Abstract: A nozzle comprises: a set of first flaps articulated to a rigid structure, and forming a convergent; a set of second flaps each articulated to a corresponding first flap, and forming a divergent; a set of third flaps each of which is connected at a position between two adjacent second flaps and which is, on the one hand, articulated to the rigid structure and, on the other hand, linked to each of the two adjacent second flaps by carrier linked to the aforesaid third flap by a ball joint.

Abstract: The present invention relates to an improved retaining and release mechanism for the magazines of automatic and/or semi-automatic firearms, in particular to a type of magazine which is provided with a lateral securing slot. A tooth (52) of lever (54) is designed to engage lateral securing slot (34) of magazine (30). Said lever (54) is provided with a deflecting surface (55) which abuts to a pair of deflecting edges (57a,57b) of protective ears (56a,56b). Said lever (54) is pivotally connected to said protective ears (56a,56b) of a base (38) by means of a pin (58). A slide (62) is connected to a "T" shaped guide (60), of said lever (54), by means of a "T" shaped channel (64). Said lever (54) is urged towards a body (16) of the firearm by energy exerted through a plunger (82) from a plunger spring (80) contained within said shaft (36).

Abstract: A firearm which alloys center fire cartridges, rim fire cartridges of different sizes and types, as well as, black powder loads of different sizes to be fired from the same firearm. The aforestated is accomplished by the present invention entailing three firing pins which are selectively controlled by setting the triple mode selector located on the hammer to the desired setting. The aforementioned firearm has an internal firing mechanism lock which locks the internal firing mechanism and renders the firing mechanism inoperative. The internal firing mechanism lock is actuated by a key which can easily be carried on one's person.

Abstract: The invention relates to an explosion-proof mat for protecting structures that enclose occupant accommodations in vehicles. The mat has several layers of textile impact-resistant sheet saturated with impregnating material and conforming to the shape of the accommodation-enclosing structure. The impregnating material is flexible after curing. A rigid sheet of composite is embedded between two inner layers of the textile sheets.

Abstract: A longitudinally central portion of a weaponry support plank is secured to the cabin area floor of a McDonnell Douglas 500/530 helicopter using a support and reinforcing system associated with forwardly and rearwardly disposed pairs of stiffening ribs anchored to the top side of the floor. Opposite end portions of the front and rear rib pairs are removed and are laterally enclosed in and anchored to elongated reinforcing structures each having opposite ends generally aligned with the opposite ends of its associated shortened rib. End members are anchored to the floor at the opposite ends of each pair of shortened ribs and are also anchored to the opposite ends of their associated reinforcing structure. Two front support strut members have upper sides fixedly secured in a spaced relationship to a front side edge of the central plank portion, and two rear support strut members have sides fixedly secured in a spaced relationship to the rear side edge of the central plank portion.

Abstract: A lock-up device for a firearm which utilizes a ball and cam arrangement to interlock two members. The interlocked members include ball engagement surfaces which are curved so that a substantial portion of the ball surface is in contact with the engagement surfaces. The lock-up device disposed in a firearm absorbs recoil forces and utilizes the absorbed recoil force to cycle the firearm.

Abstract: A firearm having a toggle and bolt assembly. The bolt is reciprocal and houses a firing pin connected to a driver which are spring biased by the recoil springs. The firing pin is independent of the bolt and is engaged by a trip and sear mechanism when the weapon is initially cocked. The recoil springs act also as firing pins but are taken out of the system when the gun is cocked. The toggle mechanism is biased toward a bolt closed position by a handle spring. The ejector and trigger are held in place by pins in blind bores to prevent ready conversion to automatic firing.

Abstract: A firearm having a toggle and bolt assembly. The bolt is reciprocal and houses a firing pin connected to a driver which are spring biased by the recoil springs. The firing pin is independent of the bolt and is engaged by a trip and sear mechanism when the weapon is initially cocked. The recoil springs act also as firing pins but are taken out of the system when the gun is cocked. The toggle mechanism is biased toward a bolt closed position by a handle spring. The ejector and trigger are held in place by pins in blind bores to prevent ready conversion to automatic firing.

Abstract: The present invention relates to a light-weight automatic rifle with a housing with removable attachments, specifically a longitudinally coaxial barrel, a grip with a trigger mechanism, a shoulder rest, a clip, and sights. The slide slides back and forth in the housing in back of the barrel and along a cheek, resting in its frontmost position against the rear end of the barrel and with locking components that securely engage accommodations in the housing. The housing is a hollow plastic housing and it accommodates a metal sleeve, which is coaxial with the barrel. The rear of the barrel is inserted in the front of the sleeve, and the accommodations are on the rear of the sleeve.

Abstract: An automatic liquid spraying system extinguishes burning embers and residue emaining after firing of a cannon assembly. The spraying system has nozzles mounted on moveable mounted arm means for spraying the liquid co-axially into the cannon tube breech and projectile area and onto the obturator spindle axis. In one embodiment, external electric and pneumatic powered sources provides the power to operate the system; and in another embodiment, a self-powered squirt gun type hydraulic source provides the power.

Abstract: A tubular adapter (12) is clamped onto the muzzle (16) of a firearm (18). The adapter (12) is axially split where it surrounds the muzzle (16). A clamp ring (38) surrounds fingers (44) which are between the splits (28) and squeezes the fingers (44) diametrically inwardly into tight clamping engagement with the muzzle (16). The clamp ring (38) is made from a material that shrinks when it is heated. The adapter (12) includes external threads (20) and axial grooves (64) formed in the threads (20) which are spaced circumferentially about the adapter (12). A tubular weight member (14) is attached to the adapter (12) by internal threads (26) which mate with the external threads (20) on the adapter. One or more detent balls (46, 48) carried by the weight (14) enter into the grooves (64) and serve to lock the weight (14) into set positions on the adapter (12). The detent bails (46, 48) and grooves (64) provide for an axial position adjustment of the tubular weight (14) in discreet increments.

