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Portable Motion Detector And Alarm System And Method

  • US 20100097205A1
  • Filed: 06/08/2009
  • Published: 04/22/2010
  • Est. Priority Date: 07/03/2003
  • Status: Active Grant
First Claim
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1. An inertial sensor comprising a piezoelectric transducer having a piezoelectric element, a mass having a rounded surface configured for rolling motion, said rounded surface being attached for rolling on a surface of said piezoelectric transducer, a substantial portion of said mass being disposed within a perimeter of said piezoelectric transducer.

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