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Method of manufacturing a lightning arrester and a lightning arrester obtained by the method

  • US 4,864,456 A
  • Filed: 07/26/1988
  • Issued: 09/05/1989
  • Est. Priority Date: 08/06/1987
  • Status: Expired due to Term
First Claim
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1. A method of manufacturing a lightning arrester by assembling a stack of pellets made of a varistor type material separated by spacers and terminated by two metal end fittings, providing electrical connections between successive pellets and between the end pellets and the two end fittings, and winding a filament around said stack, wherein the method includes the following steps:

  • selecting the spacers to be tubular and providing said electrical connections between metal-coated faces of pairs of adjacent pellets inside the spacers;

    performing said filament winding with resin impregnated glass fibers in such a manner as to ensure that all of the component parts of the stack remain properly alignedand the resin impregnated glass fibers adhere to and radially bind said stack without imposing significant longitudinal compression;

    polymerizing the resin in the impregnated glass fibers; and

    injecting a coating of EPDM type material over the polymerized glass fiber winding.

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