Sweat cooled articles

Claim 1

IN A MISSILE COMPRISING A JET REACTION MOTOR AND A NOSE CONE, A JACKETED WALL FOR COOLING BOTH THE MOTOR AND CONE, SAID WALL CONSISTING OF CLOSED COOLING COMPARTMENTS DIVIDED INTO AXIALLY DISPOSED SEPARATE ANNULAR ZONES, SAID SEPARATE ANNULAR ZONES HAVING A POROUS WALL ADJACENT TO THE HEAT ZONE INTERIORLY FOR THE MOTOR AND EXTERIORLY FOR THE NOSE CONE, SAID POROUS WALL SEALED WITH A MATERIAL OF LOW MELTING POINT, THE POROUS WALLS ADJACENT THE HEAT ZONES OF HIGHER TEMPERATURES HAVING A GREATER POROSITY FOR AN INCREASED RATE OF COOLING AT THOSE POINTS, A VAPORIZABLE COOLING MEDIUM SEALED WITHIN EACH ZONE BY THE CLOSED POROUS WALL TO FORM SEPARATE SELFSUFFICIENT INDIVIDUAL COOLING UNITS IN EACH ZONE, SAID COOLING MEDIUM BEING A MIXTURE OF SEVERAL LIQUIDS OF DIFFERENT VOLATILITY WITH THE MORE VOLATILE LIQUIDS VAPORIZING AT LOWER WALL TEMPERATURES FOR COOLING AND THE LESS VOLATILE LIQUIDS VAPORIZING FOR PROTECTION AT HIGHER WALL TEMPERATURES, THE COOLANT MIXTURE OF EACH ZONE VAPORIZED BY THE HEAT AT THE CORRESPONDING POROUS WALL OF THAT ZONE TO MELT THE STORAGE SEAL AND EACH ZONE EXUDING THE VAPORIZED COOLANT FROM ITS RESPECTIVE COOLING UNIT BY ITS OWN VAPOR PRESSURE THROUGH ITS POROUS WALL AT A RATE INDIVIDUALLY GOVERNED BY THE HEAT AND THE POROSITY OF THAT PARTICULAR WALL, TO PROVIDE A SEPARATE AND SELF-REGULATED COOLING EQUILIBRIUM FOR EACH ZONE WHEREBY THE MOTOR ON ASCENT AND THE NOSE CONE ON REENTRY ARE SUFFICIENTLY COOLED.