Method of manufacturing a lightning arrester, and a lightning arrester obtained by the method
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United States of America Patent
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Apr 25, 1989
Grant Date -
N/A
app pub date -
Mar 3, 1988
filing date -
Mar 6, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a method of manufacturing a lightning arrester (100) having two end fittings (2,20) at either end of a substantially cylindrical central core constituted by a stack of pellets (6, 7, 8) made of a varistor-type material and having holes therethrough whereby the pellets are threaded over a central rod (1) made of stratified material. The stack assembly is put into compression against the two facing faces of the end fittings (2, 20) by means of the rod (1), the space between the rod (1) and the pellets (6, 7, 8) is filled by casting or injecting an insulating material, with the assembly obtained in this way being perfectly rigid, and a coating (30) of an elastomer of the EPDM type is molded over the assembly, with the coating adherring perfectly to all of the surfaces of the core and of the end fittings which it covers.
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