Composite aluminum electrical conductor cable

Claim 1

IN A MULTI-STRAND CONDUCTOR ADAPTABLE FOR ELECTRICAL POWER TRANSMISSION, THE COMBINATION OF A PLURALITY OF CORE STRANDS AND A PLURALITY OF OUTER CONDUCTOR STRANDS, SAID OUTER CONDUCTOR STRANDS CONSISTING OF AN ELECTRICALLY CONDUCTIVE GRADE OF ALUMINUM AND THE CORE STRANDS CONSISTING OF THE ELEMENTS, IN PERCENT BY WEIGHT, COPPER UP TO 0.01%, IRON UP TO 0.50%, MANGANESE UP TO 0.03%, ZINC UP TO 0.10%, CHROMIUM UP TO 0.03%, BORON UP TO 0.06%, SILICON ABOUT 0.50% TO 0.90%, MAGNESIUM ABOUT 0.60% TO 0.90%, AND THE BALANCE ALUMINUM AND HAVING AN ELECTRICAL CONDUCTIVITY OF AT LEAST 52 1/2%, SAID CONDUCTIVITY PERCENTAGE BASED ON AN EQUAL VOLUME OF THE INTERNATIONAL ANNEALED COPPER STANDARD, THE CORE STRANDS HAVING RELATIVELY GREATER STENGTH AND GREATER ELONGATION THAN SAID OUTER CONDUCTOR STRANDS AND THE COEFFICIENT OF EXPANSION, AND CORROSION RESISTANCE OF THE OUTER CONDUCTOR STRANDS AND THE CORE STRANDS BEING SUBSTANTIALLY THE SAME.