Abstract: A device which transmits an explosion across a bulkhead through a solid hetic barrier while maintaining the barrier integrally intact and without perforating or rupturing it. The barrier separates a first chamber which receives an output explosive-charge from a second chamber which receives a detonating cord. When the detonating cord is ignited it causes an explosive shock wave to cross the barrier and detonate the output explosive charge. The end of the second chamber has a configuration and dimensions congruent with the output end of the detonating cord so that the explosive shock wave directly crosses the barrier without the need for an explosive charge intermediate the cord and barrier wall.