Igniter for a block of propellant powder

摘要

An igniter for a combustible powder block comprises a non combustible receptacle with an ignition initiator arranged at one end of the receptacle and a charge in the receptacle for thrusting on to the combustible parts of the block to produce ignition, the charge including a pyrotechnic ejection compound, a pyrotechnic ignition compound and reactive divided metals, the charge having decreasing activity successively from the end of the receptacle carrying the initiative.