Abstract: A booster shell, comprising: an elongate body defining a chamber for an explosive composition, the body comprising an upper end and a lower end; an inlet at the upper end of the elongate body adapted to allow an explosive composition to be delivered into the chamber; a detonator receiving passage adapted to receive a detonator, the detonator receiving passage: (a) extending within the chamber from the upper end of the elongate body to the lower end of the elongate body; (b) being integrally formed with the elongate body; and (c) including a detonator stop at or near to the lower end of the elongate body; and a detonator lead guide adapted to receive the lead of a detonator, the detonator lead guide: (a) extending from the upper end of the elongate body to the lower end of the elongate body and (b) being integrally formed with the elongate body.

Abstract: A firearm impingement apparatus that is operable to divert a portion of the gas flowing into the gas block of the impingement apparatus so as to reduce the temperature and contamination thereof. The impingement apparatus includes a gas block integrally formed with a barrel-mating sleeve. The gas block includes a gas block port line that is in axial alignment with a gas vent tube located on a barrel of a firearm. The gas block further includes at least one exhaust port fluidly coupled with the gas block port line. Movably secured within the at least one exhaust port is an adjustment screw. The adjustment screw is movable intermediate a first position and a second position so as to facilitate diversion of gas from the gas block at varying volumes.

Abstract: A fan unit for a heat exchanger of a vehicle, has a plate-like support structure or shroud which has a main opening defining a passage for a flow of air for ventilation of the heat exchanger, and an electric fan arranged to cause the flow of air. The fan has a drive motor and an impeller connected to the motor. The support structure or shroud has a top side intended to extend at a small distance from a horizontal cross-member of the heat exchanger or the vehicle, so that an interspace is defined between them. This top side of the support structure or shroud has a flexible sealing gasket which has a configuration such that, in the assembled operating condition of the fan unit, the gasket is able to close off the interspace.

Abstract: An impact-safe projectile launcher for use within an inflatable structure is presented. The projectile launcher comprises a launch tube having an inner end and an outer end. A mount connects the launch tube to the inflatable structure, e.g. a bounce house. An air inlet is provided at the inner end of the launch tube. A projectile inlet is provided downstream of the air inlet at the inner end of the launch tube. An air blower is connected to the inflatable structure and operatively connected such that air flows continuously from the air blower through the air inlet down the launch tube. The continuous flow of air propels impact-safe projectiles that are inserted into the projectile opening down the launch tube and out of the projectile launcher through the outer end of the launch tube.

Abstract: A multi-purpose stun gun is provided with a housing including top launchers, a sound and light interference device adjacent to the launchers, a front recess under the launchers; first triggers adjacent to the launchers respectively, a rear handle, a high-voltage generator in the handle, a battery power supply in the handle for supplying electricity to the high-voltage generator, a second trigger on the housing and electrically interconnecting the high-voltage generator and the launchers, a safety on the housing for locking the second trigger, and positive and negative electrodes on the front recess and electrically connected to both the high-voltage generator.

Abstract: A nacelle structure for a gas turbine engine includes a core engine nacelle disposed about an engine axis and an outer nacelle disposed about the core engine nacelle. A bifurcation extends between the outer nacelle and the core engine nacelle along a bifurcation axis extending between the outer nacelle and the core engine nacelle. The bifurcation includes at least one mounting surface that is disposed at a non-normal angle relative to the bifurcation axis.

Abstract: The invention relates to remotely controlling a number of devices on an instrument mounted on a rotating assembly without physical contact to the assembly. A series of infrared light-emitting diodes mounted in a stationary ring configuration are placed around (but not directly touching) the rotating assembly to send control signals to infrared receiver devices located on the assembly. The rotating assembly might be the turret of a conventional Common Remotely Operated Weapons Station (CROWS), the invention to replace convention internal slip-ring providing power and control to a gun on the CROWS. The infrared data links of this invention do not inhibit the movement of the rotating assembly, and further are not susceptible to radio-jamming by electronic warfare countermeasures. Additionally, the invention includes a mount that allows auxiliary devices with Picatinny Rails™ to also be attached to such a CROWS turret.

Abstract: An explosive booster assembly (70) which includes a primary module (10) with a first housing (12) and a first booster (14), wherein a detonator (62) is engageable with the first housing, and an auxiliary module (30, 30A) which comprises a second housing (32) with a second booster composition (34), wherein the second housing (32) is interengageable with the first housing (12) to expose the first booster composition (14) to the second composition (34), and wherein any number of substantially identical auxiliary modules (30, 30A) are engageable with one another in order to form a compound booster assembly.

Abstract: An adapter for a QD socket is disclosed. The adapter has a connection post having a plurality of tabs movable relative to each other between a first configuration and a second configuration. The first configuration defines a maximum effective outer diameter of the connection post, and the second configuration defines a minimum effective outer diameter of the connection post. A method of modifying a quick disconnect attachment is also disclosed.

Abstract: An impeller (2) for a centrifugal pump includes a first shroud having a plurality of blades (8). A second shroud is joined onto the first shroud by way of welding. Each blade (8) has an apex region (12), at which the blade contacts the second shroud. At least one of the blades (8) in a first section (20) of the apex region (12) has a weld connection to the second shroud, and in at least one second section (14) of the apex region (12) is free of a weld connection.

