| 摘要 |
A shutter having a frame, and louvres and having a control mechanism for operating all louvres , louvre drive couplings in each louvre, at least one moveable drive connector member for connecting between each louvre drive coupling , the drive connector member being moveable between engaged and disengaged positions, and having biassing springs for the drive connectors , yieldable to permit movement of the drive connectors out of the engaged positions. |
