| 摘要 |
System for operting a blind in a glass-enclosed chamber the ends of the said blind being respectively fitted to a fixed upper box (40) and to a movable b ox (60), subjected to a guide device for translation, parallel to itself, when opening and closing said blind by a pair of cords (85, 86) interacting betwe en the fixed (40) and movable (60) boxes and a lower fixed box (50), and also t o a pulling device comprising a small box containing permanent magnets fixed t o the movable box (60) and a free knob, containing permanent magnets of opposi ng pole, so that by matching, through a pane of glass, the magnets in said knob with those fixed to the movable box (60), the blind can be opened or closed as desired. |
