Lock assembly

An apparatus, comprising:

• a lock assembly being configured to be selectively coupled to a selectively-movable lock member of a mortise-cylinder housing of a mortise cylinder, in which a building has a stationary wall, and in which a stationary door frame is configured to be mounted to the stationary wall of the building, and in which a movable door is configured to be mounted to the stationary door frame, and in which the movable door is also configured to be selectively movable between a door-closed condition and a door-open condition, and in which a latch housing is configured to be mounted in an edge section of the movable door in such a way that the latch housing, in use, faces the stationary door frame once the latch housing is mounted in the edge section of the movable door, and once the movable door is moved from an open-door condition to a closed-door condition, and in which the latch housing supports a latch device, and in which the latch device is configured to selectively latch with the stationary door frame once the latch housing, in use, is mounted in the edge section of the movable door, and once the latch housing, in use, faces the stationary door frame in such a way that the latch device, in use, securely prevents movement of the movable door away from the stationary door frame, and the movable door, in use, remains in the door-closed condition with the latch device placed in a latched condition, and in which the latch device is configured to selectively unlatch from the stationary door frame in such a way that the latch device, in use, permits free movement of the movable door away from the stationary door frame, and the movable door is movable to the door-open condition with the latch device placed in an unlatched condition, and in which the mortise-cylinder housing is configured to be selectively receivable by, and supportable by, and selectively removable from, the latch housing, and in which the mortise-cylinder housing supports the selectively-movable lock member, and the selectively-movable lock member is configured to interface with the latch device of the latch housing once the mortise-cylinder housing, in use, is received by, and supported by, the latch housing;
• and
• the lock assembly including visible symbols being configured to be selectively movable in such a way that the visible symbols, in use, urge the selectively-movable lock member of the mortise-cylinder housing of the mortise cylinder to move from a locked state to an unlocked state.

An apparatus, comprising:

• a building having a stationary wall;
• and
• a stationary door frame being configured to be mounted to the stationary wall of the building;
• and
• a movable door being configured to be mounted to the stationary door frame, and also configured to be selectively movable between a door-closed condition and a door-open condition;
• and
• a latch housing being configured to be mounted in an edge section of the movable door in such a way that the latch housing, in use, faces the stationary door frame once the latch housing is mounted in the edge section of the movable door, and once the movable door is moved from an open-door condition to a closed-door condition;
• and
• the latch housing being configured to support a latch device;
• and
• the latch device being configured to selectively latch with the stationary door frame once the latch housing, in use, is mounted in the edge section of the movable door and once the latch housing, in use, faces the stationary door frame in such a way that the latch device, in use, securely prevents movement of the movable door away from the stationary door frame, and the movable door, in use, remains in the door-closed condition with the latch device placed in a latched condition;
• and
• the latch device being configured to selectively unlatch from the stationary door frame in such a way that the latch device, in use, permits free movement of the movable door away from the stationary door frame, and the movable door is movable to the door-open condition with the latch device placed in an unlatched condition;
• and
• a mortise-cylinder housing of a mortise cylinder, in which the mortise-cylinder housing is configured to be selectively receivable by, and supportable by, and selectively removable from, the latch housing;
• and
• the mortise-cylinder housing supporting a selectively-movable lock member, and the selectively-movable lock member being configured to interface with the latch device of the latch housing once the mortise-cylinder housing, in use, is received by, and supported by, the latch housing;
• and
• a lock assembly being configured to be selectively coupled to the selectively-movable lock member of the mortise-cylinder housing of the mortise cylinder;
• and
• the lock assembly including visible symbols being configured to be selectively movable in such a way that the visible symbols, in use, urge the selectively-movable lock member of the mortise-cylinder housing of the mortise cylinder to move from a locked state to an unlocked state.