Abstract: An electrical bushing of a gas insulated electrical apparatus comprises an insulating tube, a central conductor extending through the insulating tube and a cylindrical shield disposed between the central conductor which is electrically connectable to ground at one end and has an electrical field moderating ring integrally formed therewith at the other end thereof. The central conductor has a reduced diameter portion in the vicinity of the electric field moderating ring of the cylindrical shield and large diameter portions and tapered portions connecting the reduced diameter portion to the large diameter portions. Thus, since the reduced diameter portion is formed in a region where the electric field strength is high, the concentration of the electric field in that region is moderated, thereby resulting in an improvement in the withstand voltage characteristic of the bushing. The reduced diameter portion can be formed as a separate member.

Abstract: A wire entrance fitting for eliminating leakage through a side wall of a tank has a tubular member which is externally threaded at opposed ends. Plural, threaded members are received in the tubular member and extend through an encapsulating, generally inert material. A first end of the threaded members receives an exposed wire from a cathodic protection system positioned in the tank for inhibiting corrosion, is crimped thereto, and sealingly encapsulated by a resinous material. A second end of the threaded members extends outwardly from the tank for connection to an external power supply. A flange is disposed along the tubular member and extends outwardly therefrom. The flange facilitates receipt of a junction box in one arrangement and positions an elastomeric seal member along an inner face of the tank side wall in a second arrangement.

Abstract: A weight is installed in a vertical plane above a subject line. Gravity pulls the weight to an initial angle of about 140 degrees from the starting plane and thereby twists the line. The twist angle remains fixed so long as no gallop occurs. During galloping motion of the line, the initial twist is decreased as the line approaches the peak of motion and reinduced as the line leaves the peak. The line correspondingly rotates between zero degrees added twist and beyond about 140 degrees, the initial added twist angle. The rotation of the line continuously changes the profile of the air foil of the line formed by ice frozen about the line, and thereby dampens air lift and galloping of the line. The weight is attached to the line by a grip and a pair of brackets secured to the grip at one end and fitted through a slot in the weight at opposite ends.

Abstract: An optical telephone wire comprising an optical conductor having a first covering of rectangular cross-section and a messenger cable having a second covering of rectangular cross-section with one set of sides of the two sets of parallel sides of the second covering being longer than one set of sides of the two sets of parallel sides of the first covering and with the first and second coverings being integrally juxtaposed along their longitudinal axes so that one side of the other set of parallel sides of each of the coverings forms together a common surface and one side of the one set of two sets of parallel sides of each of the coverings are offset from each other in a step like manner.

Abstract: An electrical bushing for use with a gas insulated electrical apparatus comprises an insulating tube, a central conductor extending through said insulating tube, a grounded cylindrical shield disposed between the central conductor and the insulating tube, an intermediate shield disposed between, and electrically insulated from, the cylindrical shield and the central conductor so as to surround the latter. The intermediate shield has a reduced diameter portion in the vicinity of the free end of the grounded cylindrical shield, large diameter portions and tapered portions connecting the reduced diameter portion to the large diameter portions to provide a smooth distribution of the electric field between the central conductor and the field moderating ring, so that the concentration of the electric field is moderated by the grounded shield and the intermediate shield.

Abstract: An electric fence wire insulator is formed as an integral, one-piece body of non-conductive synthetic resin and includes a transverse spark shield from which extends in one direction a pair of laterally spaced main legs terminating in a pair of laterally spaced feet configured to abut the arcuate or flat surface of a wooden or metal fence post. Openings through the feet receive nails or screws by which to secure the feet to the fence post. Projecting in the opposite direction from the spark shield are five laterally spaced fingers provided with inwardly facing arcuate grooves which are aligned transversely for the reception of an electric fence wire. Laterally spaced secondary legs inwardly of the main legs are shaped to provide two pairs of split circular retainers of different diameters for the frictional retention of different size rod type fence posts.

Abstract: A closure and method for protecting a splice connecting at least two cables. The closure includes a flexible reservoir positioned around the splice, a curable liquid sealant introduced into the reservoir, a means applied to the reservoir for increasing the pressure therein and a pressure measuring tube communicating between the inside and outside of the reservoir.

Abstract: A coaxial-line section includes an outer conductor and an inner conductor tube centered coaxially inside the outer conductor and contacted by couplings which are supported by insulators or beads. The couplings are provided at their facing ends with a ring of laminated springs which allow the thermal expansion of the inner conductor tube. Extending inside along the inner conductor tube are two preferably bar-shaped displacement compensating elements. The axial inner end of each displacement compensating element is firmly anchored to the inner conductor tube while its axial outer free end defines with the end faces of the respective coupling a stop face.

Abstract: A lightning conductor having an electrically conductive surface element insulated from an earth rod. The surface element is substantially continuous, but has an aperture defining an air gap. The air gap is located near the top of the earth rod. In atmospheric conditions existing before lightning discharges, arcing occurs between the surface element and the earth rod. This creates plasma about the tip of the earth rod, leading to upward leader formation. A high impedance static drain may be connected between the surface element and the earth rod.

Abstract: A method for making an electrical bushing having an enlarged intermediate portion and reduced portions at opposite ends. The method is characterized by the steps of mounting an annular flange around one of the reduced portions to form a peripheral gutter adjacent to the one portion, mounting a cap on the other of the reduced portions to form a peripheral gutter adjacent to the other portion, placing a solid solder ring in each gutter, and with the open sides of the gutters upright, heating the solder rings to a molten temperature and cooling the molten solder to below its melting temperature in order to provide a joint between the flange and the one portion and the cap and the other portion.

