Abstract: A floor door lock for restricting movement of a pivotal or sliding door relative to a floor, which inserts a lock pin into a pin-receiving opening in the floor. The door carriers an adapter fixed to its bottom side, the adapter having a chamber (42) therein, a pivotal arm (44) pivotally connected to the housing within the chamber, the lock pin connected to the bottom of the pivotal arm, and blocking means (46) for bearing against the arm (44) to retain the lock pin in the door-locking position in the receiving opening in the floor. The adapter arrangement also allows the door to be converted from a sliding door to a pivotal door, and vice versa.

Abstract: A sliding door apparatus for installation in a structural opening, having overhead runway rails with tracks or runways in which guide rollers of the sliding doors are mounted in a displaceable arrangement, additional cylindrical guide pins (pilots) (14) being provided as guides on switches which project downwardly into the runways (20) and which have centers that lie on assumed center lines of the runways (20).