Abstract: The present invention is directed to a communication cable having improved adhesion between metallic and non-metallic layers. The cable has a metallic core structure in which at least one optical fiber and/or electrical conductor is housed, at least one external layer fabricated from a non-metallic material and an adherent, plasma deposited polymeric film coating between the core structure and an external layer for improving the adhesion between the core structure and the external layer. A process and apparatus for fabricating the communication cable are also described.

Abstract: A process for producing an insulating twisted electric wire having a reduced overall diameter with an insulating coating of high quality. The insulating coating has a thickness in a range of 3 to 100% of the radius of a smallest circle circumscribing the assembled set of twisted conductors. The insulating coating is formed by two or more cycles of coating and curing an insulating paint. Preferably, a bottom layer of the insulating coating is formed by applying a heat-curable insulating paint with a felt applicator or with a roller coating device. The heat-curable insulating paint should have a viscosity of not more than about 300 cps at 30.degree. C.

Abstract: A magnet wire enamel having improved runnability and insulating properties is described comprising nylon containing 0.5% to 3.5% by weight tetraalkyl titanate. The nylon can be a sole coat, outermost coating, or bond coat.

Abstract: A magnet wire enamel having improved runnability and insulating properties is described comprising nylon containing a titanate selected from the group consisting of (RO).sub.4 Ti, dimers, trimers, and mixtures thereof where R is an aromatic group. The nylon can be a sole coat, outermost coating, or bond coat.

Abstract: The purpose of the invention is to manufacture varnish-bonded thread-covered circular-section and profile-section wires and braided conductors in a manner which is particularly cheap and which involves particularly little risk of contaminating the environment.Suitable thread-covered wires and braided conductors are obtained by impregnation, in one operation, with partially crystalline or amorphous thermoplastic polycondensates.

Abstract: A coaxial cable is provided having a ribbon inner conductor surrounded by a dielectric and a circumferential conductor. The coaxial cable may be microminiature comprising a very thin ribbon strip conductor from between 5 to 15 .mu.m thick and from 150 to 200 .mu.m wide, having a surrounding foamed dielectric or parylene applied thereon by a vapor plasma process and an outer conductor of an adhering high conductivity metal vacuum deposited on the dielectric. Alternately the foam dielectric embodiment may have a contiguous parylene coating applied adjacent the inner conductor or the outer conductor or both. Also, the cable may be fabricated by forming a thin ribbon of strip conductive material into an inner conductor, applying thereabout a dielectric by spraying on a solution of polystyrene and polyethylene and then vacuum depositing and adhering high conductivity metal about the dielectric.

Abstract: A magnet wire enamel having improved runnability and insulating properties is described comprising nylon containing 0.25% to 20% by weight titanium chelate. The nylon can be a sole coat, outermost coating, or bond coat.

Abstract: Methods of constructing a void-free, cellulose-free electrical winding insulated with a solid resinous insulation. The method includes forming a plurality of conductor turns on a substrate, with each conductor turn being immersed in liquid resinous insulation as it is formed, to provide a void-free intermediate structure. The void-free aspect of the intermediate structure is maintained up to and including the final step of the method by building solid insulation, thin layer upon thin layer, from the liquid resinous insulation, while the conductor turns are being formed, with the solid insulation, as it is formed, providing a solid substrate for the continued application of liquid resinous insulation and subsequent conductor turns of the winding.

Abstract: A corona-resistant wire enamel composition is described comprising a polyetherimide resin and from about 1% to about 35% by weight of dispersed alumina particles of a finite size less than about 0.1 micron, the alumina particles being dispersed therein by high shear mixing. A method of providing corona resistant insulations for an electrical conductor employing the above composition and an electrical conductor insulated with a coating of the wire enamel composition are also disclosed.

