Abstract: A two point lock for securing bi-folding windows and doors in which upper and lower shoot bolt arms move in opposite directions from a central lock body upon rotation of a handle. When the arms are in their mutually extended positions, a sliding detent locking member engages the upper shoot bolt arm to secure the window or door in the closed position. The central lock body includes a rotating driver for the shoot bolt arms that is supported at both ends and is maintained in two different positions by interaction with the curved contact faces of a set of biasing pads.

Abstract: A two point lock for securing bi-folding windows and doors in which upper and lower shoot bolt arms move in opposite directions from a central lock body upon rotation of a handle. When the arms are in their mutually extended positions, a sliding detent locking member engages the upper shoot bolt arm to secure the window or door in the closed position. The central lock body includes a rotating driver for the shoot bolt arms that is supported at both ends and is maintained in two different positions by interaction with the curved contact faces of a set of biasing pads.

Abstract: A lock for a sliding door or window including a latching linkage and an inner manual lever, that allows movement of the latching linkage between a locked and an unlocked position by means of the manual lever and by operation of a inside or outside key barrel, but also allows deadlocking of the latching linkage in its locked position so that operation of the manual lever to unlock the latching linkage is prevented. It is however, desirable that the lock be operable to lock the lock from the inside by a convenient operation of the manual lever when the user is inside the house. It is further desirable that the door is able to be deadlocked by a key from the inside or the outside in a manner that prevents unlocking of the door by the manual handle, since a house owner may find it inconvenient to have to walk around the outside of their house locking the doors.

Abstract: A lock for a sliding door or window including a latching linkage and an inner manual lever, that allows movement of the latching linkage between a locked and an unlocked position by means of the manual lever and by operation of a inside or outside key barrel, but also allows deadlocking of the latching linkage in its locked position so that operation of the manual lever to unlock the latching linkage is prevented. It is however, desirable that the lock be operable to lock the lock from the inside by a convenient operation of the manual lever when the user is inside the house. It is further desirable that the door is able to be dead-locked by a key from the inside or the outside in a manner that prevents unlocking of the door by the manual handle, since a house owner may find it inconvenient to have to walk around the outside of their house locking the doors.