Abstract: A container for containing a thermosetting explosive charge and delay detonator element is provided. The lower portion of the container has an open bottom and contains the cast explosive charge. A projection and recess are located in that portion of the container which contains the cast explosive charge for retaining the explosive charge within the container and for preventing movement of the charge relative to the container once the charge has solidified. A tubular conduit is longitudinally disposed on the exterior of the container and dimensioned to receive a detonating cord. The container includes an integral alignment structure and housing for the insertion of a delay detonator unit having an initiating element and a delay detonator element adapted so that the initiating element can be positioned adjacent the tubular conduit with the delay detonator element positioned adjacent the cast explosive charge.

Abstract: A nonelectrically initiated delay booster assembly includes a booster shell containing an explosive material, a cap well extending through one end of the booster shell into the explosive material, a nonelectric delay cap in the well and a detonating cord tunnel surrounded by a shock absorbing material affixed to the side of the booster shell or enclosed inside the booster shell. A signal carrier extends from a point within the cap to a point adjacent a detonating cord extending through the detonating cord tunnel, and a sensor member is affixed to that end of the signal carrier that is external to the booster shell in such a manner that it is in initiating relationship with the detonating cord extending through the detonating cord tunnel. A plurality of these boosters can be affixed to a single detonating cord downline when conducting multi-deck blasting operations.