Abstract: A corona-resistant wire enamel composition is described comprising a polyimide, polyamide, polyester, polyamideimide, polyesterimide, or polyetherimide resin and from about 1% to about 35% by weight of dispersed alumina particles of a finite size less than about 0.1 micron, the alumina particles being dispersed therein by high shear mixing. A method of providing corona resistant one and two-stage insulations for an electrical conductor employing the above compositions and an electrical conductor insulated with a one or two-stage coating of the wire enamel compositions are also disclosed.

Abstract: A method and apparatus provides an essentially neutrally buoyant undersea ectronic data communications link. A bundle of continuous synthetic fibers each having a diameter of about ten microns has individualized metallized layers coated to a thickness of about one to three microns and the whole lot is covered by dielectric insulation. The synthetic fibers, aromatic polyamide fibers or graphite fibers, are relatively light-weight yet have high tensile strengths to assure a sufficient load bearing capability for the undersea use and the number of thin metallized coatings provide the electrical data transmission capability without unduly weighting down the cable. The dielectric insulation layer is disposed coaxially outwardly of the coated fibers and optionally is provided with an outer sheath of conductive material for a return path. However in some applications a seawater return path is better.

Abstract: A varnish suitable for spray coating on plastic insulated copper conductors restores cracked or damaged insulation. The varnish cures by reaction in air upon application to the conductors. The varnish comprises drying oil (typically, tung oil and castor oil), phenolic resin, metallic catalysts, and solvents.

Abstract: An insulated wire having excellent heat resistance, abrasion resistance and flexibility can be prepared by coating on an electric conductor directly or via another insulating material a polyamide-imide resin composition prepared by reacting an aromatic diisocyanate and a tricarboxylic acid anhydride in the presence of a basic solvent while adjusting the resin content at 40% by weight or more, and adding to the reaction system a lactam in an amount of 0.1 to 1.0 mole per mole of the aromatic diisocyanate, and if necessary, an alcohol and/or an oxime in an amount of 0.01 to 0.5 mole per mole of the aromatic diisocyanate before, during or after the above-mentioned reaction to mask terminal functional groups and to make the reduced viscosity of the composition 0.1 to 0.27, and baking the resin composition.

Abstract: A corona-resistant wire enamel composition is described comprising a polyimide, polyamide, polyester, polyamideimide, polyesterimide, or polyetherimide resin and from about 1% to about 35% by weight of dispersed alumina particles of a finite size less than about 0.1 micron, the alumina particles being dispersed therein by high shear mixing. A method of providing corona resistant one and two-stage insulations for an electrical conductor employing the above compositions and an electrical conductor insulated with a one or two-stage coating of the wire enamel compositions are also disclosed.

Abstract: A method of making a multiconductor cable assembly is disclosed wherein at least a portion of the cable assembly is comprised of multiple insulation-sheathed conductors arranged side-by-side in contiguous relation so that the insulation sheaths of adjacent conductors have a substantial interfacing contact area. First and second beads of material integral with the adjacent conductor sheaths and located adjacent each side of the interfacing contact area hold the cable together and maintain its flat profile. The cable can also include portions having a compact profile and can have unbonded ends. The cable assembly is formed by applying a bonding agent, comprised of a filler dissolved in a solvent for the insulation sheaths, as a bead between each pair and on each side of contiguous conductor sheaths. The bonding agent beads initially intermingle with the insulating sheaths material, but do not penetrate into the interfacing area between contiguous sheaths.

Abstract: A low mechanical noise coaxial cable for suppressing noise due to mechanical movement of the cable wherein the cable includes a central conductor, a dielectric surrounding the conductor, electrical shielding embedded in conductive material surrounding the dielectric and preferably, jacketing structure holding the above recited elements in place.

Abstract: An elongated metallic conductor is insulated with an inner layer of a plasticized polyvinyl chloride composition and an outer layer of a plasticized, irradiation cross-linked polyvinyl chloride composition. The outer layer has a low coefficient of friction to facilitate pulling in central office racks, has mechanical properties which are required for installation and use and, in a preferred embodiment, has a thickness which is substantially less than that of the inner layer. The layers are extruded in the same extruder crosshead that seemingly causes the outer layer to bond to the inner layer to facilitate stripping of the composite insulation from the conductor.

