Abstract: A furniture plate assembly extends over a mortise lock in a door and contains a pair of side plates extending over each side of the door, the side plates being clamped against the door by internal fasteners, the internal fasteners comprising a threaded stud which can be rotated by an adjustment member which can be operated from the edge of the door. The adjustment member can be provided with a clutch to prevent over tightening of the assembly. The threaded internal fastener provides better adjustment of the assembly than a cam type clamping device.

Abstract: A furniture plate assembly extends over a mortise lock in a door and contains a pair of side plates extending over each side of the door, the side plates being clamped against the door by internal fasteners, the internal fasteners comprising a threaded stud which can be rotated by an adjustment member which can be operated from the edge of the door. The adjustment member can be provided with a clutch to prevent over tightening of the assembly. The threaded internal fastener provides better adjustment of the assembly than a cam type clamping device.

Abstract: A rotatable disc having a tubular lock assembly including a tubular sleeve and a number of disc tumblers located within the sleeve. A side locking bar is operative to prevent rotation of the assembly relative to a body, and that bar is rendered inoperative by insertion of a correct key into the lock keyway. The disc tumblers include a number of standard tumblers and a special tumbler. The locking bar is inoperative when each standard tumbler is at a service position of rotation and the special tumbler is at either a service position or a second function position of rotation. A service key is operable to place all tumblers at the service position, and a special change key is operable to place the special tumbler at the second function position to allow removal of the barrel assembly.