Abstract: Lock assembly particularly suitable for use on rental storage spaces and the like. The assembly includes a lock bolt which is movable between extended and retracted positions and a slide plate which can move with the bolt. The slide plate is normally locked in a fixed position by a lock which is controlled by the owner of the rental space. The renter can lock the bolt to the slide plate to secure the space. The owner-controlled lock permits the owner to release the slide plate and retract that plate along with the bolt to gain access to the space with the renter's padlock in place. This lock also permits the owner to lock the bolt in the extended position so that the renter will no longer have access to the space even though he may remove his padlock.

Abstract: A locking mechanism is provided having a frame for mounting on a door or other closure. A movable bolt is supported on the frame for movements between extended and withdrawn positions. An additional member is mounted on the frame for slidable movements generally parallel to the bolt. At least two locking means are incorporated into the locking mechanism, the first of which releasably connects the bolt to the member, and the second of which releasably positions the member with respect to the frame. With the first locking means engaged, the bolt is movable together with the member. With both the first and second locking means engaged, the bolt is locked in the extended position. A securing means engagable with the first locking means prevents release of the first locking means. The locking mechanism is particularly adapted for use on storage compartments wherein a renter of the compartment will gain access by way of the first locking means and the owner will gain access by way of the second locking means.