| 摘要 |
<p>An arm is affixed to the inner face of the lock cylinder and prevents the lock cylinder from being removed from the lock case. A screw attaches the arm to the lock cylinder. The lock cylinder has a cam which is also attached to the inner face of the lock cylinder and rotates to operate the lock case mechanisms. The cam, when it is rotated into a lock position, covers the head of the screw and prevents the screw from being removed. Since the cam prevents removal of the screw, the arm cannot be removed from the lock cylinder and the lock cylinder cannot be removed from the lock case.</p> |
