Electrolytic reduction cell for producing aluminum

Claim 1

AN ELECTROLYTIC CELL FOR PRODUCING ALUMINUM FROM ITS OXIDE WHICH COMPRISES A SUBSTANTIALLY RECTANGULAR OPEN TOP SHELL HAVING ITS SIDE WALLS AND BOTTOM LINED WITH AN INSULATING MATERIAL AND AN ELECTRICALLY-CONDUCTIVE LINING SUPPORTED ON THE BOTTOM INSULATING MATERIAL TO PROVIDE A CELL CAVITY FOR CONFINING A CHARGE OF FUSED ELECTROLYTE AND UNDERLYING MOLTEN ALUMINUM POOL, AN ANODE DEPENDING DOWNWARDLY INTO THE CELL CAVITY AND LATERALLY SPACED INWARDLY FROM THE SIDE WALLS OF THE CELL CAVITY, A CATHODE CURRENT-COLLECTOR SYSTEM COMPRISES A SUBSTANTIALLY HORIZONTAL CATHODE BUS BAR DISPOSED EXTERIOR TO AND ADJACENT EACH OF TWO OPPOSITELY DISPOSED SIDE WALLS OF THE SHELL PARALLEL TO THE LONG AXIS OF THE CELL CAVITY, SPACED CATHODE COLLECTOR BARS EMBEDDED IN THE ELECTRICALLY-CONDUCTIVE BOTTOM LINING IN PARALLEL DISPOSITION IN RESPECT TO THE BOTTOM SURFACES AREA OF THE ANODE, SAID EMBEDDED CATHODE COLLECTOR BARS EACH HAVING CURRENT-COLLECTING LENGTHS DISPOSED WITHIN AND BELOW THE TOP SURFACE OF THE ELECTRICALLYCONDUCTIVE BOTTOM LINING AND CONFINED TO SUBSTANTIALLY THE DOWNWARDLY PROJECTED AREA OF THE ANODE ABOVE THE SAME, AND AN ELECTRICAL CONDUCTOR FOR EACH EMBEDDED CATHODE COLLECTOR BAR CONNECTING ITS RESPECTIVE CATHODE COLLECTOR BAR TO ONE OF THE EXTERIOR CATHODE BUS BARS, EACH ELECTRICAL CONDUCTOR EXTENDING DOWNWARDLY FROM ITS RESPECTIVE CATHODE EOLLECTOR BAR WITHIN THE DOWNWARDLY PROJECTED AREA PF THE ANODE INTO THE INSUALATING MATERIALL BELOW THE BOTTOM ELECTRICALLY-CONDUCTIVE LINING AND OUTWARDLY THROUGH THE SAID INSULATING MATERIAL IN ITS ELEC TRICAL CONNECTION WITH ONE OF THE EXTERIOR CATHODE BUS BARS.