Abstract: A continuous wave radar for detecting a relative velocity between a target and a mobile object where the radar is loaded, and for detecting whether the mobile object is relatively approaching to or separating from the target. The radar has a hybrid circuit for branching an oscillation signal of a fixed frequency outputted from an oscillator into two oscillation signals. A transmitting antenna is provided for irradiating one of the oscillation signals branched by the hybrid circuit, and a receiving antenna is provided for receiving radio waves reflected from the target. The continuous wave radar further has an image cancel mixer for detecting, on the basis of the frequency of the other oscillation signal branched by the hybrid circuit, a first signal of an upper sideband frequency and a second signal of a lower sideband frequency of the received signal obtained via the receiving antenna.

Abstract: A damping device for a gun barrel (1) having a muzzle brake (2) comprises a recoil brake (3) and a vibration damper (9) to prevent natural vibrations in the gun barrel when firing a shot, from propagation to the recoil brake. The connection of the vibration damper to the recoil brake (3) and the gun barrel breech (5) is such that the force transfer coupling between the breech and the recoil brake is reduced with respect to said natural vibrations. The vibration damper (9), which may take the form of a column of Belleville springs (10) is dimensioned so that the damping device as a whole has a rigidity substantially less than the recoil brake alone and forms a vibratory system with a natural frequency substantially lower than the frequency of said natural vibrations of the gun barrel when firing a shot.

Abstract: This disclosure relates to a method and device in which plasma arc is vectorally mobilized to ignite and create a moving burning propellant front such that high muzzle velocities are attained under low pressures. Primarily, electromagnetic forces are used to impart direction and velocity to an ionized conductive plasma arc mass in an electrothermal-chemical cartridge. The plasma arc mass is electromagnetically directed and accelerated through a combustion chamber and a gun tube thus imparting a traveling constant pressure and thrust behind a projectile to thereby yield very high muzzle velocities.

Abstract: This disclosure relates to a plasma generation device particularly adapted to an electrothermal-chemical propulsion system. The device comprises a membranous conductive substance having structural compositions which enable the formation of a continuous and volumetrically distributed plasma arc. The membranous substance is versatile and operates, inter alia, as a fuse wire, plasma incubator, plasma container, plasma distributor, plasma infusion and permeation media as well as a fuel container.

Abstract: An improvement for retaining sling swivels on a firearm where web or narrow fabric is used in place of cord. Holes in an outer retaining piece and an inner cushioning piece can be of any shape. An extending projection may be used in the holes to conform the web or narrow fabric to the openings in the sling swivel.In another embodiment, a wire may be enclosed in a closed web loop. A tab, which is folded and stitched, is formed adjacent to an outer retaining piece.

Abstract: A multi-stage trigger assembly for use by a shooter of a firearm. Specifically an AR-15 or M-16 although other types of firearms could be used. The invention comprises a trigger, a disconnector, disconnector spring, and a hammer. The trigger and the hammer each include a respective engagement means for engaging each other so that the hammer is held in a cocked position by the trigger before the trigger is pulled. The hammer further includes a contact means for contacting the disconnector so that when the trigger is first pulled (the first stage) the contact means contacts the disconnector at a predetermined time and increases the pressure required to pull the trigger completely and disengage the engagement means of the hammer and the trigger (the second stage). Additionally, the disconnector is spring loaded by the disconnector spring and pivotally connected to the trigger.

Abstract: A nozzle is provided which is capable of varying the direction of discharge of a fluid. As shown in FIG. 2 the nozzle 11 has sidewalls defining a circular opening 12 and a plug 14 mounted within the nozzle for transverse movement in the plane of the nozzle outlet. Thus a component of velocity can be imparted to the jet in any direction around 360.degree. in the plane of the nozzle outlet.Operation of the nozzle is by means of a plurality of piston-in-cylinder devices 18,20 acting between the plug 14 and the nozzle sidewalls. The plug is mounted on an arm 15 in a universal joint 16.

Abstract: A weapons system that fires projectiles of 20 to 500 millimeters or larger in diameter using a compression-ignition combustion of common fuel oils in conjunction with pre-compressed air as the firing force, in which automatic breech loading occurs during resetting, to enable a continuous, automatic rapid fire. Fuel pumped at a high pressure enters a combustion chamber, previously filled with high pressure air from an external compressor, where an extremely rapid combustion occurs, resulting in compression of the air in a charge chamber. A control valve then opens, allowing compressed air from the charge chamber, where high pressure fuel is then injected and instantly vaporized and combusted to propel a projectile through a barrel. A loading ram concurrently engraves the next round into a breech block chamber. In the resetting process, the valve reseats, air from an external compressor enters the combustion chamber via a check valve, and the combustion chamber is vented to the atmosphere.

Abstract: A drive device comprises driving and driven members, and first and second elements, one of the elements being movable with respect to the other. Energy derived from the coming together of the elements is stored, preferably hydraulically, and transferred to the driving member. Advantageously, the drive device is applied to a gun whereby the device may be used to drive the breech opening and closing mechanism and/or the loading tray. The first and second elements include the beating plate and a part of the breech structure. Energy to be stored and transferred is obtained from the recuperation of the gun after firing.