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Proximity sensor resistant to environmental effects

  • US 6,617,845 B1
  • Filed: 04/28/2000
  • Issued: 09/09/2003
  • Est. Priority Date: 04/28/2000
  • Status: Expired due to Term
First Claim
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1. A proximity sensor, comprising:

  • an elongated circular cylindrical sidewall portion formed of a material comprising copper and having spaced apart ends, the material having a thermal conductivity of at least about three Watts per centimeter per Kelvin; and

    proximity sensing circuitry located within the sidewall portion, the proximity sensor being operative to sense proximity of an object through one of the ends of the sidewall, wherein the sidewall portion is threaded about an axis extending longitudinally through the sensor housing, whereby when the proximity sensor is employed in a welding environment, slag build-up is mitigated.

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