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Security structure unlocking system for use by emergency response personnel

  • US 5,955,947 A
  • Filed: 12/12/1996
  • Issued: 09/21/1999
  • Est. Priority Date: 12/12/1996
  • Status: Expired due to Term
First Claim
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1. A secure structural assembly comprising:

  • a movable security structure having a closed, locked position and an opened, unlocked position;

    a lock assembly formed to lock said movable security structure in its closed position;

    an unlocking mechanism coupled to and formed for unlocking of said lock assembly;

    an authorized user input device coupled to the unlocking mechanism and formed to unlock the lock assembly in response to an authorized user input through said user input device; and

    a separate security structure-opening assembly coupled to said unlocking mechanism at a position bypassing said authorized user input device and including a reduced sensitivity radio frequency receiver responsive to at least one of a short duration radio frequency signal transmitted only from a limited range away from said receiver on a restricted radio frequency, and said security structure-opening assembly further being responsive only to detection of said signal in said radio frequency to actuate said unlocking mechanism;

    said reduced sensitivity radio frequency receiver is a scanner formed to scan a plurality of restricted emergency radio frequencies to detect the presence of pulsed signals within a known time interval on one of said restricted emergency radio frequencies.

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