Precision delay detonator

Abstract From the Canadian patent

A delay detonator for detonating an explosive charge includes a tubular member having a closed end and an open end a primary base, charge disposed in the closed end of the tubular member and capable of detonating the explosive charge when ignited a delay train, charge disposed adjacent to the primary base charge for burning in response to an ignition signal to thus ignite the primary base charge, an ignition source disposed in the tubular member near the open end for developing an ignition signal and a transition element, disposed between the delay train charge and the ignition source and responsive to an ignition signal from the ignition source for igniting to achieve a substantially …