×

Electronic lock system

  • US 5,124,696 A
  • Filed: 02/11/1991
  • Issued: 06/23/1992
  • Est. Priority Date: 04/21/1989
  • Status: Expired due to Fees
First Claim
Patent Images

1. An electronic lock system comprising:

  • a plurality of locks, each of said locks having a housing, each of said locks having a communication port and having a unique lock identification number;

    a plurality of card keys, each having a communication port, having a unique card key identification number and means for information input, each said card key being coupleable with said communication port of each of said locks, so that with an appropriate input to said card key information input means, said lock opens;

    said lock having a key compartment on said housing movable with respect to said housing from a latched, locked, non-accessible position to an unlatched, unlocked, accessible position;

    a hook and a latch, one of said hook and latch being mounted on said housing and the other being mounted on said movable key compartment, said hook being engageable with said latch to retain said movable key compartment in locked position and being movable to a position wherein said hook is disengaged from said latch to permit movement of said movable key compartment;

    an electromagnet mounted in said lock housing and having a pole face, a pole plate movable in said housing with respect to said electromagnet so that said pole plate may be thrust against said pole face to said electromagnet, one of said latch and said hook being attached to said pole plate so that when said pole plate is against the pole face of said electromagnet, said latch is disengaged from said hook, means on said movable key compartment for thrusting said pole plate against said pole face of said electromagnet;

    a control circuit connected to said electromagnet for controlling said electromagnet to energize said electromagnet when said card signals lock opening so that said movable key compartment thrusts said pole plate against said electromagnet pole face to be retained against said pole face by energization of said electromagnet as motion of said movable key compartment moves said hook and said latch apart to permit movement of said movable key compartment to the unlocked position.

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