초록 ▼

A window for an aircraft cabin has a first pane (3) with a high fatigue strength on the inside facing the cabin and a second pane (4) with a lower fatigue strength smaller than the first fatigue strength on the outside facing the atmosphere. The space (3A) between the window panes (3, 4) is sealed b

A window for an aircraft cabin has a first pane (3) with a high fatigue strength on the inside facing the cabin and a second pane (4) with a lower fatigue strength smaller than the first fatigue strength on the outside facing the atmosphere. The space (3A) between the window panes (3, 4) is sealed but connected through a pipe to an air pressure controller responsive to the atmospheric pressure. The pressure controller may be an air pump (12) or variable volume chambers (19, 20) for keeping the pressure in the space between the panes at the prevailing atmospheric pressure without actually venting the space to the atmosphere.

대표청구항 ▼

[ What is claimed is:] [1.] An aircraft cabin window construction for a pressurizable aircraft cabin, said window construction comprising a window frame (2), a main inner window pane (3) held in said frame next to said cabin, said inner window pane having a first fatigue strength for taking up all o

[ What is claimed is:] [1.] An aircraft cabin window construction for a pressurizable aircraft cabin, said window construction comprising a window frame (2), a main inner window pane (3) held in said frame next to said cabin, said inner window pane having a first fatigue strength for taking up all operational loads, an auxiliary outer window pane (4) having a second fatigue strength smaller than said first fatigue strength, wherein said second outer window pane (4) is mounted in said window frame (2) outwardly spaced from said main inner window pane (3) to enclose a space (3A) between said inner and outer window panes (3 and 4), a seal (5) positioned between said window frame (2) and said inner and outer panes for sealing said space (3A) against said pressurized aircraft cabin and against the atmosphere outside said aircraft cabin, a pressure control device (12, 16), an air conduit (10, 11) connecting said pressure control device to said space (3A) between said inner and outer window panes (3, 4) for maintaining external atmospheric pressure inside said space (3A) and a pressure differential across said outer window pane (4) is avoided to relieve said outer window pane (4) with said smaller fatigue strength of all stress that could be caused by such pressure differential, and air treatment means connected to said pressure control device (12, 16) for maintaining said external atmospheric pressure in said space (3A) with clean and dry air.