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

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 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: 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.