| 摘要 |
A shutter device for covering windows provides two shutters, each shutter having clear and opaque areas to provide and block vision though the shutter as one panel is moved with respect to the other. The shutter device is adaptable to semicircular, circular and rectangular windows. The shutter utilizes two panel, one fixed panel mounted on widow and one moveable panel, of clear material, such as glass or plastic, each panel has alternate clear and opaque areas. When the two panels are aligned so that clear areas are adjacent (open position), there is viewing through the window. When an opaque area is aligned over a clear area, vision through the shutter (closed position) is blocked.
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