FIELD: construction engineering; devices for controlling optical transmission through window blocks. SUBSTANCE: window blind is wound on drum installed between glasses of window block. Twisted rubber cord provided with metal ring in the middle is installed inside drum. Cleat is placed on lower end of blind and coupled with control rod, fish line, roller, through bushing, and clamp. Blind may be made of metal-coated semi-transparent or nontransparent polymeric films, synthetic and other non-transparent fabric of monotonous or decorative color to fit room interior. EFFECT: improved uniformity of blind displacement without opening the window block. 1 dwg
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Authors
Dates
2002-01-27—Published
2000-04-27—Filed