Abstract:
Upper and lower closets are formed at the end of a room by fastening side supports to the side walls of the room near the back wall. A track member is secured at its ends to the side supports and extends across the room from one side wall to the other. A center support is connected between the track member and the back wall and the center support along with the side supports provides subjacent support for a shelf which divides the space between the room ceiling and floor into upper and lower closets. The track member is a unitary structure and includes a set of upper tracks on which upper sliding doors ride and a set of lower tracks from which lower sliding doors are suspended. The upper doors close the upper closet and their upper ends are confined by guide means attached to the ceiling. The lower doors close the lower closet.
Abstract:
A security system for monitoring and controlling the operation of doors from a remote location includes door locks, each having a retractable latch bolt which projects into a strike and keeps the door from opening, auxiliary latching means which block the latch bolt to prevent it from being retracted by a thin object passed along the strike, operating means for manually retracting the latch bolt, and a solenoid operated locking mechanism for locking the operating means. The lock is further provided with a switch for sensing the position of the auxiliary latching mechanism and another switch for sensing the position of the locking mechanism. The two switches are connected through a contact hinge to an alarm at the remote location, while the solenoid is connected through the contact hinge to an operating switch at the remote location. The alarm is actuated not only by the sensing means but also by the hinge as it opens. The alarm can be cancelled only by closing a key-operated switch at the door so security personnel must investigate the cause for an alarm.
Abstract:
A locking device for securing a door includes an air cylinder set into the floor below the door and this cylinder contains a piston which moves a locking element between retracted and extended positions. When in the retracted position, the locking element permits the door to move, but when in the extended position, the locking element projects into the bottom of the door, securing the same. As the piston moves upwardly and approaches its extended position, the piston uncovers a port in the cylinder so that high pressure air acting on the piston is directed to a switch which is connected to a signal at a remote location for indicating that the locking element is extended. The air cylinder is energized through a solenoid valve which is also in the floor and is in series with a door-actuated switch so that the solenoid can only be energized when the door is closed.
Abstract:
A hinge wherein the leaves are pivotally secured together on a pin, one of said leaves having electricity conducting means connected thereto which contacts cooperating electricity conducting means connected to the other leaf of said hinge to permit the flow of electricity from one leaf to another when the door is in its door-closed position.
Abstract:
An apparatus for securing a door includes a latch bolt which engages the door frame when extended and prevents the door from opening. To release the door the latch bolt is retracted by manually operated operating means, and a dogging mechanism retains the operating means in a position wherein it holds the latch bolt in its retracted position. This enables the door to be opened and closed during periods of high use without operating any of the parts of the apparatus, thus reducing wear and preventing early failure. The dogging mechanism is electrically operated and is controlled from a remote location.
Abstract:
A hinge has a pair of leaves provided with aligned knuckles and connected together at the knuckles with a hollow hinge pin. Each leaf has a fluid channel extending through it and the fluid channels of the two leaves communicate through the hollow hinge pin which is secured in one of the knuckles and sealed against the other by an O-ring.
Abstract:
A hinge has two leaves held together with a hinge pin and each leaf is provided with a recess opening out of the back face thereof. A magnet is completely contained within the recess on the one leaf, while a magnetic reed switch is completely contained within the recess of the other leaf. When the hinge is closed the magnet actuates the magnetic reed switch, but not when the hinge is open, so that it is possible to maintain surveillance over a door from a remote location. Both the magnet and the switch are completely concealed when the door is either opened or closed so that it is impossible to detect their presence or to tamper with them. No special preparation of the jamb or door is required to install the hinge.