Manufacture of propellant charges

Claim 1

A CYLINDRICAL GAS PRODUCING CHARGE HAVING A VARIABLE TOTAL BURNING AREA DURING FIRING, A HOLLOW TRUNCATED SEPTUM OF EQUAL HEIGHT AS SAID CHARGE AND BEING ENCLOSED BY SAID CHARGE, THE BASE OF SAID SEPTUM BEING THE SAME SIZE AND IN THE SAME PLANE AS ONE END OF THE CYLINDRICAL CHARGE, AN AXIAL CONDUIT IN THE FORM OF A CONE HAVING ITS APEX AT THE SAME END OF THE CYLINDER AS THE BASE OF SAID SEPTUM AND HAVING A BASE IN THE PLANE OF THE OTHER END OF SAID CYLINDER THE SAME SIZE AS THE OTHER END OF SAID SEPTUM, SAID OTHER END OF SAID SEPTUM BEING SUBSTANTIALLY ONE-HALF THE DIAMETER OF SAID CHARGE, SAID AXIAL CONICAL CONDUIT BEING ARRANGED WITHIN SAID SEPTUM, THE PORTION OF THE SAID CHARGE BETWEEN THE SEPTUM AND THE OUTER CYLINDRICAL WALL OF THE CHARGE CONTAINING ONE PROPELLANT OF A PREDETERMINED RATE OF BURNING, AND THE PORTION OF THE CHARGE BETWEEN THE SEPTUM AND THE CONICAL AXIAL CONDUIT CONTAINING A SECOND PROPELLANT OF A PREDETERMINED FASTER RATE OF BURNING, THE TWO SAID PROPELLANTS BEING SO DUAL RATE OF DISCHARGE OF THE GASES OF COMBUSTION FROM THE BURNING OF SAID PROPELLANTS IS MAINTAINED SUBSTANTIALLY CONSTANT.