Abstract: A composite ammunition magazine comprises a box with a follower slidably disposed in the box and a spring disposed between a bottom of the box and the follower and biasing the follower towards an open top. A pair of opposite lips extends from proximal ends at opposite sides of the open top in an arc to distal free ends over the open top of the box. The box and the pair of lips comprise a composite material comprising fibers in a resin matrix with the sides of the box comprising hoop fibers oriented at 0 degrees and axial fibers oriented at 90 degrees, and the pair of lips comprising lateral fibers oriented at 0 degrees and arc fibers extending in an arc and oriented at 90 degrees with respect to the lateral fibers. The pair of lips comprises more arc fibers than the axial fibers in the box.

Abstract: A propeller system for an aircraft includes a propeller assembly rotatable about a central axis and a reduction gearbox operably connected to the propeller assembly via a propeller shaft. An electrical power transfer system is positioned such that the gearbox is located axially between the electrical power transfer system and the propeller assembly. The electrical power transfer system includes a slip ring assembly secured to an oil transfer tube extending to the propeller assembly and a brush block interactive with the slip ring assembly to transfer electrical power to a plurality of lead wires extending from the slip ring assembly to the propeller assembly. The brush block is positioned such that brush block tips of the brush block extend toward the slip ring assembly in a substantially radial direction relative to the central axis of the propeller assembly.

Abstract: A magazine for a firearm is formed by a plurality of sidewalls that define a space for holding ammunition cartridges. An opening between two of the walls provides access to the space. Feed lips are positioned on opposite sides of the opening. The feed lips contact and retain the cartridges within the space. Feed ramp surfaces are positioned on opposite sides of the opening. The feed ramp surfaces are angularly oriented to tilt a cartridge so that it may be fed into the chamber of a barrel as it is pushed out of the opening along the feed ramp surfaces. Guide surfaces are positioned on opposite sides of the opening between the feed lips and the feed ramp surfaces. The guide surfaces guide the cartridge as it disengages from the feed lips and moves up along the feed ramp surfaces.

Abstract: A system and method for a user's appendages when firing a weapon is described. One embodiment includes a cover kit for a firearm handguard. The kit has a base and an insert. The base has a longitudinal axis, an upright axis, a transverse axis, a socket, an exterior surface, and an interior surface. The insert has an insert body and a plug. The socket has a movable engagement prong shaped to engage a wall surface of a handguard slot. The plug has a prong engagement surface shaped to engage the engagement prong. The plug is shaped to apply a force on the engagement prong such that a distal portion of the engagement prong is flexed more than a proximal portion of the engagement prong.

Abstract: A charging handle for a firearm includes a T-handle with a receiving slot for a latch plate that pivots between latched and unlatched positions about a pivot pin. The latch plate includes a finger grip and a thumb pad that permit ambidextrous operation of the latch plate. A latch return assembly including a spring returns the latch plate to a latched position.

Abstract: A rail mounting system for a firearm includes a shroud on the fore end having a plurality of spaced rectangular pads with raised, rectangular top surfaces and opposed sloping sides forming an opposed pair of side walls that intersect with the shroud surface at an acute angle. The rail mounting system also includes a mounting rail having spaced apart relief sections conforming to the locations of the pads with recessed rectangular relief bottoms and opposed sloping sides forming an opposed pair of angled side walls at the same angle as the pad side walls. The side walls of the pads and relief sections are in contact with each other along at least some of their vertical distances. The pad top is spaced from the relief bottom and the shroud surface is spaced from the rail underside.

Abstract: A metal annular casing (16) for a turbine engine compressor, the casing having at least one annular row of radial chimneys for receiving outer cylindrical pivots of variable-pitch vanes, together with an outer cylindrical centering track (28) that is continuous or interrupted and against which runners carried by an annular ring for controlling the pitch of the vanes are to come to bear, the casing being characterized in that the track is formed by blocks (30) of plastics material fitted onto the casing and that are fastened or held on the casing.

Abstract: An improve firearm rifling is provided in which the trailing edge face of the land is significantly longer than the rifling land top surface. The trailing edge angle between the trailing edge face and the level of the groove floor surface is a much smaller angle than conventional rifling land trailing edge angle, while the leading edge angle of the disclosed embodiments may be akin to a conventional rifling leading edge angle. Due to this, the present embodiments provide a rifling land profile that is nonsymmetrical, with the trailing edge face being at a much lower angle than the leading edge face which is configured in a more upright orientation.

Abstract: An aerofoil component of a gas turbine engine is provided. The component has a longitudinally extending aerofoil portion which spans, in use, a working gas annulus of the engine. The aerofoil portion contains an internal chamber for a flow of coolant. The chamber includes a helical passage which spirals in a plurality of turns around an axis that extends in the length direction of the aerofoil portion.

Abstract: In a sealing device which seals between an outside space between an outer side in the radial direction of an external diffuser which has a tubular shape and forms an exhaust channel through which combustion gas rotating a rotor of a gas turbine passes in the inner side in the radial direction and an outside member which is disposed outside the external diffuser with an interval between them in the radial direction, and the exhaust channel by an end of the external diffuser, a first seal plate group and a second seal plate group in which a plurality of seal plates, which extend to the outer side in the radial direction from the end of the tubular external diffuser and reach the outside member, are laminated in contact with each other, and a spacer which maintains the first seal plate group and the second seal plate group with an interval in an axial direction in which a rotational axis of the rotor extends are provided.