Sonic pulse generating device

Claim 1

A DEVICE FOR GENERATING AN EASILY DISTINGUISHED SERIES OF SONIC PULSES FREE OF SECONDARY REVERBERATIONS WHICH COMPRISES A SHELL HAVING ONE CLOSED AND ONE OPEN EXTREMITY, A PLURALITY OF CYLINDERS POSITIONED AXIALLY WITHIN THE SHELL FROM THE CLOSED EXTREMITY TOWARD THE OPEN EXTREMITY THEREOF, EACH OF SAID CYLINDERS BEING IN SNUG PERIPHERAL ENGAGEMENT WITH THE SHELL WALL AND EACH OF SAID CYLINDERS BEING CONSTRUCTED OF A DUCTILE MATERIAL AND HAVING AXIALLY THERETHROUGH A CORE CONTAINING A HIGH VELOCITY DETONATING EXPLOSIVE, A LENGTH OF DEFLAGRATING COMPOSITION EXTENDING LONGITUDINALLY WITHIN THE SHELL BETWEEN EACH OF THE SAID CYLINDERS, A PORTION OF SAID DEFLAGRATING COMPOSITION BEING CONTAINED IN A HEAVY-WALLED TUBE AND AN IGNITION ASSEMBLY SEALED IN AND CLOSING THE OPEN EXTREMITY OF SAID SHELL, SAID IGNITION ASSEMBLY BEING POSITIONED WITHIN THE SHELL IN IGNITING RELATIONSHIP TO THE NEAREST OF THE SAID DEFLAGRATING CORES, WITH THE PROVISO THAT SAID EXPLOSIVE IS OF SUCH QUANTITY AND SO DISTRIBUTED THAT THE SHELL WALL IS NOT RUPTURED BY THE DETONATION THEREOF WHEN SAID DEVICE IS IMMERSED IN WATER.