ELECTRIC DETONATOR Russian patent published in 1995 - IPC

FIELD: blasting operations. SUBSTANCE: detonator has case 1, compacted explosive charge 2, lightly compressed explosive charge 3, sealing plug 5 with auxiliary lug 6. Lug 6 has pointed tip bearing exploding bridge 4 made of thin wire or bus applied onto strong synthetic dielectric thread in the form of spiral or cylinder . Explosive may be added with aluminium powder in an amount of 0.5 to 10% mass. If case 1 is made of plastic, plug should be fastened to case by means of outer metal ring with the use of collet- or roller-type crimper. Plug lug may be made in the form of truncated prism. This design of lug 6 provides for most efficient density and density gradient of secondary power explosive in area of exploding bridge 4. EFFECT: improved reliability and higher sensitivity to triggering pulse. 5 cl, 6 dwg