| 摘要 |
A ceiling fan comprising an electric motor that drives a circular plate, the circular plate has three or four equally spaced quadrants positioned adjacent its periphery each quadrant is secured to the plate to be pivotal thereto to provide limited acuate movement about the pivot axis, each quadrant having a fan blade secured thereto, the acuate movement of each quadrant being confined from a first position where the blades are within the periphery of the plate to a second position where the blades extend raidally outwardly at the plate, each quadrant being attached to the plate by a coil spring which urges the quadrant into the first position, each quadrant being directly joined to the adjacent quadrant by a rigid tie bar so that any movement of one quadrant causes the same movement of all the other quadrants. |
