Aperture cover for blocking electromagnetic radiation

Details Aperture cover for blocking electromagnetic radiation Aperture cover for blocking electromagnetic radiation

1991-09-26

1992-03-24

Johnson, Blair M.

Flexible or portable closure, partition, or panel

Pleating type

Lazy-tong links pivot about axes parallel to panel

160238, 361424, 455300, A47G 502

Patent

active

050978853

ABSTRACT:
An aperture covering, such as a window shade, comprises a shade body (10), a shielding member (24) provided on a shade-body periphery facing a window frame (2), and a shade-body winding mechanism (6). The shielding member (24) is conductive and contacts the window frame (2) to close the space between the shade body (10) and the window frame (2). When the winding mechanism (6) winds the shade body (10) down to cover the window frame (2) with the shade body (10), the window shade blocks electromagnetic energy inside and outside a building, while regulating light entering the building through a window.

REFERENCES:
patent: 4391865 (1983-07-01), Constance
patent: 4408255 (1983-10-01), Adkins
patent: 4633322 (1986-12-01), Fourny
patent: 4982053 (1991-01-01), Thornley et al.

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