| 摘要 |
<p>A lockset is adaptable for installation at more than one backset distance including a bolt assembly (8) which has a latch member (10) and a separable drawbar (14) located within a housing assembly (30), a portion of which is also made up of two relatively movable portions. Operation of the lock is standard in so far as extending and retracting the bolt is concerned, while adjustment of the backset distance is accomplished by simultaneously adjusting the lengths of the bolt assembly and the housing assembly. Visual indication of backset distance is provided as is adaptability without the use of tools. Bolt throw disablement is provided when the lockset is in the transfer position for changing backset.</p> |
