H - Electricity – 01 – B
Patent
H - Electricity
01
B
26/142
H01B 19/00 (2006.01) B29C 43/18 (2006.01) B29C 65/00 (2006.01) B29C 65/66 (2006.01) B29C 69/02 (2006.01) B29C 70/74 (2006.01) H01B 17/32 (2006.01) B29C 43/00 (2006.01) B29C 45/00 (2006.01) B29C 45/02 (2006.01) B29C 47/00 (2006.01)
Patent
CA 1236965
ABSTRACT OF THE DISCLOSURE 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 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 pro- ducing 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. The sheds may be stretched on a mandrel at room temperature and then chilled prior to insertion upon the sheath; subsequent warming shrinks the sheds for a tight grip on the sheath. -23-
472465
Goudreau Gage Dubuc
Lapp Insulator Company
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