Nico-pyrotechnik Hanns-juergen Diederichs Kg.

Nico-pyrotechnik Hanns-juergen Diederichs Gmbh & Co. Kg

Hanns-juergen Diederichs Kg

Willi Luebbers

An ignition device for mines, in particular training mines. The device includes a percussion bolt which is mechanically held in an inoperative position and is loaded by the action of a coil spring so that when released it is propelled axially towards a pyrophoric ignition charge to initiate an ignition chain. The ignition device is of simple and inexpensive construction and can be mechanically released by forces acting in a variety of directions. The device includes a cylindrical housing in which a percussion bolt and actuating lever are mounted one behind the other in axial alignment. A plurality of cup-shaped members, preferably a pair, are mounted in the housing so as to surround at least a portion of the actuating lever and percussion bolt. Upon actuation of the lever by applying a force thereto in a predetermined direction the cup-shaped members are spread apart against a biasing force to release the percussion bolt in the firing direction.

Ignition device

Crowd control projectile and a method of ejecting flash and acoustic shock charges from said crowd control projectile. The projectile comprises a housing containing a fuse acting on a delay charge for igniting an ejector charge and at least one charge which can be ejected from the housing without destroying the housing. The projectile has a lid which is blown off by a slight pressure build-up in the container and at least one flash and acoustic shock charge arranged in a tube which is disposed in the housing together with an ejector and scatter charge which is ignited by the delay charge via a fuse cord. The crowd control projectile may also contain a smoke or irritant substance charge disposed in a tube or separate compartment of the projectile which is adapted to be ignited by said delay charge. In an alternate embodiment of the crowd control projectile the upper half of the projectile is constructed as described hereinabove and is mechanically connected to a lower half. A delay charge is interposed between the upper and lower half and ignites the lower half after a predetermined period of time. The lower half in turn has an ejector charge which is ignited by the interposed delay charge which in turn ejects at least one charge from the lower half of the projectile.

Crowd control projectile and method of ejecting same

A practice projectile for mortars and the like which has a nose fuse mounted on a shell casing. A pyrotechnic charge is disposed in the shell casing. A tail section is mounted in the rear of the shell casing and holds a propellant charge. A percussion cap is mounted in the nose of the projectile and is adapted to be ignited by the nose fuse. A central pipe, having one end opposite the percussion cap, extends from the proximity of the percussion cap to the proximity of the propellant charge in the tail section. The flame from the percussion cap travels through the central pipe and ignites the propellant charge which causes the tail section to be expelled from the rear of the shell casing to thereby expose a rear opening in the shell casing through which the pyrotechnic gases produced by the also ignited pyrotechnic charge are expelled.

Practice projectile for mortars and the like

An improved construction for a percussion fuse interposed between a charge-carrying shell body and a shell head disposed forwardly of the shell body is described. An impact body, which carries the percussion cap of the fuse and which is normally maintained in its rearmost position to hold the cap away from a firing pin extending rearwardly from the shell head, is provided with an inwardly and rearwardly extending frustoconical recess in its front surface, such recess terminating at the front surface of the percussion cap. A conventional inertial sphere is normally disposed within the first recess during the acceleration phase of the shell flight, and is movable forwardly in an inertial manner toward the shell head during a subsequent deceleration of the shell. The firing pin in the shell cap is in turn formed from a forward cylindrical portion, which defines a sphere-receiving annular recess with the surrounding wall of the shell head, and a rear conical portion which conforms to the conical angle of the first recess in the impact member to define a sphere-clamping chamber therebetween when the shell is suddenly decelerated during the normal acceleration portion of its flight.

Percussion fuse assembly

An improved percussion fuse for a mortar or similar explosive munitions shell is described. The fuse body that interconnects the charge-carrying shell body with the shell head disposed forwardly thereof has a sleeve portion in which a radial bore is disposed. A conventional impact member that carries the percussion fuse and that is slidable axially within the sleeve has a mating, V-shaped groove that cooperates with the bore in the sleeve to normally retain a locking sphere therein; such locking sphere normally prevents the forward movement of the impact member against the primer that is carried at the rear portion of the shell head. An easily puncturable, membrane-like closure member is disposed over the bore in the sleeve portion of the impact member to retain the blocking sphere in its seated position after the shell cartridge has been separated from the shell during the firing operation. During deceleration of the fired shell, the groove in the impact member moves forwardly to cam the captured blocking sphere in a radially outward direction, whereupon the latter punctures the closure member and escapes. Accidental detonation of the fired shell during an initial portion of the shell trajectory is prevented by the provision of a pair of offset recesses in the confronting surfaces of the impact member and the shell head, the radial interface between such recesses serving to prevent the percussion cap in the impact member from contacting the primer.

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Trittau, Germany

Willi Luebbers