Abstract: Disclosed is a high voltage electric appliance comprising electric coils whose conductors are wrapped by an insulating tape with subsequent impregnation of thermosetting resin for the electrical insulation. The insulating tape is a laminated body consisting of a built-up mica of fine mica particles and synthetic pulp or a paraffin powder and a reinforcing member. The bonding among the fine mica particles and between the fine mica particles and the reinforcing material is effected by the synthetic pulp as melted and solidified.

Abstract: An abrasion-resistant fluoropolymer mixture comprising(A) from 75 to 99% by weight of a fluorocarbon polymer(B) from 1 to 25% by weight of an oxidized polyarylene sulfide and, based on the sum (A)+(B),(C) from 0 to 15% by weight of a filler,is used for the production of feed pipes for Bowden cables which are pressure-resistant and abrasion-resistant.

Abstract: A wire construction comprising an electrically conductive core, two polymeric insulation layers and a layer of fiber braid between the insulation layers, characterized by excellent flexibility and resistance to cut-through and arc propagation.

Abstract: A multicore coaxial cable includes a conductor layer, an insulator layer surrounding the conductor layer, plastic tape surrounding the insulator and a metal shield surrounding the plastic tape. The exterior surface of the plastic tape is coated with a metal layer to contact the metal shield to reduce the electrostatic noises in the cable.

Abstract: In the making of an electrical cable, a metal shield is formed by wrapping metal strip around a cable core with longitudinal edges of the strip overlapping. The strip is corrugated with the corrugations nesting in the overlapped regions. A shield gap filler is provided by extruding a heated molten plastics material and directing it between the overlapped regions. Upon cooling, the filler hardens and bonds the edges together. A cable jacket is extruded around the shield.

Abstract: A shielded multiconductor flexible cable for protection against EMI and/or RFI is disclosed. The shielded cable is comprised of a plurality of conductors disposed between two layers of insulating substrates, said cable having a graphic shield disposed on the exterior surface of at least one of the insulating substrate layers. The graphic shield is comprised of solidified conductive ink. Said ink provides an interference shield against EMI and RFI.

Abstract: Methods and apparatus are provided for controlling the quantity and distribution of a waterproofing material (26) on an advancing strip (76) of plastic material which is wrapped subsequently about an advancing cable core (22) to form a core wrap. When the plastic strip is wrapped about the core, which has been filled with the same waterproofing material, the waterproofing material on the strip fills any spaces between the strip and the core, between the strip and an inner metallic shield (31) and a longitudinal overlapped seam of the core wrap. In another cable structure, a controlled amount of waterproofing material is disposed along a longitudinal edge portion of the advancing strip of plastic material to insure a sealed seam when the strip is wrapped about the core.

Abstract: A cable shielding method and apparatus are disclosed wherein adhesive 42 is applied to a strip 40 of shielding material within a shield forming die 20 as the strip 40 is being formed about a cable core 10 with an overlapped shield seam.

Abstract: Apparatus for the dry cross linking of strands of elastomer, in particular in the production of elastic cables and multilayered profiles comprises a string of tubes through which the strand passes. Between adjacent tube sections, there are hollow bodies having central cavities in line with the bore of the tubes and a plurality of branch cavities radiating from the central cavity. One of the branch cavities is connected through a UHF transformer and a wave guide with the UHF generator while tuning probes are arranged in other branch cavities. The UHF transformer has an inwardly diverging tapered opening in which a tapered plug of ceramic or plastic is fitted to provide a pressure seal. The interior of the tube sections and the hollow bodies is supplied with inert gas under pressure.

Abstract: A dielectric system for coaxial electrical conductors is provided. The dielectric system separates an inner and an outer conductor and is composed of a first layer of cellular polyparabanic acid. This layer directly contacts and provides a continuous skin circumferentially surrounding the inner conductor along its length. A second layer, consisting of a crosslinkable polymeric lacquer which provides a continuous skin enclosing the first layer is also provided. The dielectric system is used in coax cables.

Abstract: A filament of synthetic polymers which, in its cross section over the entire length of the thread, comprises at least three layers, of which at least two layers are electrically conductive and at least one layer located between the conductive layers consists of an electrically insulating synthetic polymer.

Abstract: A fibrous reinforced flexible hose for conveying fluids such as paint under pressure is provided with a composite core tube preferably simultaneously co-extruded from two or more synthetic polymers which are in intimate contact with each other. The inner layer of the composite core tube is nylon or other chemical resistant polymer which may or may not be cross-linked and the outer layer is a cross-linked electrically semi-conductive synthetic polymer layer which serves as a ground for static electricity. In the process of making the hose, the semi-conductive layer is preferably cross-linked by irradiation as a means of improving its higher temperature performance capabilities and to minimize changes in the electrical resistance of the semi-conductive layer that might arise from dynamic use of the hose.

Abstract: A formulation which may be applied to a substrate to produce a flexible, high temperature, thermally stable and color stable film thereon. The formulation comprises a poly(1,3-imidazolidine-2,4,5-trione) polymer, a free radical scavenger in an amount sufficient to inhibit cleavage and cross-linking of the polymer by action of oxygen thereon, and a solvent for the polymer. Also disclosed are a method for applying a flexible, high temperature, thermally stable and color stable color coating to a polyimide substrate; the substrate so coated; and an insulated conductor assembly having a polyimide insulative cover and an imidazolidine trione based-top-coating over the cover.

Abstract: There is described a hermetic coaxial cable particularly adapted to be produced in miniature form and having a completely solid cross section with a solid metal central conductor, a tubular metal outer conductor, and a continuous glass dielectric insulator therebetween.