SIMULTANEOUSLY LOCKING AND UNLOCKING DEAD BOLT AND LOCK LATCH WITH PANIC UNLOCKING

摘要

SIMULTANEOUSLY LOCKING AND UNLOCKING DEAD BOLT AND LOCK LATCH WITH PANIC UNLOCKING Extending a dead bolt into a locked position turns a crank that releases a lock release plate from an unlocked position which in turn releases a slide. Upon its release, the slide responds to springs and forces a tooth into a notch of an actuator to lock a latch bolt. To unlock the latch bolt and the dead bolt, the dead bolt can be directly retracted, whereupon the crank engages the lock release plate to move it back to its unlocked position. The lock release plate during this travel picks up the slide and withdraws the tooth from the actuator, freeing the latch bolt assembly. When locked, the latch bolt and the dead bolt can be simultaneously unlocked by rotation of an inside operator which produces rotation of a doublelobed cam. One lobe of the cam moves the slide against the force of the springs sufficiently to clear the tooth from the actuator. The cam continues to move the slide so that the slide engages the crank and rotates the crank to retract the dead bolt and force the crank into its unlocked position in a detent of the lock release plate. The force of the springs on the detent maintains the crank in its unlocked position. After the tooth clears the actuator, a dog on the cam picks up the actuator to rotate it and withdraw the latch bolt. For lever-actuated outside operations, the actuator has a finger engageable by the slide that in turn follows the rotation of the double-lobed cam. A lost motion space between the roller and the finger permits withdrawal of the tooth from a notch in the actuator prior to rotation of the actuator.