| 摘要 |
A deadbolt lock mechanism of the single cylinder type is disclosed having a latch bolt which is movable between extended and retracted positions by a cylinder lock at one side thereof or by rotation of a thumbturn at the other side. With the latch bolt in the retracted position, the thumbturn is axially movable between operative and inoperative positions. In the operative axial position of the thumbturn, the thumbturn is operatively coupled to the latch bolt for operation thereof. In the inoperative axial position of the thumbturn, the thumbturn not only is operatively uncoupled from the latch bolt but also is prevented from rotation.
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