Abstract: A locking prison door movement for mounting above a prison door adjacent a prison cell for transporting and locking the prison door includes a support frame and a movable carriage mounted to the support frame for reciprocating motion relative to the support frame. A drop bar extends downwardly toward the floor of the prison and is movable between a raised unlocked position and a lowered lock position in which a lower portion of the drop bar is secured adjacent the floor of the prison. An upper lock bar is movable between a first locked position securing the movable carriage in place and a second unlocked position allowing motion of the movable carriage. A cam mechanism is provided for moving the upper lock bar and the drop bar between their locked and unlocked and is operated by the reciprocating motion of the movable carriage such that the reciprocating motion of the movable carriage causes the locking and unlocking of the drop bar and the upper lock bar.

Abstract: An institutional door lock mechanism for retrofitting existing installations with a remotely controllable/monitorable door lock and open/close position indicator is described. A hollow vertical door strike jamb extends along an outside surface of the door frame opposite a hollow vertical columnar striker plate mechanism mounted on a fronting plate of the door. A hollow vertical housing also on the fronting plate contains a first component part of a proximity/alignment detection mechanism including a magnetic reed switch. The door strike jamb is configured as a vertical riser for housing a wiring harness for the catch-extension/retraction mechanism and for the proximity/alignment detection mechanism. The catch-extension/retraction mechanism includes a motor for extending/retracting the catch, the motor being operable by a securely coded manual key placed adjacent a switch mechanism or within a keyway operatively coupled with the switch mechanism.

Abstract: A security bar providing improved security from breach is obtained with the use of a plurality of free rolling inner bars. Illustratively, three inner rolling bars, arranged in a triangular relationship, are provided inside a cylindrically hollowed out outer bar, thereby ensuring that no inner bar can be attacked simultaneously from opposing sides thereof. The inner bars may be surrounded with a ring of ball bearings to provide for their ability to roll freely in place with respect to the outer bar. Electronic monitoring of the security bar identifies attempts to breach the security bar.

Abstract: A partition panel is constructed of a movable partition wall for use in partitioning a residence space as necessary, the movable partition wall including a pair of latticework structures arranged to face each other with a predetermined spacing therebetween, the latticework structures being coupled to each other. This construction can provide a panel capable of accommodating to changes in layout and the like flexibly.

Abstract: A door locking mechanism for deadlocking a door. The door locking mechanism includes a lockhead member which includes a door stopping portion. The lockhead member is moveable from a locked position, wherein the door is double deadlocked, and an unlocked position. A vertical locking mechanism is coupled to the lockhead member, and the vertical locking mechanism deadlocks the door when the lockhead member is in the locked position. The door stopping portion of the lockhead member also deadlocks door when the lockhead member is in the locked position. A carriage assembly is engaged with the door, and the carriage assembly is engageable with the door stopping portion and moves the lockhead member from the locked position to the unlocked position. The vertical locking mechanism disengages the door when the lockhead member is in the unlocked position and the door stopping portion of the lockhead member also disengages the door.

Abstract: A frame for an electromechanical prison door lock. The frame includes multiple arrays of indicia that indicate which apertures match the locations of mounting holes in at least two locks each having a different mounting configuration. A cutout formed in a face and side member of the frame form a pocket in which one of the locks is mounted. A lock cover plate is removably mounted to the frame to cover the cutout in the face and includes an opening for a lock cylinder. A latch cover plate is carried by the lock cover plate and is positioned to cover the cutout in the side member. Cutouts are provided in the latch cover plate for a lock latch bolt and a latching roller. The frame may be installed in an opening in a cell or passage wall prior to selection of the lock type.

Abstract: A safety-locking device is disclosed which is usable with a manual override system in a secure prison cell. The safety locking device is cooperable with the existing crank mechanism and geared together such that upon turning of the crank mechanism, the locking device rotates to a locked position corresponding to the position where the individual cells can be keyed open. The safety locking device is comprised of a small drive gear which is driven by said crank mechanism, and a large driven gear or sprocket driven by the small gear, by way of a chain. A locking mechanism has a locking plunger spring loaded against the back of the larger gear such that upon reaching the position where the individual cells can be keyed open, a locking plunger locks the larger driven gear and crank mechanism from further rotation. A release mechanism allows for further rotation.

