Aluminum clad electric conductor wire

Claim 1

A COMPOSITE WIRE COMPRISING: A FERROUS METAL CORE OF UNBROKEN SPOOL LENGTH AND OF PREDETERMINED TENSILE STRENGTH; A THIN, DISCRETE, EFFECTIVELY CONTINUOUS COATING IN DIRECT AND UNINTERRUPTED CONTACT WITH SAID CORE, SAID COATING BEING OF A METAL SELECTED FROM THE GROUP CONSISTING OF COPPER AND NICKEL; AND A SMOOTH RELATIVELY THICK, SUBSTANTIALLY CONCENTRIC DISCRETE SHEATH OF HIGH ELECTRICAL CONDUCTIVITY ALUMINUM FIRMLY BONDED IN DIRECT AND UNINTERRUPTED CONTACT WITH SAID ENTIRE COATING, SAID ENTIRE SHEATH BEING OF SUBSTANTIALLY UNIFORM COMPOSITION THROUGHOUT, AND BEING EFFECTIVELY FREE OF CONTAIMINANTS FROM SAID CORE AND EFFECTIVELY FREE OF CONTAMINANTS FROM SAID COATING, SAID SHEATH HAVING AN ELECTRICAL CONDUCTIVITY IN THE COMPOSITE WIRE WHICH IS SUBSTANTIALLY EQUAL TO THAT OF THE SHEATH MATERIAL BEFORE BONDING, AND SAID COMPOSITE WIRE BEING CAPABLE OF BEING FRAWN IN A CONVENTIONAL MANNER WITHOUT DAMAGING THE BOND BETWEEN THE CORE AND THE COATING AND WITHOUT DAMAGING THE BOND BETWEEN THE COATING AND THE SHEATH.