Abstract: An enameled wire having resistance to overload which comprises an electric conductor and a baked wire enamel coat is disclosed. The wire enamel coat is applied to the conductor through a die from wire enamel comprising a silicone resin having incorporated therein 50 to 200 phr of particles of an inorganic tabular crystalline material that have a maximum average particle size not greater than 80.mu., an average not greater than 40.mu. and an average aspect ratio between 30 and 100 and which react with the silicone resin at elevated temperatures to become a ceramic and which have been surface-treated with a coupling agent, a surface active agent or a coating agent. The tabular crystals in the wire enamel coat are orientated parallel to the surface of the conductor. The enamel coat has good adhesion to the conductor and will not easily crack or peel off the conductor even when subjected to high temperatures and adverse physical stress.

Abstract: A magnet wire having a nylon outer coating is described which is capable of power insertion into coil slots in a locking wire size range by virtue of a specific lubricant outer coating. The external lubricant comprises a mixture of paraffin wax and hydrogenated triglyceride. An internal lubricant composition comprised of esters of fatty alcohols and fatty acids and/or hydrogenated triglyceride can be added to the nylon coatings to provide greater ease of insertability.

Abstract: A method of curing an anaerobic resin, which primarily contains acrylic resin, includes externally catalyzing the cure of the resin with a metal-beta keto ester complex having the structural formula: ##STR1## where M is a transition metal; R.sub.1 is selected from the group consisting of alkyl groups having from 1 to 20 carbon atoms, benzene, naphthalene, anthracene, and hydrocarbon substituted aromatic; R.sub.2 and R.sub.3 are selected from hydrogen, alkyl groups having from 1 to 20 carbon atoms, benzene, naphthalene, anthracene and hydrocarbon substituted aromatic; R.sub.4 is selected from alkyl groups having from 1 to 20 carbon atoms; and n is equal to the valence of the metal M.

Abstract: A method and apparatus to apply pulp to a telecommunications conductor with an adhesive which is formed from acrylic resin solution. The solution is applied in a bath and is passed between wiping rolls with the feed speed of the conductor and the differential speed between the peripheral surfaces of the wiping rolls and the conductor being controlled together with the contact angle between the conductor and the rolls. This control results in a dried thickness of resin of no greater than 0.00015 inches and as little as 20 microns after further stages in the method. These steps include drying the solution in a solution drying oven, coating the adhesive with pulp and drying the pulp coated conductor.

Abstract: A heat-resistant insulated electric wire and cable which comprises an electric conduction; the first coating layer thereon consists of a mixture of a binder and a finely ground and unmelted inorganic substance; and the second organic insulating coating layer formed on the first coating layer. Said heat-resistant insulated electric wire can advantageously be used for a coil of a magnet or a motor.

Abstract: This invention concerns an apparatus for the industrial production of electrical conducting wires treated by flocking and coated with adhesive.

Abstract: A coil structure for cellulose-free transformer coils characterized by at least three helically wound layers disposed in a reversal pattern with wedge-shaped resinous insulators between each layer.

Abstract: A magnet wire having a polyamide-imide outer coating is described which is capable of power insertion into coil slots in a locking wire size range by virtue of a specific lubricant outer coating. The external lubricant comprises a mixture of paraffin wax and hydrogenated triglyceride. An internal lubricant composition comprised of esters of fatty alcohols and fatty acids can be added to the polyamide-imide coatings to provide greater ease of insertability.

Abstract: A polyborosiloxane composition to be used for the formation of an insulating layer on an electric conductor comprises (A) a polyborosiloxane produced by the reaction of boric acid, a boric acid derivative, or a halogenated boron with a silane compound and a silicone oil, (B) a silicone resin or a synthetic resin having a nitrogen-containing heterocyclic ring in the molecule, (C) an inorganic filler, and (D) a common solvent for (A) and (B). An insulated electric wire excellent in thermal resistance is obtained by applying the composition to an electric conductor and baking the applied layer of the composition.

