Synthetic resin packed coil assembly
First Claim
1. A synthetic resin packed coil assembly which comprisesa wound spiral of a plurality of bundled turns of insulated wire,a first layer of high strength fibrous material impregnated with a synthetic resin, said first layer forming the outer periphery of said synthetic resin packed coil assembly,an intermediate insulating layer disposed between said wound spiral and said first layer, anda semi-conductive layer disposed between said intermediate insulating layer and said first layer, said semi-conductive layer being constituted by a first ply firmly bonded to said intermediate insulating layer and a second ply firmly bonded to said first layer, there being a layer of a release agent and an air-gap layer disposed between said first and second plies.
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Abstract
A synthetic resin packed coil assembly formed by a wound spiral of a number of bundled turns of insulated wire comprises at least one layer enveloping the bundled turns of insulated wire of the wound spiral. This layer is composed of a synthetic resin reinforced by a high strength fibrous material and is formed by first winding the high strength fibrous material around the bundled turns of insulated wire of the wound spiral, subsequently impregnating a solution of the synthetic resin and finally allowing the synthetic resin to harden.
29 Citations
9 Claims
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1. A synthetic resin packed coil assembly which comprises
a wound spiral of a plurality of bundled turns of insulated wire, a first layer of high strength fibrous material impregnated with a synthetic resin, said first layer forming the outer periphery of said synthetic resin packed coil assembly, an intermediate insulating layer disposed between said wound spiral and said first layer, and a semi-conductive layer disposed between said intermediate insulating layer and said first layer, said semi-conductive layer being constituted by a first ply firmly bonded to said intermediate insulating layer and a second ply firmly bonded to said first layer, there being a layer of a release agent and an air-gap layer disposed between said first and second plies.
Specification