Incipient lightning detection and device protection

  • US 5,291,208 A
  • Filed: 04/30/1992
  • Issued: 03/01/1994
  • Est. Priority Date: 04/30/1992
  • Status: Expired due to Term
First Claim
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1. An apparatus for protecting an electrical device from potentially damaging electrical field levels, the apparatus comprising:

  • means for detecting changes in an electrical field indicating the incipient presence of a potentially damaging electrical field level; and

    ,means responsive to the signal of the detecting means for electrically grounding a normally ungrounded circuit of the electrical device, and wherein the grounding means also disables and electrically grounds the detecting means in response to its own signal.

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