| 摘要 |
<p>The device controlling sun-screening units has vertical slats, with electric motor driven for swivelling them and photo-electric control ensuring that their surfaces are always vertical to sun rays. The sensor for this is a rotating body with photo elements and with electric motor drive, the drive for the slats being synchronised with its own drive. It regulates switchgear effecting return swivelling of slats through approx. 180 deg. when these reach their final setting. This enables sytems, with slats turning only through a semicircle, to be used on any side of a building.</p> |
