US Patent 7347463 Concealed door furniture fixing method and assembly

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.