| 摘要 |
A locking device is adapted for attachment to a pre-assembled latch mechanism composed of a casing 10, a latch bolt 13 which is movable between extended and retracted positions with respect to the casing, and a manually operable handle 16 which is operatively connected to the bolt 13 by means of a rotatable spindle 15. The locking device comprises a cam member 43 mounted on the spindle 15 externally of the casing 10 for rotation with the handle, operating linkages 47 mounted externally of the casing 10 and operatively connected to the cam member 43, via 40 and 44, and dead bolts 49 which are extendable and retractable by movement of the operating linkages 47. Lobes 41, 42 on the cam member 43 provide lost motion between the cam member and the operating linkages 47. <IMAGE> |
