Abstract: Pyrotechnic gas generator utilizable particularly on a motor vehicle for operating safety devices, such as safety belt retractors.The generator comprises a resistant body containing an ignition bead (5) and a gas generating charge (3). In order to obtain very short operating times while offering maximum safety and reliability, the gas generating charge is separated from the ignition bead by a dielectric hood (6) which forms a leak-tight initiation chamber (7) around the ignition bead, the gas generating charge being composed of grains of powder based on nitrocellulose and a pulverulent oxyreduction powder containing at least one metal.

Abstract: Pyrotechnic initiators tripped by an electric current passing through a resistive element. These initiators can either be an inflammator, an igniter or a detonator.The pyrotechnic initiator with coaxial structure includes at least one filament (39) connected to the central conductor (34) and to peripheral conductor (35). To improve operating safety while simplifying the structure of the initiator, it is fitted with a standard coaxial connector (33), the end of which, intended for connection of the filament, is modified. The electrical insulation means, between the two conductors (34) and (35) and the electrical insulation means between the peripheral conductor (35) and the outside of the inflammator, include a common dielectric mass (40).