Apparatus for locking the leaf of a swing door

In an apparatus for locking a swing door leaf with respect to a door frame comprising a turnable shaft, an arm operatively connecting said shaft with said leaf, and drive means for rotating said shaft to open and close the door leaf, said drive means producing slight axial movement of said shaft as said door leaf appoaches the closed position, the improvement comprising locking apparatus including first and second locking elements respectively on the door frame and door leaf, said locking elements coming into confronting relation when the door leaf approaches the closed position, said locking elements including respective wedge-shaped nose portions which interengage and lock the locking elements when the door leaf is closed and the shaft is axially moved, one of said locking elements including an axial extension overlapping the nose portion of the other locking element to form an abutment for said other locking element to limit the degree of angular closure of the door leaf.