COMPOSITE WINDOW WITH TWO WINGS AND THREE WINDOW-PANES

摘要

The invention relates to a coupled window having two casings hinged to each other and an intermediate pane located between said casings. The intermediate pane is at one edge thereof secured to hinge flaps carried on the same hinge pins as the hinges connecting the casings to each other, and at the opposite edge the intermediate pane is provided with one single switch coupling co-operating with counterplates in the inner and outer casings, respectively, in such a manner that the intermediate pane may be alternatively coupled to the inner casing or to the outer casing or to both casings.