Vapor cooled electrical inductive apparatus

H - Electricity – 01 – F

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336/14, 337/3

H01F 27/18 (2006.01) H01B 7/02 (2006.01) H01F 27/28 (2006.01) H01F 27/32 (2006.01) H01F 41/04 (2006.01) H01F 41/12 (2006.01)

Patent

CA 1180073

48,334 ABSTRACT OF THE DISCLOSURE Vapor cooled induction apparatus having a wind- ing with predetermined surface irregularities on the turn surfaces of the winding to provide spaces to permit a cooling/insulating vaporizable liquid dielectric to flow between the turn surfaces of the winding to enable a film of the insulating cooling dielectric to be deposited on the surface area of the winding. The surface irregularities may be transverse grooves disposed at predetermined inter- vals in at least one surface of an elongated metallic conductor used to form the winding or they may be bosses of insulation disposed on a predetermined spacing on at least one surface of the elongated metallic conductor. Also disclosed are a method and apparatus for forming precisely spaced grooves in the surface of a continuously moving elongated conductor and thereafter insulating the grooved conductor with a uniform, solid, homogeneous coating of electrical insulation.

376900

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