Abstract: An insulator including an upper electrode and a lower electrode with an upper barrier and a lower barrier disposed outside respectively. The barriers can prevent moving charge from moving from one area to another and modify the electric field distribution within a concentrated area. Meanwhile, they also help to largely increase corona voltage and flashover voltage, reduce power loss in HV power transmission lines and radio interference, and mitigate degradation of insulators.

Abstract: A screwing control device of a computer chassis is composed of a computer chassis, a panel of which is pre-built with a plurality of positioning holes; a screw element, a center of which is provided with a screw hole and which is able to be locked and fixed into one of the positioning holes; and a bolt, which is transfixed into a through-hole of a board element, and is then screwed into the screw hole of the screw element. Therefore, a quantity of the screw elements which are actually used for screwing can be effectively controlled, and pre-built projected bolts which are not necessarily used for screwing can be eliminated.

Abstract: A method of providing a shed (2) for a high-voltage insulator (1) includes providing a substantially tubular substrate (3), providing an extruder (10) having an extruder head (11) defining an extrusion direction (A), using the extruder (10) to extrude the shed (2) and applying the shed (2) on the substrate (3) while rotating the substrate relative to the extruder head (11). The extrusion direction (A) substantially coincides with the longitudinal axis of the substrate (3), and the substrate (3) is fed through the extruder head (11).

Abstract: An insulator having a torque-resistant or torque-prevailing crimped insulator end fitting; including a method of crimping the insulator end fitting so as to be resistant to torque tending to loosen mounting bolt connections of the insulator. A fiberglass core is located in the insulator and protrudes from the opposite ends of the insulator, and has end fittings seated thereon in close interference engagement, by mounting the insulator through intermediary of the end fittings being attached to power devices by threaded bolts extending from the devices being engaged in the tapped bolt holes. Radially inwardly directed crimping forces are applied to the cylindrical wall structure of the end fittings intermediate the locations of the bosses having the bolts tightened within the threaded bolt holes, and thereby produce a bolt-locking deformation of the bolt holes.

Abstract: An electric high-voltage insulator made from plastic comprises at least one glass fiber rod (1), at least one shield covering (2) made from silicone rubber which surrounds the glass fiber rod (1) and has concentric bulges (3) arranged along the longitudinal axis and bent in the shape of sheds in such a way that they form a convex top side and a concave or flat underside, as well as metal fittings (5) on both insulator ends. In this case, the bulges bent in the shape of sheds have at least one groove (4) on the underside preferably with a minimum depth of 1 mm.

Abstract: An insulator in the form of suspension insulator or pin type insulator has an elongated load sustaining body with a plurality of weathersheds extending radially relative to the longitudinal axis of the body on the outer surface of the body. The body and weathersheds are unitarily formed as one piece of rigid dielectric plastic polymer which are molded together. Clevis and eye coupling means are provided on the ends of the body to facilitate connection to support structures and high voltage lines.

Abstract: The invention relates to a high voltage insulator of ceramic material, which includes a longitudinal shank having molded sheds and to whose ends of the shank metal caps are shrink-fitted. The ends of the longitudinal shank are enlarged so that the diameter of the enlarged ends is at least 1.05 times the diameter of the longitudinal shank. The cylindrical surface, and the end face of the enlarged ends of the longitudinal shank are machined.

Abstract: An electrical insulator includes a pair of endpieces fixed respectively to opposite ends of a cylindrical support. Extruded elastomer insulation material forms annular fins about the support. Each end of the support is inserted into a tubular housing provided in each endpiece. The fins cover a transition surface of tapering shape elastomer rings joining the outside surface of an endpiece to an outside surface of the support. A tapering ring of extruded elastomer material of triangular cross-section backs up against a shoulder of a respective endpiece at the opening to the housing into which the end of the support is inserted. The transition surface is defined by the exterior of the tapering ring.

