| 摘要 |
The failsafe security lock system of this invention utilizes a fire rated latch bolt, which is retracted by knobs, levers or exit devices from either side of the door. The failsafe security system comprises the use of the magnetic lock or similar device which is controlled from the inside of the door by a knob, lever or exit device. The magnetic lock is controlled by use of the magnetic switch mounted in the door jamb and an internal bar magnet in the lock mounted in the door. When the inside knob, lever or exit device is activated the latch bolt is retracted and the internal magnet is removed from the magnetic switch and power is cut off from the magnetic lock, unlocking the door. To open the door from the outside power has to be cut to the magnetic lock. This is accomplished by use of a key which would remove the internal magnet from the magnetic switch locking the door. The system is totally failsafe in that if the power is cut in any way, the magnetic lock will release and the door can be opened from either side. This system can be tied into existing fire alarm systems or to a central control panel.
|
