(under subclass 177) Device comprising a vertically guided member on the opposite side of the closure from the pivot (free side) and which is connectible to the closure for vertical reciprocation and disconnectable therefrom to permit swinging of the closure, and wherein means is provided between the guided member and the frame of the opening to restrain said member from vertical movement when said closure has been disconnected therefrom.
(1) Note. In counterbalanced windows a weight is often attached to the free stile as well as to the hinge stile and the lock prevents the free stile movement when the weight of the sash is disconnected, as in swinging movement.
