| 摘要 |
A louvre shutter or door, of a type having a rectangular frame work, consisting of side frames and top and bottom frames, and slats extending from side to side and hollow extrusions forming the side frames, defining inner walls and outer walls, and side walls pivots at each end of the slats, recesses in the inner walls the side frames, with pivot of the slats extending through respective recesses, gears secured to the pivots extending through recesses in one of the side frames, and, a rack interconnecting the gears so that movement of one of the slats, will be transmitted to all of the slats. Also disclosed is a louvre shutter for a fanlight with wedge shaped slats, having a variable profile.
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