Hot-wire ignition initiator for propellant charges

摘要

The invention relates to a hot-wire ignition initiator for propellant charges for artillery and rockets.PPThis 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° C.; (b) of an ignition pyrotechnic composition 6 formed of at least one oxidant and one reducer, which composition is arranged in the vicinity of or in contact with the initiator composition, this ignition composition having a coefficient of sensitivity to impact of at least 100 joules, a coefficient of sensitivity to friction of at least 300 N, a coefficient of sensitivity to static electricity of about 500 millijoules, and an ignition temperature of between 400° and 750° C.