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DAMAGE DETECTION

  • US 3,818,467 A
  • Filed: 02/01/1973
  • Issued: 06/18/1974
  • Est. Priority Date: 02/01/1973
  • Status: Expired due to Term
First Claim
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1. Apparatus for use on a normally vertical post supporting a remote signalling device including a radio transmitter, comprising an electric generator having output means connected to said transmitter, a source of mechanical energy, and means for applying mechanical energy from said source to cause operation of said generator and said transmitter when the orientation of said post departs from the vertical by a predetermined amount.

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