Abstract: Provision of a protective cover for a fibrous layer of insulation on a conductor by forming an inner layer of the protection cover by depositing a polymeric based composition without creating a crushing effect, and then, in tandem, hardening the inner layer and applying a second coat by extrusion. The inner layer absorbs the crushing forces of extrusion to protect the fibrous layer during addition of the second layer. The inner layer is preferably formed by electrostatic deposition coating and prevents pinhole formation in the second layer.

Abstract: A voltammetric cell, particularly for the determination of trace elements in a liquid, such as water, comprises a cover in which the measuring electrode and a reference electrode are mounted and which sealingly engages the cell vessel so that the contents of the latter will be sealed from contamination by the environment during the measuring process. The exchangeable measuring electrode has an analysis cup or crucible within the vessel into which the electrode can be inserted the bottom of the vessel having a configuration complementary to the external configuration of the replaceable crucible or cup. The cup may have a downwardly tapering frustoconical configuration and the base of the vessel can have a corresponding downwardly tapering recess accommodating at least the bottom of the cup.

Abstract: The disclosed adhesive products include a carrier sheet bearing a polymeric film and an adhesive layer, overlying the film as in dry transfers or underlying the film in products such as wire markers and other labels, or there may be adhesive layers both over and underneath the polymeric film. A constituent initially contained in the polymeric film layer migrates into an ordinarily non-tacky precursor of the adhesive layer, thereby rendering the precursor tacky. The precursor layer becomes adhesive only where it is opposite the polymeric film, being non-tacky outside the area of the film. In important applications, the common area of film and adhesive layers does not cover the whole carrier sheet. Both the adhesive precursor layer and the polymeric film may include portions extending outside the common area.

Abstract: A novel method for manufacturing magnet wire in a continuous process by which coatings of a flowable resin material may be applied concentrically to a moving elongated filament in thicknesses of about 16 mils or less. The filament can be a bare copper or aluminum conductor having round or rectangular configuration or an insulated conductor upon which a top or an intermediate coat of material is desirably applied. Coatings of one-half and one mil also can be applied by the method of the invention. By the method of the invention, magnet wire can be manufactured by continuously drawing the wire to size, annealing the wire, if necessary, insulating the wire with one or more coats of flowable resin material, curing the resin material, and spooling the wire for shipment, without interruption at speeds limited only by the filament pay-off and take-up devices used. The invention utilizes the flowable resin material to center the filament in a die, the size of the die controls the thickness of the coat to be applied.

Abstract: A magnet wire having a polyamide-imide outer coating is described which is capable of power insertion into coil slots in a locking wire size range by virtue of a specific lubricant outer coating. The external lubricant comprises a mixture of paraffin wax and hydrogenated triglyceride. An internal lubricant composition comprised of esters of fatty alcohols and fatty acids can be added to the polyamide-imide coatings to provide greater ease of insertability.

Abstract: Hot-melt electrical coating compositions comprise high solids content polyesterimides prepared to an acid number of less than 6-7 in the presence of a monoether or monoester of a glycol or polyglycol and reacted hot with a blocked polyisocyanate. Such virtually solventless compositions provide insulation coatings on electrical conductors which have superior flexibility, especially after aging.

Abstract: An insulated heat bondable electrically conductive material includes an electrically conductive substrate, a base coat on the substrate of electrically insulating, heat resistant, cured resin, and an overcoat of heat curable acrylic polymer upon the base coat forming a heat bondable acrylic polymer coating thereon.The disclosure also includes: an insulated heat bondable magnet wire; a bondable enamel coated, insulated electrical conductor; an article; a dynamoelectric machine; a method of making an insulated, heat bondable metal substrate; and, a method of self-bonding a plurality of turns of a magnet wire.

