| 摘要 |
A safety deposit box lock assembly has a housing and latch bolt carried by the housing. The latch bolt is movable between a locked and an unlocked position relative to the housing. A guard lock is provided as part of the lock assembly and is movable by a guard key between an unsecured orientation and a secured orientation. The guard lock permits movement of the latch bolt to the unlocked position when the guard lock is in the unsecured orientation. The guard lock prohibits movement of the latch bolt to the unlocked position when the guard lock is in the secured orientation. A patron lock is provided as part of the lock assembly and is movable by a patron key between a latched orientation and an unlatched orientation. The latch bolt is in the locked position when the patron lock is in the latched orientation. The latch bolt is in the unlocked position when the patron lock is in the unlatched orientation. However, the patron lock can be moved to the unlatched orientation only when the guard lock is in the unsecured orientation. The guard lock is a passive lock wherein the guard key can be inserted into and removed from the guard lock both when the guard lock is in the secured orientation and in the unsecured orientation.
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