×

ELECTRONIC LOCK SYSTEM

  • US 3,848,229 A
  • Filed: 07/20/1972
  • Issued: 11/12/1974
  • Est. Priority Date: 04/09/1971
  • Status: Expired due to Term
First Claim
Patent Images

1. An electronic lock system comprising:

  • a key including a structural member adapted for engagement with an associated lock and an electronic data memory therein having a plurality of interconnected stages operative to store an electrically alterable multiple bit key code and terminal means for coupling said key to an associated lock by which said key code can be conveyed from said electronic data memory in response to a clock signal;

    a lock adapted for operation with said key and including a receptacle for receiving the structural member of said key in operative engagement therewith;

    an electronic data memory for storing a multiple bit master code;

    means for comparing said key code stored in said key data memory with said master code stored in said master code memory;

    clock means for providing a clock signal to said key data memory to cause readout of said key code to said comparison means for comparison of said key code with said master code;

    said comparison means being operative to provide an output indication upon receipt of a key code from said key data memory corresponding to said master code; and

    logic means receiving said output indication from said comparison means and operative in response thereto to provide an output signal.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×