Patent ID: 6108188
Filing Date: 2000-08-22
Classification: E05B,G07C

Abstract:
An electronic locking system for controlling operation of a locking mechanism, comprising:a solenoid having a plunger coupled to the locking mechanism for retaining the locking mechanism in a locked condition when the plunger is in an extended position, the solenoid energizable to move the plunger to an retracted position to allow the locking mechanism to be unlocked;a control circuit for generating a modulated drive signal;an actuating circuit receiving the modulated drive signal through a wire and coupled to the solenoid for energizing thereof, the actuating circuit preventing a DC voltage applied to said wire from reaching the solenoid, the modulated drive signal having a first frequency selected to cause the actuating circuit to apply a current through the solenoid to retract the plunger in response to the modulated drive signal.