Abstract: The invention relates to a slow combustion composition for long duration pyrotechnic delays. It comprises an oxidant of the perchlorate type according to a percentage in mass of between 75 to 91%, a reductant selected from among the aromatics according to a percentage in mass of between 5 to 20%, 0 to 6% of a binder and 0 to 5% in mass of a nanometric silica powder. Application to the manufacture of cords or fuses for delays having a combustion rate of around 1 mm/s.

Abstract: The invention relates to a slow combustion composition for long duration pyrotechnic delays.

Abstract: A method for stacking fibers less than 10 mm long into a cartridge case, including an impregnation stage for fibers arrayed into at least one skein together with a solidifiable material, the skein being solidifiable inside a mold and then, in the solidified state, being cut into at least two slices each of a thickness which is the desired fiber length. Such cartridges are for use as screens or decoys against radar or other detection or guidance systems.

Abstract: The invention relates to a process to manufacture an object using at least one granular material (16) having a large particle size, for example greater than or equal to 0.1 mm, such process being characterised by the following stages: the granular material or materials are placed in a mould (2) at the same dimensions as the object to be made and incorporating at least one evacuation opening (6), said opening being of a size that is less than the particle size of the material, a liquid-phase binder (21) is poured into the mould, the binder is mixed between the grains of material and the excess binder is drained off through the evacuation opening using suction means (11). Application in the manufacture of igniting tubes or propellant charges for artillery ammunition.

Abstract: The invention relates to a process to manufacture an object using at least one granular material (16) having a large particle size, for example greater than or equal to 0.1 mm, such process being characterised by the following stages: the granular material or materials are placed in a mould (2) at the same dimensions as the object to be made and incorporating at least one evacuation opening (6), said opening being of a size that is less than the particle size of the material, a liquid-phase binder (21) is poured into the mould, the binder is mixed between the grains of material and the excess binder is drained off through the evacuation opening using suction means (11). Application in the manufacture of igniting tubes or propellant charges for artillery ammunition.

Abstract: Tie invention relates to a process to manufacture an object using at least one granular material (16) having a large particle size, for example greater than or equal to 0.

Abstract: The subject of the invention is an ignition component for a pyrotechnic composition or propellant charge. This component comprises at least two electrodes separated by a cylindrical insulating envelope marking out an inner volume, electrodes connected by a conductive ignition fuse arranged in the inner volume, the component thus forming a plasma torch whose size is such that it generates a plasma when it receives an ignition voltage less than or equal to 600 volts and is supplied with electric energy less than or equal to 5000 joules.

Abstract: The invention pertains to a smoke-producing pyrotechnical composition which is designed for the production of a smoke screen that prohibits the transmission of infrared radiance from a target to a pick-up.It includes a compound which generates, through thermal decomposing, carbon particles of which the size is included between about 1 and 14 .mu.m, and an oxidoreducing system which reacts at a temperature that exceeds 1000 degrees C. and a binding agent. The compound which generates carbon particles can be hexachloroethane, hexachlorobenzene, naphtalene, anthracene, or their mixture; the reducing agent can be a metal powder (magnesium) and the oxidizer hexachlorobenzene and/or hexachloroethane.An application to the execution of smoke-producing devices.

Abstract: The invention concerns a method and a smoke-producing pyrotechnical ammunition to shield the visible and infrared radiance in a wave length included between 0.4 and 14 .mu.m emitted by a target. First we produce instantly a first hot aerosol with a fast pyrotechnical composition, which masks the target through diffusion in the visible spectrum and with its emitting potential in the infrared zone. Then, we produce a second aerosol which contains hot carbon particles of which the size is included between 1 and 14 .mu.m with a slow pyrotechnical composition for shielding mainly through diffraction the thermal image emitted by the target. The fast composition includes zinc and zinc oxide, potassium perchlorate, hexachlorobenzene or hexachloroethane powder and a binding agent. The slow composition includes a compound which generates carbon particles of 1 to 14 .mu.

Abstract: The invention relates to a hot-wire ignition initiator for propellant charges for artillery and rockets.This initiator comprises a housing 1 provided with an open cavity 2 within which there is arranged a filament 3 and a pyrotechnic cell composed: (a) of an initiator pyrotechnic composition 5 formed of an oxidant and a reducer, which composition is arranged in intimate contact with the filament, the coefficient of sensitivity to impact of which is at least equal to 100 joules, the coefficient of sensitivity to friction of which is at least 100 N, the coefficient of sensitivity to static electricity of which is about 16 millijoules and the ignition temperature of which is between 250.degree. and 350.degree. C.

Abstract: This invention relates to an electric device for the ignition of pyrotech substances and more particularly an electric device which operates by electromagnetic induction.The device comprises: An induced member 22 placed in a cartridge containing a pyrotechnic substance within a circular opening of the bottom of the case 20, and an inductor located in a cavity 24 made in the thickness of a firing plate 23. The induced member has at least one open turn 31 connected to at least one heating filament 32, mounted on a thin insulating pellet 30, the inductor is a spiroidal winding 25 whose frequency defines the operating frequency of the generator; the inductor comprises a thermal protection means, a mechanical protection means and sealing means.The device can be used in particular in the field of artillery.