An access opening closure device is provided for enabling passage of food or medication into a confined space without providing direct access from within the confined space to outside of the confined space. The device includes a housing assembly including a body and a cover, and a slide assembly including an access door and a frame. The body defines a receptacle and first and second openings. The housing assembly is pivotally coupled to the slide assembly and is movable from an operative position to a stowed, non-operative position.

The present application provides a lock (100) for a door. The lock comprises a housing (102), a lock mechanism (108), and a bolt (104). An end portion (112) of the bolt comprises a trigger (106). The lock mechanism is operable to move the bolt between a locked position in which the end portion extends through an opening in the housing and projects from the housing, and an unlocked position in which the end portion is within the housing. The lock further comprises a retraction mechanism (110), wherein actuation of trigger causes the retraction mechanism to automatically move the bolt from the locked position into the unlocked position.

A bolt assembly usable in a mortise lock. The assembly includes a bolt and tailpiece that are pivotable relative to one another. In one embodiment, the bolt and tailpiece are joined by a pin that permits the components to pivot relative to one another.

A door lock system includes a shaft and a cam. The cam is supported on the shaft for rotation with the shaft, and for movement along the shaft throughout a range of door lock release locations. A selector engages the cam to move the cam along the shaft upon rotation of the selector. An actuator lock has a closed condition blocking rotation of the shaft, and has an open condition permitting rotation of the shaft. The actuator lock prevents rotation of the cam at any of the door lock release locations when the actuator lock is in the closed condition.

A door lock system includes a shaft and a cam. The cam is supported on the shaft for rotation with the shaft, and for movement along the shaft throughout a range of door lock release locations. A selector engages the cam to move the cam along the shaft upon rotation of the selector. An actuator lock has a closed condition blocking rotation of the shaft, and has an open condition permitting rotation of the shaft. The actuator lock prevents rotation of the cam at any of the door lock release locations when the actuator lock is in the closed condition.

In a high-security sliding-door apparatus for closing and opening a corridor, the door having (a) a door frame having a track and a bi-directional effector, (b) a carriage having track-engaging rollers, (c) a slide plate slidably secured to the carriage and driven by the effector, and (d) a controller controlling slide-plate movement and enabling the door to be continuously closed but not locked, the improvement comprising centering apparatus for relative positioning of the slide plate and carriage, the centering apparatus including (1) a yoke attached to the slide plate at a yoke pivot and having a yoke cam surface thereabove, (2) a carriage-attached yoke-cam follower, and (3) springs having proximal ends attached to the yoke spaced above the yoke pivot and distal ends each attached to the carriage at points offset from the yoke pivot in opposite lateral directions, centering the door with the slide plate when unlocked.

An anti-ligature handle and escutcheon mechanism mountable on a door for operating a lock for securing the door. The mechanism comprises a handle movable between open and closed positions, the handle having a smoothly curved outer surface to prevent the attachment of a ligature thereto and comprising a pivot at a first end for rotating the handle between the open and closed positions to operate the lock. An escutcheon fixed relative to a backing plate is oriented for mounting parallel to the door when the mechanism is mounted on an outer surface of the door, wherein the escutcheon surrounds the handle and defines a recessed area within which the handle pivots. The handle further has a second end including a guide which is trapped beneath and slides along an arcuate edge of the recessed area of the escutcheon to maintain flush contact between a mating surface of the handle and the backing plate to prevent ligatures from being inserted therebetween as the handle rotates to operate the lock. The mechanism further comprises a mounting plate disposed between the backing plate and an inner surface of the door when the mechanism is mounted on the outer surface of the door, the mounting plate fixed relative to the escutcheon and backing plate.

In a high-security sliding-door apparatus for closing and opening a corridor, the door having (a) a door frame having a track and a bi-directional effector, (b) a carriage having track-engaging rollers, (c) a slide plate slidably secured to the carriage and driven by the effector, and (d) a controller controlling slide-plate movement and enabling the door to be continuously closed but not locked, the improvement comprising centering apparatus for relative positioning of the slide plate and carriage, the centering apparatus including (1) a yoke attached to the slide plate at a yoke pivot and having a yoke cam surface thereabove, (2) a carriage-attached yoke-cam follower, and (3) springs having proximal ends attached to the yoke spaced above the yoke pivot and distal ends each attached to the carriage at points offset from the yoke pivot in opposite lateral directions, centering the door with the slide plate when unlocked.

A locking system that has an opening in a door adapted and arranged for receiving a lock bolt and a lock fixed in a wall for actuating a lock bolt adapting and arranged for being received by the opening in the door when the door is closed. Alternatively, the locking system is mounted on the exterior of the detention cell door and the adjacent exterior cell wall. The locking system further comprises a blocking strip protruding from a door jamb, the strip coupled to the door jamb, the strip coupled to the door jamb and positioned adjacent the lock bolt for blocking access to the lock bolt between the door and the doorjamb. The locking system further comprises a system for monitoring and reporting the status of a detention cell door, the lock bolt, and the roller bolt.

An electromechanical lock which is configured to provide a mechanical latch holdback feature, whereby a key is useable to retract a latch of the lock, the key can be removed, and the latch remains mechanically held back. The held back latch is remotely releasable. As such, a correctional officer can use his key to mechanically hold back the latch, such that the lock remains open. Subsequently, a control signal can be sent from a remote location causing the latch to be released and extended, such that the lock locks. This ability to remotely override the mechanical latch holdback is useful in a correctional facilityfor example, when the mechanical latch holdback has been engaged for cell doors and an emergency situation arises where a quick remote lockdown may be necessary, instead of having to perform the time-consuming task of re-locking the doors one-by-one, locally by key.