Method for exothermic brazing of metal joints

Claim 1

THE METHOD OF BRAZING TWO METAL SURFACES TOGETHER WHICH COMPRISES PRE-PLACING AT THE METAL SURFACES A BRAZING MATERIAL HAVING A MELTING POINT LOWER THAN THAT OF THE METAL WHICH FORMS THE SURFACES AND HIGHER THAN 900*F., SELECTED FROM THE GROUP CONSISTING OF NON-FERROUS METALS AND ALLOYS THEREOF, PRE-PLACING ADJACENT TO, AND IN HEAT TRANSFER RELATION TO, AND PHYSICALLY SEPARATED, BY, A SOLID BARRIER FROM, THE BRAZING MATERIAL, SOLID REACTANT MATERIALS WHICH ARE FROM THE GROUP CONSISTING OF THOSE WHICH, WHEN HEATED TO A TEMPERATURE BELOW THE BRAZING TEMPERATURE REACT WITH EACH OTHER AND EVOLVE, BY AN OXIDE REDUCTION PROCESS WHEREIN NO GASEOUS OXYGEN IS EVOLVED, SAID MATERIALS BEING A MIXTURE SELECTED FROM THE GROUP CONSISTING OF AT LEAST ONE METAL OXIDE AND AT LEAST ONE MATERIAL TAKEN FROM THE GROUP CONSISTING OF METALS AND METAL HYDRIDES, HEAT AT SUFFICIENT TEMPERATURE AND IN SUFFICIENT AMOUNT TO MELT AND FLOW THE BRAZING MATERIAL, WHICH REACTANT MATERIALS, WHEN REACTING ARE NONGAS FORMING, AND THEN HEATING THE MATERIALS TO SAID LOW TEMPERATURE TO INITIATE SAID REACTION, AND THEN MAINTAINING THE PHYSICAL SEPARATION OF THE REACTANT MATERIALS AND BRAZING MATERIAL THROUGHOUT THE ENTIRE REACTION SAID BARRIER COMPRISING ONE OF SAID TWO METAL SURFACES.

Claim 2

THE METHOD OF BRAZING TWO METAL SURFACES TOGETHER WHICH COMPRISES PRE-PLACING AT THE METAL SURFACES A BRAZING MATERIAL HAVING A MELTING POINT LOWER THAN THAT OF THE METAL WHICH FORMS THE SURFACES AND HIGHER THAN 900*F., SELECTED FROM THE GROUP CONSISTING OF NON-FERROUS METALS AND ALLOYS THEREOF, PRE-PLACING ADJACENT TO, AND IN HEAT TRANSFER RELATION TO, AND PHYSICALLY SEPARATED, BY, A SOLID BARRIER FROM, THE BRAZING MATERIAL, SOLID REACTANT MATERIALS WHICH ARE FROM THE GROUP CONSISTING OF THOSE WHICH, WHEN HEATED TO A TEMPERATURE BELOW THE BRAZING TEMPERATURE REACT WITH EACH OTHER AND EVOLVE, BY AN OXIDE REDUCTION PROCESS WHEREIN NO GASEOUS OXYGEN IS EVOLVED, SAID MATERIALS BEING A MIXTURE SELECTED FROM THE GROUP CONSISTING OF AT LEAST ONE METAL OXIDE AND AT LEAST ONE MATERIAL TAKEN FROM THE GROUP CONSISTING OF METALS AND METAL HYDRIDES, HEAT AT SUFFICIENT TEMPERATURE AND IN SUFFICIENT AMOUNT TO MELT AND FLOW THE BRAZING MATERIAL, WHICH REACTANT MATERIALS, WHEN REACTING ARE NONGAS FORMING, AND THEN HEATING THE MATERIALS TO SAID LOW TEMPERATURE TO INITIATE SAID REACTION, AND THEN MAINTAINING THE PHYSICAL SEPARATION OF THE REACTANT MATERIALS AND BRAZING MATERIAL THROUGHOUT THE ENTIRE REACTION SAID BARRIER COMPRISING ONE OF SAID TWO METAL SURFACES.