Pyrotechnic charge which burns at constant pressure - comprises a powder charge disc coated with a combustion inhibitor applied as a pattern of shaped motifs

摘要

Elementary pyrotechnic charge comprises a powdered element partially coated with a combustion inhibitor material. The element is in the form of a plaque whose thickness is small in comparison with its other dimensions. The inhibitor coating comprises a series of patterns of geometrical shape distributed over virtually the whole of at least one face of the powder disc, the patterns being disposed along virtually parallel lines. The charges are esp. for use in firing guns, where the inhibitor coating modifies the combustion of the powder charge such that firing takes place at virtually constant pressure and the projectile leaves the barrel at maximum velocity.