Abstract: An insulating assembly for an overhead power line has a main subassembly formed of two parallel spaced insulators joined at their ends by aluminum end pieces. The end pieces each have a slot aligned with the space between the two insulators and a rod projecting from the end piece in alignment with the slot but below the slot. This arrangement enables the subassembly to be hung on a hot power line with the line passing along the slots and the space between the insulators. The rods may be clamped to the line by any suitable device such as wedges and C-shaped clamps. With the subassembly thus mechanically and electrically connected securely to the line, the line can be severed at a location between the end pieces and the free ends forced apart.

Abstract: A method for forming an fixing end portion of a composite rope comprises the steps of mounting a mold on an end portion of the rope, pouring a molten metal in a cavity defined between the end portion of the rope and the mold under pressure, covering a predetermined part of the end portion of the rope with a cast metal formed from the molten metal, cold-pressing the cast metal and fixing the portion coated with the cast metal to a fixing member.

Abstract: An electrode device including an insulating body, at least one conductor mounted on the insulating body, and an insulating member mounted on the conductor and supporting high voltage slip-ring electrodes to which high voltages are applied.

Abstract: A stand-off device for supporting an energized conductor from a utility pole includes an elongated self-supporting stand-off body, a utility pole connecting arm extending from the elongated body at one end for connection to a utility pole, and an energized conductor contact arm fastened to an opposite end of the elongated body. When the utility pole connecting arm is mounted or connected to a utility pole, the energized conductor contact arm at the other end of the elongated body contacts and supports an energized conductor in a stand-off position from the utility pole.

Abstract: An improved, integrally cast, synthetic resin insulator (22) especially adapted for use in an electrical cutout device (20) is provided which can be readily fabricated and gives greatly enhanced beam strength and arc track resistance characteristics. The preferred insulator (22) is cast using an epoxy resin such as bisphenol A filled with a relatively large quantity of glass beads and hydrated alumina. The filler fraction contributes to lowered viscosity, deaerability and improved settling properties while the resin is in an uncured state, and moreover enhances the arc track resistance and mechanical strength of the resin system after curing. The preferred insulator (22) is cast to present a longitudinal bow giving the insulator (22) an arcuate central axis. Further, the periphery of the insulator (22) is formed with a series of superposed, generally oval-shaped in cross-section, outwardly flaring skirts (30) interconnected by smooth transition regions (32) free of stress-inducing sharp corners.

Abstract: A method of constructing a filament support member from a single-piece preformed refractory metal wire having at least one loop protrusion formed in the wire and positioned between the ends of the wire. A section of glass tubing is positioned over and supported by the loop protrusion with a head portion of the loop extending beyond the section of tubing. Heat is applied to melt the section of tubing to form an insulating bead at the base of said loop protrusion. The head portion of the loop protrusion is then trimmed to interrupt electrical continuity in the wire and thus electrically isolate the respective ends of the wire.

Abstract: A method and apparatus for isolating electric power lines includes an insulator assembly to which is pivotally connected two line clamps. After the clamps clamp to the wire, the wire is cut so that the insulator isolates the line. In one form the clamping surfaces are curved in the longitudinal direction to make up for the loss of line length due to the elongation of the assembly under line tension. Cut-out assemblies for fuse and disconnect purposes are readily applied to the assembly by a lineman standing on the ground below.

Abstract: In a high-voltage-conducting assembly (10), such as, for example, the current transducer arrangement for a high-voltage outdoor installation, measurement information items are transmitted via optical waveguides from high-voltage potential to ground potential. To reduce the voltage gradient along the optical waveguide, the latter is spirally conducted along an optical waveguide carrier (7) between the high-voltage side (9) and the ground potential side (5) of a high-voltage insulator (6). The optical waveguide support (7) can be a self-supporting plastic coil (7) or the outer layer of the insulator tube of fibre-glass-reinforced plastic of the high-voltage insulator (6) or its silicon layer applied on the outside or its silicon shield tape. In this arrangement, the surface leakage path of the optical waveguide support is greater than 1.5-times, preferably greater than 5-times the height (h) of the high-voltage insulator (6).

