公开(公告)号：CA1100551A

公开(公告)日：1981-05-05

申请号：CA308367

申请日：1978-07-28

Applicant: NORRIS INDUSTRIES

Inventor： DIETRICH HAGEN ,  FANE WILLIAM J ,  POTSCHKA JOSEPH

IPC: E05B13/00 ,  E05B63/16 ,  E05C1/16 ,  E05B55/06

Abstract: A disengaging spindle locking mechanism for the latch bolt of a mortise type lock is actuated by the locking slide which is normally employed to engage a retractor hub to prevent the hub from being rotated. At the inner end of a split spindle where it is in non-rotatable engagement with the retractor hub there is a cam surface. On the inner end of a locking slide is a cam surface which cams the spindle out of engagement with the hub as hub action is blocked by the slide. Thereafter, should force be applied to the spindle, it will merely spin in place and no damage will be done to the lock mechanism such as might otherwise be done by unauthorized persons to force open the lock.