Abstract: A new cross linked polyolefin material combination that is designed to replace current high-density polyethylene (“HDPE”) materials for use with molded or over-molded electrical transmission products. Such molded or over-molded electrical transmission products include, for example, vise-top pin insulators, line post insulators, F-neck, C-neck, and J-neck pin insulators of classes ANSI 55-3, 55-4, and 55-5, Spacer cable spacers, Brackets, hangers, Line post sensors, cable restraint insulators, and transmission style insulators.

Abstract: A method for joining a core member and grippers in a polymer insulator including a core member, an outer sheath comprised of a body and caps, which are provided around the core member, and the grippers provided on both ends of the core member, comprising (a) providing the core member with a filler on the outer circumferential surface thereof or the grippers with a filler on the inner circumferential surface thereof, (b) inserting the core member into the grippers, and (c) clinching the grippers to fasten the grippers and the core member.

Abstract: A tubular elastic covering (730) for electric components (700), having on the whole predetermined values of mechanical and electric/environmental requirements, in which the mechanical requirements include expandibility and elastic recovery in a radial direction, and electric/environmental requirements comprise resistance to tracking and resistance to solar radiation, characterized in that said covering includes an inner insulating layer (680) and an outer insulating layer (660) coaxial with each other, in superposed relationship and bonded together, made of blends of cross-linked polymeric material, in which the cross-linked blend forming the inner layer has predetermined values of said mechanical requirements and the cross-linked blend forming the outer layer has predetermined values of said electric/environmental requirements.

Abstract: An electrically insulating material including a continuous phase of a thermoplastic polymer and an additional phase incorporated therein of a liquid or easily meltable dielectric in the form of a wholly or partly interpenetrating network, and where the weight ratio of the polymer to dielectric is between 95:5 and 25:75.

Abstract: A method of manufacturing an electrical rod insulator for supporting an electrical conductor and comprising an insulating core obtained by molding and having a top end and a bottom end with a bore for receiving said rod in an axial direction, and covered in a molded covering having a groove for supporting said electrical conductor, wherein the core is molded in such a manner that its outside surface defines radial ribs extending along the axial direction from the top end of the core, said ribs being spaced apart from one another by a distance that is constant and substantially equal to the thickness of the core. The method makes it possible to avoid problems associated with molding large thicknesses when making a composite insulator having better mechanical and electrical properties at low cost.

Abstract: A tubular elastic covering for electric components is provided to obtain predetermined values of mechanical and electric/environmental requirements. The mechanical requirements include expandibility and elastic recovery in a radial direction. The electric/environmental requirements include resistance to tracking and resistance to solar radiation. The covering includes an inner insulating layer and an outer insulating layer coaxial with each other, in superposed relationship and bonded together. The covering is made of blends of cross-linked polymeric material, in which the cross-linked blend forming the inner layer has predetermined values of the mechanical requirements and the cross-linked blend forming the outer layer has predetermined values of the electric/environmental requirements. This invention also describes a method of making this covering, a termination for electric cables utilizing this covering, and a method of mounting the termination to an electric cable.

Abstract: A space capable of readily mounting wires having different diameters and reliably preventing displacement of the wires with a simple structure is provided. This spacer is provided with a mounting hole capable of mounting wires having different diameters, and a hook and a hook receiver are provided on opposite end surfaces of a substantially V-shaped release portion. Any wire is fixed by simply inserting the wire into the release portion for mounting the same on the mounting hole and thereafter hanging the hook on the hook receiver. Thus, wires having different diameters can be readily mounted and reliably prevented from displacement with a simple structure. The wires can be readily mounted and dismounted by the hook and the hook receiver.

Abstract: Improved metallic utility pole accessories used to either support objects on a utility pole or to support and stabilize the pole are provided. In general, the utility pole accessories include a polymeric chemically bonded coating that protects the underlying metal surface from corrosion. The coating also is substantially dielectric for preventing the accessories from interfering with the transmission of electricity through lines supported on the poles. The polymeric coating can be made from polymeric materials having functional monomers grafted thereto for chemically bonding with metal surfaces. Specific accessories within the scope of the present invention include crossbars, anchoring pins, transformer boxes, and guidewire supports. Also included is an improved insulator support post having a threaded portion made from a structural plastic material bonded to the polymeric coating.

