FIELD: construction engineering. SUBSTANCE: window has main frame and another frame suspended by hinges to top of main frame. Also provided is handle for lifting of frame which is inserted between main frame and suspended frame. One end of this handle is connected with possibility of turning to side part of main frame. Other end of handle is connected with possibility of turning to movable slides. Slides are connected to corresponding side part of aforesaid main frame and suspended frame. Movable slides are linked with preliminarily tensioned window raising spring. Installed between movable slides and window raising spring is axial spring. Preliminary tension of axial spring is adjusted depending on angle of roof sloping so as to increase force which is created by window raising spring within preset range of window opening angles. Window is easily opened and remains in open position irrespective of opening angle. EFFECT: higher efficiency. 1 cl, 5 dwg
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Authors
Dates
1999-02-20—Published
1994-12-09—Filed