Vertical louver type window drape

作者: H Shapiro

DOI:

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摘要: A window draw drape adapted to be supported in the manner of a vertical blind and having alternate light impeding transmitting sections, sections being for linear rotational movement about respective axes. The may selectively rotated positions permit transmission through said or wherein overlap each other substantially block drape.

参考文章(5)
Higbie Henry Harold, Material for controlling illumination ,(1928)
Leslie K Loehr, Adjustable blind or screen ,(1936)
Ernest F Taylor, Window blind construction ,(1958)