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Hammer having integral stud and mains sensor

  • US 6,188,228 B1
  • Filed: 11/06/1998
  • Issued: 02/13/2001
  • Est. Priority Date: 11/21/1997
  • Status: Expired due to Term
First Claim
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1. Apparatus comprising, in combination, a hammer an a capacitive measurement circuit for sensing an object behind an opaque surface, the apparatus comprising indicator means for indicating the proximity of the sensed object to an operator, the apparatus characterized in that:

  • a metal striking head of the hammer comprises a sensing plate electrically coupled to the capacitive measurement circuit which is disposed in a handle of the hammer, the capacitive measurement circuit adapted to measure a capacitance between the head of the hammer and an electric ground; and

    wherein;

    the indicator means is adapted to indicate a representation of the measured capacitance.

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