Abstract: A high-voltage electric cable termination comprises a cable having a conductive central core terminating ia a bared end, a semiconductive substance covering the core, an insulative envelope, and an equipotential screen and a protective outer sheath that are terminated at a distance from the end of the cable to bare a predetermined length of the insulative envelope. At least one layer of high permittivity material extends over at least part of the length of the bared insulative envelope. An outer protective tube of insulative material extends over substantially all of the length of the termination. A set of stiffener rods of an insulative composite material inside the tube extend parallel to the axis of the termination. A filler material intimately fills the spaces between the rods and between the high permittivity material layer and the tube.

Abstract: The invention relates to undersea cable transmission links including submerged repeaters, and more particularly it relates to a housing for such a repeater. The repeater housing includes a very rigid, watertight metal box (12) coated with an external polyethylene sheath (124, 125, 126) preventing the box from coming into contact with sea water, and electrically isolating it from the sea environment. The coated box is placed in a tubular casing (10) which is very strong in traction. The repeater includes a metal sleeve (130) placed inside the tubular casing (10) over the outer sheath of the metal box (12) and provided with studs (11) passing through the tubular casing (10) via suitable openings. The sleeve reduces the thermal resistance of the housing by short circuiting the thermal resistance of the tubular casing to a considerable extent.

Abstract: Rigid electrical insulator including a soda-lime glass dielectric with an average thickness of 10 to 15 mm, exhibiting a substantially parabolic stress curve, wherein the maximum value of the surface compression stresses at any point in the part falls within the range of 30 to 80 MPa, while the maximum value of the internal tensile stresses at any point in the part falls within the range of 15 to 40 MPa.

Abstract: Fence wires for the confinement of stock animals, zoo animals or wild animals have an electrically conductive synthetic plastic sheath and a tension resisting core which is made of either a textile material or a fence wire. The sheath is rendered conductive by the incorporation of amino compounds which are vulcanized with the chloropolymers of the sheath material, by the incorporation of metallic hairs or conductive plasticizers.

Abstract: A mechanical fuse for a cable connection tail of a submarine repeater in a cable transmission link, said cable connection tail extending from a case for repeater equipment, having a "free" end for connection to the head of a line cable fixed to the repeater when the link is laid, and including a tube which encloses the transmission-providing elements. The mechanical fuse comprises a plug (40) threaded over and fixed to the end of the tube (30) at the free end of the cable connection tail, a ring (41) fitted over the plug (40) and free to escape from the plug (40) in a direction running away from the cable connection tail, and mechanically fixed to the cable head, and a set of pins (42) transversely connecting the ring (41) to the plug (40) and having a cumulative shear strength which is less than the breaking strength of the tube of the cable connection tail.

Abstract: A dynamoelectric machine has a frame to which an accessories conduit assembly is secured, and a plurality of electrically discrete compartments in such assembly has terminal blocks therein only of a predetermined electrical characteristic. A power conduit assembly is releasably attached to the frame to adjustably dispose an aperture in such assembly for receiving power leads in a plurality of preselected positions.A method of rearranging the position of a rotatable assembly in a frame of a dynamoelectric machine is also disclosed.

Abstract: An anti-short bushing, for use between a tubular metal sheath and an electrical conductor carried within the metal sheath, comprising a tubular insulative unit configured to be inserted between the sheath and the conductor. The tubular insulative unit is formed as a single molded piece having three connected segments. Two of the segments are generally semi-cylindrical and each has a shoulder projecting radially therefrom at one end. The two segments are connected by an elongated hinge which permits them to be folded relative to one another to form a tubular configuration with their shoulders forming a partial circumferential shoulder. The third segment is connected to the elongated hinge by a second hinge to permit the third segment to be rotated to project radially outwardly so as to form with the two shoulders of the other two segments a complete circumferential shoulder.

Abstract: A high performance, high voltage electrical insulator, for use at greater than 15 Kv in wet, contaminated conditions, is designed to give a minimum surface area while maintaining a low leakage current by specifying the ratios of shed diameter to shed pitch, leakage distance between support fittings to the straight line distance between support fittings, and the shed diameter to the support rod diameter. Through the use of specified silicone elastomeric compositions, or through the use of silicone compositions meeting specified electrical properties, an insulator meeting the design specifications is shown to be a useful high voltage insulator.

Abstract: A flexing connector for suppressing electromagnetic radiation from an electrical cable connecting moving and stationary elements of a machine has a shield surrounding a signal cable which includes an inner coil of wire wound in a generally helicoidal form with a flat cross-section with the signal cable positioned within the coil. An outer coil similar to the first, but with somewhat larger cross-section and wound with a different chirality, surrounds the inner coil. The coils are made from hardened steel, which is both electrically conductive and ferromagnetic. The two coils and the cable are clamped together on either side of a moving loop extending between the moving and stationary elements so that the coils cannot elongate and spread their windings apart as the connector is flexed.

Abstract: A broken conductor guard system for a single neutral power distribution system in which at least one high voltage power conductor is suspended between power poles with a neutral conductor being similarly suspended between the poles vertically below the high voltage conductor includes a broken conductor guard comprising an elongated rod with hook-shaped ends clamped with a clamping mechanism to a single neutral conductor in a horizontal plane and transverse to the neutral conductor. Apparatus is coupled to the clamping mechanism for preventing rotation of the broken conductor guard about the neutral conductor so as to maintain the guard in the horizontal plane.