Methods of making high voltage electrical insulators and oil-les

Metal working – Method of mechanical manufacture – Electrical device making

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Details

156 86, 15624422, 156294, 1563075, 174143, 174152R, 174179, H01B 1900, H01B 1702, H01B 1728

Patent

active

043121233

ABSTRACT:
The invention discloses resulting products and a method of producing high voltage resistant members employed in electrical installations such as bushings and insulators. The method comprises placing a sheath of unvulcanized elastomer on a core, which for example is a fiberglass rod, for example by extruding the sheath thereon, and mounting at least partially vulcanized sheds on the sheath therealong, then vulcanizing the sheath to form an integrated high voltage resistant member. The sheath is unvulcanized when the sheds are mounted thereon and then the sheath is heated to vulcanize it, in order to bond it to the sheds and to the core. The sheds also can be molded directly onto the sheath together therewith in steps along the length of the core. For producing a bushing, the sheath is placed on a core formed of a conductive stud wrapped with paper and metal foil and then impregnated with a suitable hardenable resin.

REFERENCES:
patent: 4217466 (1980-08-01), Kuhl
patent: 4246696 (1981-01-01), Bauer et al.

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