Abstract: A by-pass device, adapted to be connected between lengths of cable through which fluid is being passed and electric current is being conducted, and a piece of electrical equipment through which the electric current is to be connected, which permits the fluid being conveyed to by-pass the piece of electrical equipment includes: a first member and a second member, each of the members being fittings composed of an electricity-and-fluid passage section adapted to be connected to a cable; an electricity passage section adapted to be connected to a piece of electrical equipment; and a fluid conveying section adapted to convey fluid in a divergent path away from the current of electricity; and a conduit connecting each of the fluid conveying sections so as to permit the fluid flow between the fluid conveying sections of each member to by-pass the electrical device without interrupting the circuit of electric current.

Abstract: A by-pass device, adapted to be connected between lengths of cable through which fluid is being passed and electric current is being conducted, and a piece of electrical equipment through which the electric current is to be conducted, which permits the fluid being conveyed to by-pass the piece of electrical equipment includes: a first member and a second member, each of the members being fittings composed of an electricity-and-fluid passage section adapted to be connected to a cable; an electricity passage section adapted to be connected to a piece of electrical equipment; and a fluid conveying section adapted to convey fluid in a divergent path away from the current of electricity; and a conduit connecting each of the fluid conveying sections so as to permit the fluid flow between the fluid conveying sections of each member to by-pass the electrical device without interrupting the circuit of electric current.

Abstract: Voltage stress control cones for high voltage cable terminations are produced by premolding and radially expanding to mechanically prestress. The mechanically prestressed premolded cone is slipped over the insulation of a cable end and heat relaxed to shrink tightly over the cable. The cone is fabricated from cross-linkable polyethylene or other cross-linkable polymeric material having substantially the same electrical and thermal characteristics as the cross-linked polymeric insulation of the cable. A semiconductive layer of cross-linked polymeric material provides the transition between the insulation of the cone and the semiconductive insulation shield of the cable.

Abstract: This cable for high-voltage, alternating current power transmission cables not only reduces the access of moisture into the cable but reduces access of moisture to the inner face of the insulation to such an extent as to make the cable highly resistant to the formation of electrochemical trees in the solid extruded insulation of the cable. A compressible layer of closed cell, foamed plastic is extruded over the outside surface of the insulation; and a metallic shield fits tightly around the compressible layer, the metallic shield being a longitudinally folded tape with a lap seam which is preferably bonded to prevent ingress of air or other fluid into the cable. If the conductor is stranded, sealant is used to prevent ingress of moisture, or of air, and the humidity it contains into the cable at cable ends.

Abstract: High-voltage power cables with extruded dielectric plastic insulation, installed underground, have their life shortened by the formation of electrochemical trees in the insulation. This invention provides a high-voltage power transmission cable constructed with sealant in interstices of a stranded conductor that are not filled by the semi-conducting material of a conductor shield of the cable. The construction prevents or greatly delays the formation of electrochemical trees in the insulation of the cable. The sealant prevents entrance of air into the cable at cable ends, and the passage of the humidity of the air through the conductor shield to an interface between the conductor shield and the inside surface of insulation that surrounds the conductor shield.

Abstract: This apparatus is for evaluation installed cable systems, including those that are already in use. The apparatus measures dissipation factor, partial discharge (corona) and insulation resistance of the cable system; all of these being necessary to determine the condition of the cables. This invention is unique, in that it can be used with installed cable systems that have their metallic shielding grounded; and the apparatus can be mounted on a truck or trailer for movement to any place where an installed system is to be evaluated.

Abstract: This improved stop joint is used at connections of one length of electric cable to another, for the purpose of preventing fluid in one length of cable from contacting fluid in the next length of cable. The joint includes a stop tube that surrounds the end portion of one length of cable and that is made with a mid-portion of resin base material, preferably reinforced, and end portions of metal connected to the resin base material by fluid-tight connections. These metal end portions are secured to the pipe or shield that surrounds one or both of the lengths of cable. Parts are constructed so as to minimize the time and cost of making the connections between the cable lengths and the connecting of the stop joint with the pipe or shield that surrounds the respective cables.

Abstract: Electrical cables that carry higher voltage require insulation of greater thickness. This invention extrudes the insulation over a cable core and extrudes it in superimposed layers which fuse to one another to prevent formation of voids within the insulation. The insulation applied in each superimposed layer increases the impulse breakdown stress in volts per mil of insulation thickness. A high voltage cable for any given voltage can, therefore, have a thinner insulation if the insulation is applied in layers according to this invention instead of being applied in a single layer in accordance with the practice of the prior art.

Abstract: Extruded dielectric power cables installed underground have their life shortened by the formation of electrochemical trees in the insulation. Tree formation can be prevented if the insulation is initially dry and the cable construction is such that moisture cannot gain access to the insulation under operating conditions encountered during installation and underground use. This invention eliminates initial moisture and has a construction that greatly retards ingress of moisture to the insulation during installation when the cable is in service and prevents longitudinal movement of water along the cable due to accidental damage to the cable or electrical failure.

Abstract: This invention carries a power cable from a floating power plant to a fixed connection from which the power cable can transmit to a distributing system on shore. The cable support distributes the bending of the cable over a length of cable so that no deterioration of the cable occurs as the result of successive bending and unbending with the tidal motion of the floating power plant. A jointed cover protects the cable support from exposure to the weather and from icing.