Abstract: A composite insulator includes an insulating rod, an elastic insulating material molded around the insulating rod and having a plurality of shed portions, and end fittings fixedly fitted around opposite ends of the insulating rod. The end fittings cover the respective end portions of the elastic material. End faces of the end fittings abut respective shed portions of the elastic insulating material.

Abstract: A liquid adhesive comprising a dispersion of the following component (b) in a solution of the following component (a) in an organic solvent:(a) a piperazinylethylaminocarbonyl-containing butadiene-acrylonitrile copolymer(b) a maleimide compound having at least two maleimide groups.An insulating pattern or insulating layer is formed by applying the liquid adhesive onto an electronic part by a dispensing or screen printing method, followed by thermally curing.

Abstract: A suspension insulator having a porcelain insulating member with a head portion and a shed, a metal cap cemented to the top of the head portion, and a metal pin cemented to the lower end of the head portion at a pin hole formed in the head portion. The pin hole has a closed top and a downward opening, and its inside surface includes a cylindrical surface portion around the opening, a curved top surface and a round corner surface forming a smooth boundary between the cylindrical surface portion and the curved top surface. The cemented part of the inside surface of the hole has sands rigidly deposited thereon over a range from its lower end to a level within .+-.3 mm of the junction between the cylindrical surface portion and the round corner surface. The cylindrical surface portion has a radius equal to D and the round corner surface has a radius of curvature equal to Y, such that a ratio of Y/D is in the range of 0.3-0.45.

Abstract: The disclosed insulator has an insulating member with a cylindrical core, a metal cap with a central hole of inside diameter D so that the core of the member is cemented to the central hole of the metal cap, and a metal pin cemented to the inside of the core of the member. The metal pin has a cemented rod portion with a diameter d.sub.1 and a large-diameter portion with an outside diameter d.sub.2 at an end buried in the core of the member. The diameters satisfy the conditions of(d.sub.2 -d.sub.1)/d.sub.1 .ltoreq.0.5(D-d.sub.2)/d.sub.2 .ltoreq.1.8.

Abstract: An explosion-preventing suspension insulator includes an insulator body and a metal cap and a metal pin both being bonded to the insulator body by means of cement. A synthetic resin based electrical insulating film having a Young's modulus of elasticity of from 20,000 to 80,000 kgf/cm.sup.2 is provided in a specific thickness on the inner surface of the metal cap and the outer surface of the metal pin at a portion where the metal pin is buried into the cement. The preferred thickness of each electrical insulating film is from 600 to 1,500 .mu.m.

Abstract: An electrolytic corrosion resistant insulator includes an insulator body having a cavity therein and a metallic pin having a portion located within the cavity and secured therein by cement. A sacrificial anode surrounds the pin at an intermediate portion thereof and protrudes radially from the pin. Part of the sacrificial anode is covered by the cement. An electric insulating film of a synthetic resin is lamination-attached to the pin and covers substantially the entire outer surface of the portion of the pin which is secured within the cavity by the cement. The electric insulating film also covers approximately half of the upper portion of the sacrificial anode. The electric insulating film is free from pin holes and has a thickness between 200 and 600 micrometers.

Abstract: A ball and socket type suspension insulator, wherein the radius of curvature at the fillet portion between the shank portion and a ball portion of a ball pin buried and secured into the inside of a head portion of an insulator body is designed at 30-40% of the diameter of the pin shank portion, and the angle which a contact surface between the socket portion of the cap attached to the outer surface of the head of the insulator body and the ball pin forms with respect to the horizontal plane is 38.degree.-45.degree..

Abstract: The member is in the form of a hollow body having a skirt (2) surmounted by a head (1), the entire body exhibiting circular symmetry about an axis (10). The hollow body has an internal ring (5) at an intermediate level between the head and the skirt. The surface of the internal ring is corrugated as traced by a generator line at a constant angle to said axis and moving around a closed corrugated curve situated in a plane orthogonal to said axis. This arrangement provides resistance to torsion forces without requiring any sharp inside edges that are difficult to manufacture in tempered glass.

Abstract: The suspension insulator of the present invention has an improved shape of the embedding portion of a metal pin, which is an embedding multi-step portion constructed with an inverted spherical convex trapezoid upper expanded portion having a larger surface at the top end and an inverted frust-conical lower expanded portion succeeding to the upper expanded portion. By using such a metal pin, the stress distribution of the insulating body is made uniform and therefore a small size and light weight of suspension insulator having high tensile strength is obtained.

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.