Patent ID: 6526791
Filing Date: 2003-03-04
Classification: E05B,Y10T

Abstract:
A cylinder lock comprising:a shell; a plug having a key slot formed therein, the plug being rotatably mounted within the shell to define a shear surface between the plug and the shell; a locking pin movable between a locked position and an unlocked position, the locking pin extending across the shear surface in the locked position to lock the plug against rotation relative to the shell; a sensor pin movable between an extended position and a retracted position, the sensor pin extending at least partially into the key slot in the extended position; and a flexible coupling connected between the locking pin and the sensor pin, the coupling moving the locking pin to the unlocked position when the sensor pin moves to the retracted position, the coupling being sufficiently flexible to allow the locking pin to remain in the locked position when the sensor pin moves to the retracted position when the locking pin is blocked from moving to the unlocked position.