Material breaking cartridge construction

Claim 1

IN COMBINATION; A CARTRIDGE BODY HAVING ARRANGED THEREIN SUCCESSIVELY LONGITUDINALLY THEREOF IN THE ORDER NAMED A CYLINDRICAL RELEASE CHAMBER IN WHICH A MATERIAL BREAKING CHARGE OF COMPRESSED GAS IS TO BE DEVELOPED AND FROM WHICH THE CHARGE IS TO BE RELEASED, LATERAL GAS CHARGE RELEASE PORTS, AND A CYLINDRICAL CONTROL CHAMBER; MEANS FOR CONNECTING SAID CARTRIDGE BODY TO A SOURCE OF COMPRESSED GAS TO SUPPLY THE SAME DIRECTLY TO SAID RELEASE CHAMBER, A VALVE CLOSURE MEMBER SECURED TO SAID CARTRIDGE BODY IN SAID CONTROL CHAMBER AND HAVING A CYLINDRICAL END PORTION ADJACENT SAID RELEASE PORTS WITH ITS PERIPHERAL SURFACE UNIFORMLY SPACED FROM THE INNER WALL OF SAID RELEASE CHAMBER, AN ANNULAR DISCHARGE VALVE SLIDABLY MOUNTED IN SAID RELEASE CHAMBER IN SEALING RELATION TO SAID RELEASE PORTS AND TELESCOPED WITH SAID CYLINDRICAL END PORTION OF SAID VALVE CLOSURE MEMBER, A FILLING OF GAS IN SAID CONTROL CHAMBER AT PREDETERMINED PRESSURE HOLDING SAID ANNULAR DISCHARGE VALVE IN CLOSED POSITION, THE VOLUME OF SAID CONTROL CHAMBER INTO WHICH SAID ANNULAR DISCHARGE VALVE MOVES BEING SUBSTANTIALLY GREATER THAN THE EXTENT TO WHICH IT IS REDUCED BY THE ENTRY OF SAID ANNULAR DISCHARGE VALVE, THE ENDS OF SAID ANNULAR DISCHARGE VALVE BEING SUBJECT, RESPECTIVELY, TO THE GAS PRESSURE IN SAID CONTROL CHAMBER AND THE GAS PRESSURE IN