Multi-Point Door Lock

摘要

A door lock has a latch which is rotatable from a retracted position to an extended position by means of a linkage. A safety button extends from the latch when the latch is retracted. The linkage cannot be moved unless the safety button has been pressed, which occurs when the door is adjacent the door frame. This prevents the latch from extending and so damaging the keeper in the door frame. The linkage also has a notch which cooperates with a tang projecting from the housing. The tang an notch prevent the latch from being rotated from the extended position to the retracted position except by operation of the linkage. This feature makes it difficult to force the lock open without a key. In addition, one or more remote locks may be added to the main lock. With two remote locks it is possible to provide three anchor points for a door. Further, the remote locks are individually adjustable so that the reach of the latches can be varied to suit the configuration of the door frame or door, and so to accommodate irregularities due to installation or warpage. One of the remote locks can rotate in the opposite direction from the main lock so that the door cannot be lifted off its track.