Brazing method and composition

Claim 1

IN A METHOD OF BONDING TOGETHER TWO METAL BODIES, AT LEAST ONE OF WHICH HAS A ZONE OF RELATIVELY HIGH SURFACE RATIO CONTIGUOUS WITH THE REGION WHERE SAID BODIES ARE TO BE JOINED, BY BRINGING SAID BODIES TOGETHER TO PROVIDE A JOINT, APPLYING MOLTEN BRAZING MATERIAL TO SAID JOINT AND SOLIDIFYING THE SAME, THE IMPROVEMENT WHEREBY ANY SUBSTANTIAL FLOW OF MOLTEN BRAZING MATERIAL FROM SAID JOINT INTO SAID ZONE OF RELATIVELY HIGH SURFACE RATIO IS AVOIDED, SAID IMPROVEMENT INCLUDING THE STEPS OF: SELECTING A BRAZING MATERIAL WHICH WHEN MELTED IN CONTACT WITH THE METAL CONSTITUTING SAID ZONE PROGRESSIVELY ALLOYS THEREWITH WITH PROGRESSIVE RISE IN MELTING POINT AT A RATE DETERMINED BY THE SURFACE RATIO, SAID RATE BEING RELATIVELY LOW AT UNIT SURFACE RATIO AND INCREASING AS THE SURFACE RATIO INCREASES; APPLYING THE SELECTED BRAZING MATERIAL TO THE JOINT BETWEEN THE TWO BODIES; APPLYING HEAT TO THE TWO BODIES TO RAISE THE TEMPERATURE OF THE BRAZING MATERIAL TO A POINT ABOVE BUT RELATIVELY CLOSE TO ITS MELTING POINT WITH CONSEQUENT MELTING THEREOF; DISCONTINUING THE APPLICATION OF HEAT AT THIS POINT WHEREBY THE MOLTEN BRAZING MATERIAL REMAINS LIQUID LONG ENOUGH AT THE JOINT TO BOND THE TWO BODIES TOGETHER WHILE MOLTEN BRAZING MATERIAL FLOWING INTO SAID CONITGUOUS ZONE SOLIDIFIES PROMPTLY BY ALLOYING WITH THE METAL IN SAID ZONE THEREBY STOPPING THE FLOW OF MOLTEN BRAZNG MATERIAL FROM SAID JOINT.