Abstract: A magnet wire having a nylon outer coating is described which is capable of power insertion into coil slots in a locking wire size range by virtue of a specific lubricant outer coating. The lubricant comprises a mixture of paraffin wax, hydrogenated triglyceride and ester lubricant composition comprising esters of fatty alcohols and fatty acids. An internal ester lubricant composition comprised of esters of fatty alcohols and fatty acids and/or an internal hydrogenated triglyceride lubricant composition can be added to the nylon coatings to further improve ease of insertability.

Abstract: A magnet wire having a polyamide-imide outer coating is described which is capable of power insertion into coil slots in a locking wire size range by virtue of a specific lubricant outer coating. The external lubricant comprises a mixture of paraffin wax, hydrogenated triglyceride and an ester lubricant composition comprised of esters of fatty alcohols and fatty acids. An internal ester lubricant composition comprised of esters of fatty alcohols and fatty acids can be added to the polyamide-imide coatings to further improve ease of insertability.

Abstract: A magnet wire having a polyamide-imide outer coating is described which is capable of multiple winding power insertion into coil slots without damage by virtue of an improved lubricant outer coating. The lubricant comprises a mixture of oleic acid, beeswax, fluorocarbon surfactant and paraffin wax.

Abstract: A high solids content, low molecular weight polymer, low viscosity polyamide-imide enamel is described. The enamel is a reaction product of polyisocyanate, trimellitic anhydride, and an isocyanate blocking alcohol having a ratio of free isocyanate to total carboxyl and anhydride groups of 0.99:1 to 0.85:1. The method of making the enamel and the method of coating electrical conductors such as magnet wire with such enamel are also disclosed.

Abstract: A high strength, lightweight composite wire is made by intercalating grape fiber with a material that will impart high electrical conductivities to the fiber. The intercalated fiber is coated with a wetting agent and the coated intercalated graphite fiber then placed in a molten bath of magnesium or a low melting magnesium alloy. A composite wire is then produced by extrusion through a suitable die.

Abstract: A method and apparatus are disclosed by which electrical conductor cable can be produced utilizing electrostatic coating means, which method and apparatus are highly convenient, uncomplicated and economical to carry out. An outstanding and unique feature of the cable produced in accordance herewith resides in the presence of a web portion of reduced cross-section connecting the individual conductors, by which manual severence of one from another is facilitated. Most desirably, the apparatus and method provide means for producing individual insulating coatings on each of the conductors, which means ideally utilizes an electrostatic cloud coating technique.

Abstract: A magnet wire having a polyamide-imide outer coating is described which is capable of multiple winding power insertion into coil slots without damage by virtue of an improved lubricant outer coating. The lubricant comprises a mixture of oleic acid, beeswax, fluorocarbon surfactant and paraffin wax.

Abstract: A magnet wire having a nylon outer coating is described which is capable of power insertion into coil slots in a locking wire size range by virtue of a specific lubricant outer coating. The lubricant comprises a mixture of paraffin wax, hydrogenated triglyceride and ester lubricant composition comprising esters of fatty alcohols and fatty acids. An internal ester lubricant composition comprised of esters of fatty alcohols and fatty acids and/or an internal hydrogenated triglyceride lubricant composition can be added to the nylon coatings to further improve ease of insertability.

Abstract: A magnet wire having a polyamide-imide outer coating is described which is capable of power insertion into coil slots in a locking wire size range by virtue of a specific lubricant outer coating. The external lubricant comprises a mixture of paraffin wax, hydrogenated triglyceride and an ester lubricant composition comprised of esters of fatty alochols and fatty acids. An internal ester lubricant composition comprised of esters of fatty alcohols and fatty acids can be added to the polyamide-imide coatings to further improve ease of insertability.

Abstract: A bondable enamel coated, insulated electrical conductor such as magnet wire. The bondable electrical conductor is formed by a base insulation coating on a metallic conductor such as wire, the base coating being a thermosetting, resin enamel, and a bondable overcoat of polyamide-imide enamel applied on said base coating. The polyamide-imide enamel includes residual solvent so that the polyamide-imide enamel is self-bondable.

