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Electronic lock system with audible entry monitor

  • US 4,463,349 A
  • Filed: 09/29/1982
  • Issued: 07/31/1984
  • Est. Priority Date: 10/02/1981
  • Status: Expired due to Term
First Claim
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1. An electronic lock system comprising:

  • a lock mechanism including an actuator;

    a pushbutton input unit having a plurality of push buttons for entry of an input code;

    a memory for storing a preset code which is read out in response to entry of said input code;

    a comparator for comparing said input code with said preset code and producing a driver signal for operating said actuator when said input code matches said preset code;

    an audible signal generator for confirming entry of input code whenever one of said push buttons is depressed; and

    a counter means associated with said audible signal generator for counting occurrence of entry of code elements of said input code and producing a disabling signal for disabling said audible signal generator for a predetermined time when the counter value exceeds a given threshold.

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