Abstract: A tubular metal insert is disclosed having a threaded exterior and an incompletely threaded interior, that is threaded into a tapped hole in a base material by an insert driver tool. Discrete locking plugs are positioned in the threaded exterior of the insert outwardly from the incompletely threaded interior. Rotation of the insert driver completes the threads on the interior portion of the insert which creates a force that urges the discrete locking plugs outwardly into engagement with the walls of the hole to securely lock the insert in the tapped hole.

Abstract: A pulp insulated electric communications conductor in which the wood pulp fibers of the insulation are coated with an aqueous based cationic deposition aid polymer and then an aqueous based anionic latex polymer. In a process for applying a layer of insulating material to the conductor a slurry of wood pulp fibers is prepared to which first an aqueous based cationic deposition aid polymer is added and then an aqueous based anionic latex polymer is added, the resultant coated wood pulp fibers being applied to the conductor.

Abstract: An insulated electrical conductor comprising a core carrying an inner coating of heat resistant material and a uniform outer coating of fused polymeric material forming a smooth pin-hole free surface.

Abstract: A method of producing an insulated electrical conductor, in which a wire conductor is coated with an inner layer of heat resistant material and covered with electrostatically deposited powdered polymeric material which is fused by heat to form an outer layer of insulation. An insulated electrical conductor produced by this method comprises a core carrying an inner coating of heat resistant material and an outer coating of fused polymeric material.

Abstract: A pulp insulated electric communications conductor in which the wood pulp fibers of the insulation are coated with an aqueous cationic deposition aid polymer and then an aqueous based anionic latex polymer. In a process for applying a layer of insulating material to the conductor a slurry of wood pulp fibers is prepared to which first an aqueous based cationic deposition aid polymer is added and then an aqueous based anionic latex polymer is added, the resultant coated wood pulp fibers being applied to the conductor.

Abstract: An apparatus for collecting powder exhausted from an electrostatic fluidized bed coater, in which exhaust air passes from the cloud chamber of the coater into an inner exhaust chamber and then passes through a porous plate to an outer exhaust chamber, the powder carried by the exhaust air being stopped by the porous plate and thereafter collected from the inner chamber.