PRIMER BLOCK (MODIFICATIONS) Russian patent published in 2008 - IPC F42B3/10 F42B1/04 

FIELD: production of blasting gears of explosive charge.

SUBSTANCE: three modifications of the primer block are offered. The primer block (modification 1) has an explosive charge in a cylindrical case and an insert of explosive with a seat for the primer cap and placed inside it on the side of one of the ends. The charge is made of a high explosive insensitive to the primary means of initiation. The insert is made of a high explosive sensitive to the primary means of initiation, it has two halves symmetric relative to the plane passing through the insert axis parallel with the central axis of the primer block. For location of the detonating cord in the explosive charge two through ducts located symmetrically to the insert are made, they are made in parallel with the central axis of the explosive charge and connected by a wedge-shape groove to the end face surface of the insert on the side of the seat for the primer cap. In the primer block of modifications 2 and 3 provision is made for another locating of the ducts for the means of initiation.

EFFECT: enhanced perceptibility to the means of initiation, reliable initiation and efficiency of action of the primer block.

24 cl, 13 dwg