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Automatic electricity control monitoring exit/entry device

  • US 4,723,192 A
  • Filed: 07/05/1985
  • Issued: 02/02/1988
  • Est. Priority Date: 07/05/1985
  • Status: Expired due to Fees
First Claim
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1. An apparatus for controlling a power supply line in a building comprising;

  • entry detection means including an infrared detector for producing detection signals in response to an entry into the building by a human being;

    exit detection means including an infrared detector for producing detection signals in response to an exit out of the building by a human being;

    counting circuit means for counting and producing signals from the detection signals produced by the entry and exit detection means;

    switch means for presetting counting data;

    comparator for comparing the signals produced by the counting circuit means and those produced by said means for presetting counting data;

    controller circuit emans for receiving the on-off signal and for controlling the power supply line.

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