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Seismically activated appliance switch

  • US 5,596,183 A
  • Filed: 10/18/1995
  • Issued: 01/21/1997
  • Est. Priority Date: 10/18/1995
  • Status: Expired due to Fees
First Claim
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1. For use in controlling an electrically powered device, a seismically activated switch apparatus comprising:

  • an electronic switch having a controlled power coupling path and a trigger input;

    an input power coupler and output power coupler interconnected through said controlled power coupling path;

    an annular ring defining a ring plane and an aperture;

    a contact weight defining a varying cross-section;

    a spring rod having a fixed end and a free end, said free end being secured to said contact weight and said spring rod resiliently supporting said contact weight; and

    adjustable ring support means for supporting said ring such that said contact weight extends through said aperture of said ring and for raising and lowering said ring to move said ring plane with respect to said contact weight,said trigger input being coupled to said input power coupler through contact of said annular ring and said contact weight.

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