Abstract: An insulator support bracket embodies an elongated insulating rod-like member connected at one end to an electrically conductive metallic end fitting and connected at its other end to an electrically conductive metallic base fitting. An electrical conductor element extends longitudinally of and inwardly of the surface of the insulating rod-like member and electrically connects the end fitting to the base fitting so that any current flowing from the end fitting to the base fitting will flow through the electrical conductor element rather than along the surface of the rod-like member.

Abstract: An electric insulator which includes a rod (2) made of glass fibres and resin, one end of said rod being received in a fitting (1) made fast to a post (20). To improve the mechanical strength of the rod (2) in the anchoring means, a fitting (1) with a double cone recess is provided and the end of the rod has one or two grooves machined therein and is embedded in the recess in an organic substance (16). The grooves are formed only through the lower portion of the rod where the fibres are subjected to compression forces.

Abstract: The invention relates to an electric insulator of the line post type which has a rod (2) made of glass fibres agglomerated in resin and covered with a protective elastomer sheath. A socket (15) with an opening (16) is provided to make it fast with post (14). The socket end of the rod is machined to provide a hollow (8) designed to improve the mechanical characteristics of the rod in the fitting (1) of the post (14). A locking piece (17), which is complementary to the hollow (8) in the rod (2), clamps the assembly together by means of two fixing parts (18).

Abstract: A breaking and insulating clamp for tensioned electrical conductors is disclosed, and which comprises an elongate bar of an electrical insulating material, with the bar mounting separate clamping members at longitudinally spaced apart locations for separately securing an electrical conductor or the like at each location. This permits the conductor to be severed between the clamping members, so that the remaining portions of the severed conductor are isolated and insulated from each other. In the illustrated specific embodiment, the clamping members each include a U-shaped bolt received within mating channels in the bar so as to preclude relative longitudinal movement between the bar and the bolt, and a pair of cooperating plates mounted on the bolt. The plates are designed to be clampingly pressed together so as to securely retain an electrical conductor extending therebetween in the longitudinal direction.

Abstract: An electric precipitator has a plurality of electrodes arranged in a housing, and a knocking device for cleaning the electrodes and including a plurality of anvils connected with the electrodes, a plurality of hammers arranged on a rotary knocking shaft, a drive unit with a driving shaft, and an insulating coupling for transmitting rotation of the driving shaft to the knocking shaft, wherein the insulating coupling includes engaging members mounted on the shaft, an intermediate coupling member, and drive bushes connecting the intermediate member with the engaging members so that each drive bush has a polygonal receiving opening with rounded corners and concave connecting lines, and each engaging member has a shape corresponding to the shape of the receiving opening with a small play and engages in the receiving opening.

Abstract: An electrical isolation system is disclosed for use on sailboats having metal masts and shrouds for preventing accidental shocking or electrocution of persons who contact lower portions of the mast or shrouds and/or electrical conductors appended thereto when the top of the mast or shrouds come into contact with an electrical high voltage distribution or transmission line with the system including an insulating member separating the upper portion of the mast from a lower portion of the mast.

Abstract: A cylindrical porcelain insulator having a depressed opening in at least one end thereof is utilized as a support member. An elongated steel stud having a threaded end and an enlarged securing end is disposed in the depressed central opening of the porcelain insulator. The enlarged securing end has circumferential lateral ridges and depressions for providing an enlarged surface area. Babbit or epoxy material is disposed in the remaining volume of the depressed opening. The securing end of the stud is therefore suspended in the hardened babbit or epoxy material, which in turn is affixed to the sides of the depressed opening, thus affixing the stud to the insulator. The stud has a relatively flat circumferential lateral shoulder at the upper end thereof which protrudes above the end of the insulator and out of the depressed opening. An electrical bus bar or bus bar retaining apparatus is disposed around the threaded portion of the stud to rest on the flat shoulder in a flat surface to flat surface relationship.

Abstract: The proposed suspension insulator is intended to ensure insulated suspension of power line wires to cross-arms of power line supports.The insulator comprises two flexible, arched insulation members rigidly attached to each other, with their convex sides being on the outside, like in a spring suspension (rigging). The fittings intended for the mechanical connection of the insulator to the cross-arm of a support and for suspending the wire to the insulator are mounted in the middle of the insulation members.