Rocket and propellant charge therefor

Claim 1

A JET-PROPELLED DEVICE COMPRISING, IN COMBINATION, AN EXHAUST NOZZLE, A CASING DEFINING A COMBUSTION CHAMBER, AND A COMPOSITE SOLID PROPELLENT CHARGE DISPOSED IN SAID CHAMBER, SAID CHARGE GENERALLY CYLINDRICAL IN FORM AND HAVING AN AXIAL PERFORATION, SAID CHARGE COMPRISING A PLURALITY OF CONCENTRIC CYLINDRICAL STRATA OF PROPELLANT MATERIAL, EACH OF SAID STRATA COMPRISING A PLURALITY OF CYLINDRICAL IMPERFORATE SEGMENTS BONDED TOGETHER AND TO OTHER STRATE CONTIGUOUS THEREWITH WITH A PROPELLENT MORTAR, SAID AXIAL PERFORATION DEFINED BY THE EXPOSED INNER SURFACE OF THE INNERMOST STRATA, SAID CHARGE BEING RESTRICTED AT ITS ENDS AND AT ITS OUTER SURFACE, THE LATTER SURFACE BEING BONDED TO SAID CASING, SAID PROPELLANT MATERIAL COMPRISING A MIXTURE OF AN INORGANIC OXIDIZING SALT AND A RUBBERY COPOLYMER FORMED BY POLYMERIZING A VINYL PYRIDINE AND A CONJUGATED DIENE HAVING 4 TO 6 CARBON ATOMS PER MOLECULE.