Building door or window closure or locking drive has actuator linkage with arm rotationally mounted on end of leaf and other end connected to frame by drive shaft

摘要

The door has a leaf (1) pivoted to a frame (3) and with a motor driven closure and locking drive attached to the frame and with an actuator linkage driven by the drive shaft closure (6). The actuator linkage has an arm rotationally mounted on the end of the leaf and with its other end connected to the frame via the drive shaft. The frame end has teeth and a rack for adjustable positioning of the closure.