Abstract: Lightweight electroconductive wire which includes a strip of lithium metal with copper connectors at each end, and encapsulated within a layer of moisture proof aluminum foil, which has an anhydrous glue coating with an outer encapsulating layer of insulating plastic tape that has a coating of adhesive retaining it on the foil. The copper contacts extend outside the layer of tape and are plated with metal that is non reactive with lithium at contact with the lithium.

Abstract: A way to evacuate all moisture and air and then pressurize with SF.sub.6 gas, a cable and conduit system used for electrical power distribution and transmission lines, by fabricating a termination at each end. A termination is made up of a first end plate with a hole slightly larger than the conduit and sealed around the hole to the conduit. For a single phase cable, one electrical terminal is sealed as it goes through the first end plate and is connected to the neutral conductor. A second electrical terminal is sealed as it goes through a second end plate and is connected to the conductor. An enlarged conduit is spaced between these two end plates and is sealed to, the two end plates. A tire valve is installed in one end plate. A hole to fit a pipe nipple is made at the top of the enlarged conduit of one termination. A vacuum pump is connected to a pipe nipple screwed into the hole and the termination evacuated. SF.sub.

Abstract: This invention relates to a new method for manufacturing a SF.sub.6 pressurized gas continuous spacer cable, and improvements which reduce costs and improve quality control of high voltage cables. The conductor is passed through taping machines for surrounding the conductor with a continuous insulating spacer and through taping machines for applying a conducting shielding material which partially covers the spacer. The insulated and shielded cable is continued on in the same production line into conduit which is laid out horizontal in long lengths or is extruded loose-fit over the cable. The cable is then subjected to vacuum while in the conduit. Terminations are applied. Seals are tested for leaks. The cable is filled with SF.sub.6 gas to a high pressure. The cable is tested at 1.5 times its operating voltage to ground for 30 minutes without failure.

Abstract: The inner conductor of a gas filled high voltage cable is of composite construction in that a core of alkali-metal, an alloy thereof or two or more alkali-metals, are arranged in a thermoplastic or elastomeric cover which, in turn, is contained in a corrugated metal tube. The outer conductor and spacers are conventional.

Abstract: A corrugated flexible thin copper tube filled with sodium has a resilient flexible core along the axis thereof so arranged that it will contract and expand to take up the force of thermal expansion and contraction of the sodium. Since the coefficients of expansion of the sodium and copper are different, the absorption of this differential in force by the core prevents rupture of the copper tube and the formation of voids and hot spots within the copper tube.