PRIMER CAP Russian patent published in 2006 - IPC F42C19/10 

FIELD: primer caps for small arms cartridges.

SUBSTANCE: the primer cap has a metal cap with a weight of firing-igniting composition covered from the top with a protective layer, the weight of the firing-igniting composition is made in the form of two layers, a layer of firing composition made of an explosive with a burning rate of 1.3 to 25 m/s and positioned near the bottom of the cap of the igniting composition made of a fast-burning explosive with a low sensitivity to blow, the weight relation of the layer of firing composition and the layer of igniting composition makes up 0.04 to 0.95. The use of the new primer cap, for example in a 7.62-mm rifle cartridge With various modifications of the firing-igniting composition provides for stable ballistic characteristics within a temperature range from 50 to minus 50C.

EFFECT: enhanced reliability of the round.

7 cl, 4 tbl