Patent ID: 8234892

Claim:
A mortice lock having a lock casing which provides at least one first point of entrapment and at least one second point of entrapment, a latch bolt which can move between a latching position and an un-latching position, a handle for moving the latch bolt between the latching position and the un-latching position a key cylinder, an operating assembly that can move between a first position in which a deflectable portion of the operating assembly engages with the at least one first point of entrapment and a second position in which the deflectable portion engages with the at least one second point of entrapment, wherein only the key cylinder can move the operating assembly between the first position and the second position, and a locking member that can move between a locking position in which a portion of the locking member prevents the latch bolt from moving into the un-latching position, and an unlocking position in which the latch bolt can move into the un-latching position wherein the locking member is operatively associated with the operating assembly such that moving the operating assembly into the first position moves the locking member into the unlocking position and moving the operating assembly into the second position moves the locking member into the locking position.