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Safe mains voltage supply outlet and method

  • US 5,029,037 A
  • Filed: 10/10/1989
  • Issued: 07/02/1991
  • Est. Priority Date: 06/17/1988
  • Status: Expired due to Fees
First Claim
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1. A method of rendering an outlet having terminals connected to a mains power supply of predetermined supply voltage safe from shock upon human touching of the outlet terminals, that comprises, current-sensing whatever impedance may be presented between said terminals;

  • responding to said sensing to apply only a fraction of said predetermined supply voltage from said supply for current-sensed impedance values corresponding to the relatively high impedance presented by the human body, wet or dry, or by animals; and

    responding to said current-sensing to apply substantially full predetermined supply voltage for current-sensed impedance values corresponding to the relatively low impedance presented by appliances, including those presenting inductive loads.

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