Heat insulation for hypersonic vehicles

Claim 1

ON THE CLOSED OUTER SHELL OF A VEHICLE DESIGNED FOR HYPERSONIC FLIGHT, AN INSULATING BLANKET WHICH IS DIRECTLY AHDHERED TO THE EXPOSED OUTSIDE SURFACE OF THE SHELL SO AS TO BE IN HEAT CONDUCTIVE CONTACT THEREWITH AND WHICH COMPRISES A CONTINUOUS SPONGE-LIKE MATRIX THAT IS DIRECTLY AFFIXED TO SUCH SURFACE AND SUBSTANTIALLY FILLED OUT WITH AN UNCOMBINED COOLANT METAL WHICH LIES EMBEDDED IN THE VOIDS OF THE MATRIX IN A SOLIDIFIED STATE AT ORDINARY TEMPERATURES, BUT WHICH FUSES IN HYPERSONIC FLIGHT SO AS TO WET THE SHELL AND TO COOL THE SAME BY VAPORIZING INTO THE AMBIENT SURROUNDINGS FROM THE EXPOSED FACE OF THE MATRIX, AND AN OUTER CONVERING THAT IS SUPERPOSED ON THE EXPOSED FACE TO THE MATRIX AND FORMED FROM A MATERIAL WHICH IS HEAT-DISSIPATIVE UNDER THE AERODYNAMIC CONDITIONS OF PROLONGED HYPERSONIC FLIGHT, BUT WHICH ABSORBS SUFFICIENT HEAT, WITHOUT SUBSTANTIAL DISSIPATION, DURING SHORT-TERM EXPOSURE TO AERODYNAMIC HEATING, TO PREVENT SUBSTANTIAL VAPORIZATION OF THE COOLANT METAL FOR THE LENGTH OF SUCH TERM.