Abstract: A linear explosive charge with constant detonation velocity, comprising a plurality of series-coupled explosive units or sticks. All sticks are identical and comprise a tubular member of selected length, with matched couplings. A helix of explosive cord is positioned around the tubular member, with ends inserted through openings into the interior of the tube and out through the couplings. At the top end of the stick a length of elastic tube is inserted, over the projecting cord, into the top coupling. When two sticks are to be coupled, the downward projecting cord of the top stick is inserted into the elastic tube along side the starting end of the cord of the second stick. This stretches the tube, which presses the two cords into intimate cross-detonation condition. Small ring-shaped concentrated explosive units can be inserted into the bottom end of the top stick over the explosive cord, as synchronous booster charges.

Abstract: A linear explosive charge with constant detonation velocity comprising, a plurality of separate similar sticks that can be axially coupled into a long linear substantially rigid assembly. Each of the sticks includes a helical winding of linear explosive cord on its outer surface, the ends of the cord are coupled to the ends of the cord on adjacent sticks, so as to carry the detonation of the cord from one stick to the next. Separate booster explosive charge units are coupled into each of the junctions between sticks, to provide additional explosive units which are synchronously detonated by the passage of the cord detonation from stick to stick.