel into a gas port tube which is telescopically inserted into the bolt. The gas port tube delivers the portion of the discharge gas in a forward direction in opposition to the motion on recoil. An upwardly directed nozzle is communicated to the receiving bore within the bolt.

Abstract: A suppressor for reducing the muzzle blast and noise of firearms or like devices. Several specially configured baffles are aligned serially with intervening expansion chambers within a square tubular housing. The housing containing the baffles is aligned axially within a larger round tubular housing and held in place by an encapsulator at each end. The suppressor assembly has an internal axial passage which permits unobstructed passage of projectiles from the firearm during firing. The specially configured baffles are made of heat absorbent and heat conductive material. The serially disposed baffles shear propellant gases at differing angles forcing them away from the bullet path through openings or ports into the outer housing.

Abstract: A gun silencer and muzzle protector utilizes a hollow housing mounted on a gun barrel with expandable release doors being positioned within the housing. The release doors are pivotally mounted within the housing and are normally retained together in a cone-shaped abutting relationship through the use of a circumferentially extending spring positioned about the doors. A lining employed in the housing silences a gunshot and several different types of adapters may be utilized to mount the housing and associated doors to the gun barrel. The adapters include a first type which is threadably attachable to a gun barrel, a second type which utilizes a split sleeve construction to clamp the adapter to a gun barrel, and a third type which utilizes a radially extending clamp member to clamp the adapter to the gun barrel with the third type of adapter being used in conjunction with any type and caliber of gun.

Abstract: A silencer and flash suppressor for sabot projectiles, which includes an accumulation chamber having a projectile entrance surrounding and closed by the gun barrel and a projectile exit which is spaced from the projectile entrance by a distance less than the projectile length. The projectile exit is the smallest diameter of an exit cone which is surrounded by an annular portion of the accumulation chamber, which portion may include one or more perforated baffles.

Abstract: A noise suppressor and stabilizer for a firearm having a number of fluidic scillator laminates each having a number of fluidic pressure controlled oscillators disposed thereon stacked and attached to the muzzle end of a firearm. The pressure controlled oscillators exhaust part of the propellant gases at a frequency either above the range of detection by the human ear or at a less sensitive region of hearing thus lowering the characteristic muzzle blast heard as the bullet exits the muzzle of the firearm. Additional laminates having the pressure controlled oscillators asymmetrically placed are provided to compensate for muzzle climb. Twist of the firearm is controlled by the placement of one or more twist compensating laminates within the stack. One embodiment of the invention provides for laminates of different internal dimensions forms expansion chambers within the noise suppressor.

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.

Abstract: A noise and recoil suppressor apparatus for high powered rifles includes a tubular body with an inner central cylindrical bore and an outer cylindrical surface. A butt end portion of the tubular body is adapted for attachment to the muzzle end portion of a high powered rifle and the body provides an opposite tip portion. An annular rib extends outwardly from the outer cylindrical surface and is positioned adjacent the butt end portion of the tubular body. A plurality of space apart latterally extending cylindrical openings extends between the bore and the outer surface of the tubular body, the first plurality of openings being spaced along the tubular body beginning at the tip portion and terminating at the annular rib. A second plurality of openings extends at an acute angle with respect to the bore axis between the bore and the outer cylindrical surface adjacent the annular rib. The second plurality of openings are positioned generally between the annular rib and the first plurality of openings.

Abstract: A hesitation blowback toggle action weapon in which an under-center toggle employing interconnected toggle links recedes and redirects the recoil energy directed against the face of the bolt generated at the time of firing into the handle of the weapon, and in so doing either:1. Avoids the full auto sear as long as the trigger is pressured so that movement of the bolt and linkage of the weapon will continue until the ammunition of the magazine is spent, or2. Engages a semi automatic sear pivotally associated with the trigger of the weapon to lock the weapon in toggle collapsed position until the trigger is sequentially released to unseat sear from the trigger, and then again pressured to release the sear from the toggle mechanism, thus firing another single round.

Abstract: A transportable seismic energy source having a baseplate for contacting the earth, an upper master cylinder affixed at its lower end to the base plate and extending uprightly from it, a receiving cylinder of outside diameter less than the internal diameter of the master cylinder and supported coaxially within the upper portion of the master cylinder, the master cylinder and receiving cylinder being filled with liquid, a slug firing gun mounted to the master cylinder and arranged so that the gun muzzle extends coaxially and above the receiving cylinder.

Abstract: The present gun silencer includes an internal cardioid-shaped cavity which utilizes the principles of wave mechanics to attenuate the sound of a gun firing without contacting the projectile. The shock wave from a firing is totally internally reflected thereby confining and attenuating the sound from a gun firing. The silencer cavity is shaped in a manner guiding and concentrating shock waves from a gun firing to an exit port at which sound-absorbing material is present.

Abstract: A muzzle stabilization arrangement for a rifle (10) with a barrel (14) includes a muzzle stabilizer (18) mounted on the front end of the barrel and having a transverse opening (80) partially defined by a surface (84) upon which propellant gases from the muzzle may impinge during firing to hold the muzzle down. Gas ports (38, 40) in the barrel supply propellant gas to orifices (62, 64) in the stabilizer which direct a gas screen over the opening to prevent excessive noise.

