Mortise lock

A mortise lock, the lock comprising:

• a housing;
• a latch bolt mounted in the housing for movement relative to the housing between an extended position where a portion of the latch bolt extends outside of the housing and a retracted position where the latch bolt is inside of the housing;
• a deadbolt mounted in the housing for movement relative to the housing between a retracted position where the deadbolt is inside the housing and an extended position where a portion of the deadbolt extends outside of the housing;
• first means for moving the deadbolt between the retracted and extended positions of the deadbolt;
• second means for moving the latch bolt to the retracted position of the latch bolt and the deadbolt to the retracted position of the deadbolt, the second moving means including a moveable member in the housing;
• a blocking element mounted in the housing for movement between a first position and a second position, the blocking element adapted in the second position of the blocking element to prevent movement of the moveable member;
• a locking lever moveably mounted in the housing, the locking lever operatively connecting the deadbolt and the blocking element so that when the deadbolt is moved from the retracted position to the extended position of the deadbolt, the blocking element is moved from the first position to the second position of the blocking element;
• a latch lever moveably mounted in the housing, the latch lever operatively connecting the first moving means and the locking lever when the blocking element is in the second position of the blocking element and the deadbolt is in the retracted position of the deadbolt for moving the blocking element to the first position by operation of the first moving means;
• and
• a securing member disposed inside the housing and releasably attached to the latch bolt, the securing member moveable relative to the housing between a first position and a second position so that in the first position of the securing member the latch bolt is in the retracted position and in the second position of the securing member the latch bolt is in the extended position and a portion of the latch bolt remains within the housing, and wherein the second moving means operates to move the securing member to the first position.

A security mechanism for a mortise lock assembly of the type comprising a housing for accommodating the lock components including the security mechanism, a latch bolt mounted in the housing for movement relative to the housing between an extended position where a portion of the latch bolt extends outside of the housing and a retracted position where the latch bolt is inside of the housing, a deadbolt mounted in the housing for movement relative to the housing between a retracted position where the deadbolt is inside the housing and an extended position where a portion of the deadbolt extends outside of the housing, first means for moving the deadbolt between the retracted and extended positions of the deadbolt, second means for moving the latch bolt to the retracted position of the latch bolt and the deadbolt to the retracted position of the deadbolt, the second moving means including a moveable member in the housing, a blocking element mounted in the housing for movement between a first position and a second position, the blocking element adapted in the second position of the blocking element to prevent movement of the moveable member, a locking lever moveably mounted in the housing, the locking lever operatively connecting the deadbolt and the blocking element so that when the deadbolt is moved from the retracted position to the extended position of the deadbolt, the blocking element is moved from the first position to the second position of the blocking element, the security mechanism comprising:

• am arm member integral with the locking lever,
• and a latch lever moveably mounted in the housing, the latch lever adapted to operatively interengage the first moving means and the arm member when the blocking element is in the second position of the blocking element and the deadbolt is in the retracted position of the deadbolt so that the blocking element is moveable to the first position by operation of the first moving means.

A mortise lock, the lock comprising:

• a housing;
• a latch bolt mounted in the housing for movement relative to the housing between an extended position where a portion of the latch bolt extends outside of the housing and a retracted position where the latch bolt is inside of the housing;
• a deadbolt mounted in the housing for movement relative to the housing between a retracted position where the deadbolt is inside the housing and an extended position where a portion of the deadbolt extends outside of the housing;
• a manually operable actuator extending inwardly from the exterior of the housing for moving the deadbolt between the retracted and extended positions of the deadbolt, the actuator including a cam disposed in the housing for movement about an axis;
• a manually operable latch operator accessible from the exterior of the housing;
• a hub journalled for rotation in the housing and keyed to the latch operator;
• a retractor arm operably connected between the hub, the latch bolt and the deadbolt for moving the latch bolt to the retracted position of the latch bolt and the deadbolt to the retracted position of the deadbolt upon rotation of the latch operator and hub;
• a blocking element mounted in the housing for movement between a first position and a second position, the blocking element spaced from the hub in the first position of the blocking element and adapted to engage the hub in the second position of the blocking element to prevent rotation of the hub and latch operator;
• a rigid locking lever mounted in the housing for pivotal movement about a pivot axis which extends transversely to the direction of movement of the locking lever, the locking lever including first, second and third arms extending radially outwardly from the pivot axis, the first arm operatively connected to the blocking element so that the locking lever pivots between a first position and a second position when the blocking element moves between the first position and second position of the blocking element, and the second arm positioned adjacent the deadbolt, the deadbolt having an engagement surface which engages the second arm when the deadbolt moves from the retracted position to the extended position for pivoting the locking lever to the second position of the locking lever causing the locking lever to drive the blocking element to the second position;
• and
• a rigid latch lever mounted in the housing for pivotal movement from a first position to a second position about a pivot axis which extends transversely to the direction of movement the latch lever, the latch lever including first and second arms extending outwardly from the pivot axis, the first arm of the latch lever engaging the third arm of the locking lever when the latch lever is in the first position and the blocking element and locking lever are in their second positions and the deadbolt is in the retracted position of the deadbolt, the second arm of the latch lever in the path of movement of the cam when the latch lever is in the first position of the latch lever so that operation of the manual actuator moves the latch lever to the second position and the latch lever pivots the locking lever to the first position of the locking lever causing the locking lever to drive the blocking element to the first position freeing the hub and latch operator for rotation.