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Movement monitor

  • US 4,862,144 A
  • Filed: 04/04/1988
  • Issued: 08/29/1989
  • Est. Priority Date: 04/21/1987
  • Status: Expired due to Fees
First Claim
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1. A movement monitor comprising:

  • a rigid base member for supporting a moving object in which movement is being monitored,a transducer located between said moving object and said base member for detecting movement of said moving object, said transducer providing an output signal in response to forces applied thereto,a reaction means secured to the base member and arranged to extend over, and be held in contact with, the moving object such that upward movement by the moving object is restricted by said reaction means and movement by the moving object against said reaction means causes force to be applied to the transducer, andcircuit means for monitoring said output signal from the transducer, said circuit means arranged to provide an alarm when said output from the transducer corresponds to no movement from the object.

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