Abstract: A method of and an apparatus for producing an electrical conductor wire, especially a profiled heavy wire wherein the wire to be coated is guided subsequently through applying means, calibrating means and through a hardening chamber in which the individual layers of varnish are exposed to ultraviolet radiation of different intensity of irradiation. The layers which are applied onto the conductor wire in superposing manner have different properties wherein the wire is running through the apparatus after each occurring application of varnish.

Abstract: A method for coating an article which comprises coating the article first with (I) at least one imide resin selected from the group consisting of polyester imide resins, polyamideimide resins, polyhydantoin resins and mixtures thereof, and then with (II) cyanate ester resin which comprises as essential components (a) at least one cyanate compound selected from the group consisting of polyfunctional cyanate esters, prepolymer of said cyanate esters, coprepolymer of said cyanate esters and an amine and mixtures thereof and (b) at least one maleimide compound selected from the group consisting of polyfunctional maleimides, prepolymer of said maleimides, coprepolymer of said maleimides and an amine and mixtures thereof is disclosed.

Abstract: A process for preparing a high voltage-ignition cable having a low electrostatic capacity comprising a resistive-conductor core, an insulator layer and a jacket layer, which comprises preparing a resistive-conductor core comprising a fiber bundle and a semiconductive material provided on at least on the circumferential surface thereof, extrusion coating a polyolefin resin on the circumferential surface of the resistive-conductor core to form an insulator layer, irradiating the insulator layer with electron beam to effect cross-linking of the resin, extrusion coating a polyolefin resin, without providing a reinforcing layer or after providing a reinforcing layer, on the cross-linked insulator to form a jacket and irradiating the jacket with electron beam.

Abstract: Colored material-containing pearlescent pigments based on mica flakes coated with metal oxide contain as colored material, a colored aluminum lake which is fixed as a water-insoluble compound on the surface of the pigment particles, the lake being formed from a precipitated aluminum hydroxide layer, wherein the aluminum hydroxide layer forming the colored lake contains 1 to 50% by weight of a compound of the formula ##STR1## wherein X is hydroxy or carboxy, Y is hydrogen or alkyl or alkenyl of 10 to 20 carbon atoms and Z is hydrogen, or alkyl or alkenyl of 10 to 20 carbon atoms, or the grouping ##STR2## said compound having a molecular weight of at least 150 and a solubility in water at a pH of 5-9 of at least 0.05 g/l, and said compound being precipitated onto the flakes together with the aluminum hydroxide layer. A process for the production of these pigments is also provided, as are cosmetics containing them.

Abstract: A method and apparatus for forming an electrically conductive layer on a corrosion-resistant layer which covers a cable. The cable is passed through a powder accumulating tank in which are mixed an electrically conductive powder and binder powder so as to allow the mixed powder to initially adhere to the surface of the cable. The mixed powder is then pressed against the surface of the cable first at a cable outlet of the powder accumulating tank and then with a powder applying device in which an endless powder applying belt or cloth is rotated around the cable at a rotational speed dependent upon the linear speed of the cable. The surface of the cable is then heated to melt the binder powder and cause the electrically conductive powder to yet more firmly adhere to the surface of the cable. The cable is then cooled and wound.

Abstract: An electrical conductor has a coating or layer of U-V cured material on the metallic conducting member. The ultra-violet cured coating is partially cured before application of pulp insulation. Further curing then produces a chemical bond between the ultra-violet cured coat and the pulp insulation to assist in holding the pulp on the conducting member. The conductor is economic to produce while providing an efficient moisture barrier between the pulp insulation and conducting member.

Abstract: Hot-melt electrical coating compositions comprise high solids content polyesterimides prepared to an acid number of less than 6-7 in the presence of a monoether or monoester of a glycol or polyglycol and reacted hot with a blocked polyisocyanate. Such virtually solventless compositions provide insulation coatings on electrical conductors which have superior flexibility, especially after aging.