ELECTRONIC LOCK IN CYLINDER OF STANDARD LOCK

WIPO Patent Application WO1999023332

A9

An electronic security system includes an electronic lock mechanism and an electronic key, each of which is provided with a microprocessor controller and a memory storing data including an ID code and encryption key codes. The lock microprocessor may either change ID codes stored in its memory or encrypt a seed number to be used for determining access to the lock. The key can only be used to access the lock either once or for a limited number of successive times, and must thereafter be reprogammed by a host computer to be loaded with either the proper ID code or the appropriate encryption key code for that lock. An electornic lock security system preferably includes an electronic lock including a hollow cylinder, an opening into the cylinder, a bolt movable through the opening between an extended position and a retracted position, a cam member within the cylinder, the cam member contacting the bolt to move the bolt to an unlocked position, a solenoid within the hollow cylinder, the solenoid being engageable with the cam member, an electronic lock circuit within the hollow cylinder, a plug connected to the solenoid for rotating the solenoid, the plug having a keyway for insertion of key means for rotating the plug. In addition, the system also includes a key means insertable within the keyway and having electronic means for communicating with the electronic lock circuit to operate the lock. The solenoid is a novel torque transmitting solenoid that can also be used in a variety of other environments.

CREGGER BARTON B
SCHOELL LANCE G
KINGMA STANLEY DAVID
SCHROEDER MATTHEW O

PCT/US1998/022769

August 12, 1999

October 29, 1998

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MEDECO SECURITY LOCKS (US)

G07C9/00; (IPC1-7): E05B17/00; E05B17/04; E05B47/06; E05B49/00

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