Abstract: A sound suppressor for a firearm, including a hollow cylindrical casing having an entrance end and an exit end; and at least one disc-shaped baffle element coaxially mounted within the casing and between the ends. The element has front and rear faces with an annular area therebetween and at least one opening in its rear face. A centrally apertured entrance end plug is attached to the entrance end of the casing and is mountable to the muzzle of a firearm. A centrally apertured exit end plug is attached to the exit end of the casing. The baffle element has a primary opening therethrough with at least one slanted sidewall and at least one secondary opening arranged between the annular area and the slanted sidewall.

Abstract: A silencer for the barrel of a firearm comprises a sheath defining an interior space having open opposite ends. The sheath has a longitudinal axis. A plurality of partitioned plates are connected to the sheath and extend across the interior space thereof. Each partition plate has an opening therethrough of a size which is wider than a caliber of the firearm barrel and which lies in a plane which is inclined at an acute angle with respect to the axis. Each partition plate, in a direction along the axis, is rotated around the axis by a selected angle with respect to a previous partition plate to produce a convoluted path for gases discharged from the gun barrel. The first partition plate in the sheath adjacent a firearm valve which is connected to one open end of the sheath, defines an initial expansion chamber for the gases.

Abstract: A small arm having a barrel (11) with at least one transverse bore (14) and a detachable silencer (62) including an expansion chamber (58) communicating with the transverse bore, comprising selectively operable closure means (34) arranged in the path of the combustion gases between the interior of the barrel and the expansion chamber is characterized by an arrangement in which the closure means (34) is prevented from opening or remaining in the open position when the silencer (62) is not in place. Thus, any risk of injury to the shooter is excluded.

Abstract: A cylindrical silencer tube is fastened to the muzzle of a firearm. The interior of the tube is equipped with a series of chambers and conically shaped baffles which direct part of the discharge gases and sound waves in a different path from the main discharge and then causes them to reunite before they discharge the silencer at a point where part of the sound waves have been delayed and are hence out of phase with the principal waves and cause elimination of the noise. Specially constructed inlet and outlet chambers within the tube aid in the suppression of the sound waves and deafening of the noise. The exterior of the cylindrical silencer tube is equipped with a series of cooling fins to aid in the dissipation of heat from the silencer.

Abstract: A suppressor for reducing the muzzle blast of firearms or the like. Several separate absorbent elements are aligned in tandem within a tubular housing, and adjacent absorbent elements are separated by triangular baffles which expose end portions of adjacent absorbent elements. These exposed end surface portions enhance dispersion of propellant gases into and through the absorbent elements. The absorbent elements preferably are made of a knitted ferrous or non-ferrous wire mesh, providing a number of tortuous paths for gas dispersion into the absorbent elements and lowering the temperature of the gases to reduce the noise of the muzzle blast.

Abstract: A cam operated attaching device for quickly attaching and removing a sound suppressor to a gun barrel, comprising a segmented collet with lugs on the internal side of the segment tips which engage circular grooves in the outer periphery of a nipple fastened to the gun barrel end.

Abstract: The invention relates to a hand-held firearm comprising a muzzle silencer (9) and a barrel (11) which is provided with transverse bores and is surrounded by an expansion area (15) into which the transverse bores extend. The transverse bores (14) enable the muzzle velocity of the bullets to be less than Mach 1, in spite of the use of conventional ammunition, and there is consequently no supersonic boom of the bullet. To selectively eliminate the reduction in firing energy involved therein and be able to shoot with maximum firing force, the transverse bores (14) are selectively closable by a locking device (16) which is preferably in the form of a sleeve (16) which surrounds the barrel (11) and is mounted for rotation thereon and is furthermore provided with an actuating member (21) for setting the open or closed position.

Abstract: A trigger device for an automatic gun provided with a connector piece which serves to engage a hammer with a sear and also is interlocked with a trigger to slide forward on a trigger guard inside a receiver in such a way as to disengage the hammer from the sear in direct response to the backward and forward movement of a breech block.

Abstract: In the embodiment of the invention described in the specification, a shotgun includes a trigger housing having a rotatably mounted hammer, a pivotally mounted trigger and a slidably and rotatably mounted disconnect member. The disconnect member links the trigger and the hammer in the cocked position, but is disconnected from the trigger when the hammer is released.

Abstract: A disconnector for the trigger mechanism of a repeating firearm, in which the trigger must be disconnected from the sear during the reloading cycle so that the sear can re-engage and cock the firing member even though the trigger is still retracted when the reloading cycle is complete. The disconnector is directly engaged by a portion of the reciprocating breech-bolt mechanism in order to disconnect the sear, rendering the trigger inoperative until it is released by the shooter.

Abstract: A gas-operated, magazine fed firearm includes a shell carrier for receiving shells from the magazine and lifting them into chambering position. An integral shell stop and carrier latch lever pivotally mounted in the receiver latches the shell carrier in its lowered, shell-receiving position and releases a single shell from the magazine to be moved onto the shell carrier by the magazine spring. The shell stop lever blocks the following shell from moving onto the shell carrier and releases the shell carrier for transferring the shell to chambering position. The shell stop lever shifts laterally to permit shells to be loaded past the carrier into the magazine from the feeding end.