| 摘要 |
A mortise lock having an entrance and apartment function and including a spring projected latch bolt, a latch bolt retracting mechanism having an L-shaped retractor rectilinearly moveable in response to rotation of either an inner or an outer rollback hub, a snap action toggle operated stopworks for locking the outer rollback hub, and a deadlocking mechanism including a deadlocking lever controlled by an auxiliary bolt and moveable into and out of blocking relation with the latch bolt in its projected position. An abutment on the deadlocking lever cooperates with an abutment on the lock case when the deadlocking lever is in its deadlocking position to resist transmission of force applied to the latch bolt in a retracting direction.
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