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Electronic access control device

  • US 20040178885A1
  • Filed: 03/24/2004
  • Published: 09/16/2004
  • Est. Priority Date: 11/15/1994
  • Status: Active Grant
First Claim
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1. An electronic access control device comprising:

  • a circuit having a portion deactivated during a first time period;

    the portion of the circuit enabled during a second time period, the portion of the circuit having an enable output signal generated in response to a sensed electromagnetic signal;

    the portion of the circuit being enabled for an extended time period that is greater than the second time period;

    the portion of the circuit having an input code output generated in response to the electromagnetic signal and during the extended time period;

    a microprocessor having an unlock output signal generated if the input code matches the access code; and

    , an electromechanical driver having an output signal generated in response to the unlock signal.

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