Automatic aeration window

Claim 1

In a window equipped with three parallel window panes and an aeration circuit comprising: a fixed frame and a mobile frame formed of three frame elements consisting of an outer frame element and an inner frame element respectively supporting an outer pane, an intermediate pane and an inner pane defining therebetween two parallel gaps communicating via a first upper slit at the top of a first gap formed between said outer and inner panes, an upper intermediate passage and second upper slit at the top of a second gap between said intermediate and inner panes; an external opening at the outer face of the window communicating with a first lower passage and a first lower slit at the bottom of said first gap, and an internal opening at the inner face of the window communicating with a second lower passage and a second lower slit at the bottom of said second gap; and flap means associated with control means; the improvement wherein said three frame elements forming said mobile frame are respectively arranged so that said outer and intermediate frame elements define said first upper and lower slits with said first gap therebetween, and said intermediate and inner frame elements define said second upper and lower slits with said second gap therebetween, wherein said upper intermediate passage extends within said mobile frame above said intermediate frame element and between said outer and inner frame elements; and wherein said fixed frame contains in the bottom part thereof said external opening, said first lower passage and a first lower opening which are so arranged in the fixed frame that said external opening may communicate with the bottom of said first gap via said first lower passage and said first lower opening in the fixed frame and said first lower slit in the mobile frame and wherein said fixed frame further contains a flap and said control means which are thereby operatively associated with said external opening within said fixed frame.