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Resin-sealed electrical device

  • US 4,042,955 A
  • Filed: 03/22/1976
  • Issued: 08/16/1977
  • Est. Priority Date: 06/22/1973
  • Status: Expired due to Term
First Claim
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1. In a resin sealed electrical device comprising a case, a layer of finely divided insulating material and electrical elements both retained within said case and a resinous cover layer sealing said case,the improvement of providing a weather-resistant and shock-resistant device comprising using a finely-divided insulating layer having a grain size between about 61 and 4760 microns in size, in combination with a low viscosity resin cover layer which resin is at least partially impregnated into the finely divided insulating layer securing and retaining the insulating layer within said case and forming a weather-resistant cover layer sealing said case and the insulating layer and electrical elements contained therein.

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