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PROGRAMMABLE ELECTRIC LOCKING SYSTEM

  • US 3,751,718 A
  • Filed: 11/16/1972
  • Issued: 08/07/1973
  • Est. Priority Date: 11/16/1972
  • Status: Expired due to Term
First Claim
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1. A programmable electric locking system including an electrically operated door latch, comprising:

  • a switch;

    a timing light visible to an operator of said switch;

    timing means for generating timing signals;

    a memory register connected to receive said timing signals for storing a binary one or a binary zero during each succeeding timing signal;

    means connecting said switch to said memory register for entering binary ones or binary zeros during each timing signal;

    means connecting said timing signal to said timing light for energizing said light to indicate to an operator when said switch may be operated to enter binary ones or binary zeros in said memory register;

    a decoding circuit connected to said memory register and responsive to a predetermined combination of binary ones or binary zeros stored in said memory register for generating an unlocking signal for energizing said electrically operated door latch.

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