Abstract: An apparatus for the viewing of an inmate in a cell while preventing the inmate from determining if he is being observed includes a frame enclosure with means for securing the apparatus about a cell window attached to the frame structure. A two-way mirror is attached to the frame enclosure and disposed proximate the cell window. A sheet of light attenuating material is disposed in the frame enclosure in planar alignment with respect to the two-way mirror a predetermined distance therefrom to darken the area intermediate the two-way mirror and the sheet of light attenuation material. Means for viewing through the two-way mirror are provided which include a lens or a video camera and display. An optional slot allows for manual positioning of the lens to permit optimum viewing into the cell. The means for securing includes a plurality of magnets disposed around the perimeter of the frame enclosure or by use of a hook and loop fastener.

Abstract: A check mechanism is provided to regulate door speed of a roller supported sliding door as the door is manually opened or closed. The mechanism is attached to a door hanger and uses a rocker arm, which slides along a control track. The control track has elevated or offset control regions which cause the rocker arm to apply force to a brake arm through an adjustable spring. The brake arm pivots to apply braking force through a brake pad to a door roller. The control track may contain regions of no control or of lesser control to allow the door to slide freely between opening or closing regions of control.

Abstract: A check mechanism is provided to regulate door speed of a roller supported sliding door as the door is manually opened or closed. The check mechanism includes an idler arm assembly attached to a door hanger with an idler roller attached to the idler arm assembly. The check mechanism further includes a pivotable spring biased lever arm having two inclined ramp sections. As the door slides, the idler roller contacts the lever arm. The inclination of the ramp causes an increasing retardation force to be applied to the idler roller, thereby retarding the speed of the door. After the idler roller passes a point of maximum retarding force, the door becomes free wheeling until a second idler roller contacts the lever arm of a second checking mechanism which in turn slows the speed of the door.

Abstract: A multi-cabinet assembly comprises single cabinets which are arranged next to one another. The single cabinets include at least one master cabinet and one slave cabinet. All of the cabinets have a door. The multi-cabinet assembly further comprises an interlock system for the slave doors which includes at least one horizontally movable interconnecting rod, a locking means connected to the interconnecting rod for being displaced between an engagement position and a release position, and a counterlocking means for engaging said locking means in a locked position of the slave door in case said locking means is arranged in engagement position. The counterlocking means is arranged at the slave door and the interconnecting rod is movably connected with the master door for displacing the locking means.

Abstract: A mounting assembly is provided for a jail cell door. The door is suspended from a trolley and is slidable, on a fixed rail, between fully open and closed positions. Means are provided for releasably locking the door in either of those positions. Stop means at opposite ends of the rail respectively limit movement of the trolley to the closed and fully open positions. Each stop means includes a compression spring which absorbs shock forces when the door is displaced to its extreme positions. The spring means also provide a force for displacing the door from its closed or fully open positions upon release of the means locking the door in either of these positions.

Abstract: An actuation and locking mechanism for sliding prison doors or the like includes a pivotal motor assembly, a movable carriage assembly reciprocally driven by the motor assembly and carrying the door, a drop bar assembly for locking or unlocking the carriage assembly and door, control means for actuating the motor and drop bar assembly as required to open, close, lock or unlock the door, emergency release and means manually to disengage or engage the drop bar assembly and pivotal motor assembly to allow the door to be manually opened, locked opened, closed or locked closed. The components of the actuating and locking mechanism are easily installed and serviced, may be universally used for right or left hand doors with minor electrical modifications, may be readily incorporated in multiple door systems and are concealed in a fail safe mode.

Abstract: There is disclosed a door position monitoring assembly for a security door installation wherein the assembly can be adjusted and preset from the exterior of the assembly. In this regard, the monitoring assembly includes a base member with switching means carried by the base member and capable of being operated to attain a first condition and a second condition, each of which conditions can be detected by suitable circuit means. A control arm produces operation of the switching means and has one end thereof coupled for movement with said door and the other end piotally mounted to the base member.

Abstract: A prison door locking mechanism particularly suitable for use with each of a pair of sliding prison doors laterally movable into stacking or overlapping position. The door locking mechanism includes a novel pivotally mounted locking dog having a latch engageable with a door-suspending carriage to lockably restrain carriage movement. The locking dog includes a projecting arm engaged by a rack bar coupled to the carriage to insure deadlock rotation of the locking dog to its locking position.