Espagnolette or espagnolette-lock for a door, French window or the like

摘要

An espagnolette-lock for use on a leaf within a sash-frame having a casing, an operating rod movable between a locked position and an unlocked position, a controller for actuating the operating rod, a springy element for automatically restoring the operating rod to the locked position, a manual controller for moving the operating rod to the unlocked position and for restoring the springy element to a compressed condition, a locking mechanism for maintaining the operating rod in the unlocked position during an opening of the leaf from the sash-frame, and an unlocking mechanism for releasing the locking mechanism when the leaf is closed into the sash-frame so as to return the operating rod to the locked position. The locking mechanism includes a toggle joint having a first rod and a second rod connected together by a fulcrum. The first rod is connected through a hinged joint to the operating rod. The second rod is connected through a hinged joint to the casing. The fulcrum and the respective hinged joints are substantially in alignment parallel to the operating rod when the operating rod is in the unlocked position.