Patent ID: 7770422

Claim:
A lock for engaging a staple, comprising: a cylindrical cover having a front face open at a key hole aperture, a continuous side wall, and a rear side open at least at a staple slot, the cylindrical cover defining an interior space therein; a lock cylinder assembly housed within the interior space of the cylindrical cover and having a key slot in a front face thereof, a barrel rotatably captured within a cylinder, the barrel rotatable within the cylinder only when a properly-shaped key is inserted into the key slot, the barrel including a cam follower that rotates between a locked position and an unlocked position; a bolt assembly fixed at a proximal end to the cam follower and adapted so that a bolt thereof at least partially traverses the staple slot when the cam follower is moved from the unlocked to the locked position thereof, the bolt assembly sliding in a longitudinal track with the bolt; whereby with the lock engaged over the staple, the key can be inserted into the key slot and the barrel turned such that the bolt traverses the staple slot to fix the staple thereto, the bolt assembly including a slider block having a cam slot for receiving the cam follower of the barrel, the bolt fixed to the slider block such that in the unlocked position of the cam follower the bolt is substantially retracted from the staple slot and, with the cam follower in the locked position, the bolt traverses the staple slot, the slider block including a detent means for tactile feedback of the cam follower achieving the locked position, the detent means including a notch in the cam slot proximal to the bolt and a spring means biasing the slider block towards the cam follower.