| 摘要 |
A lift system for top-down, bottom-up window shades operated by a single control is provided. The preferred embodiment of the invention is compatible with, but not limited to, clutch operated shades whose cords are wound onto a shaft within the headrail. It will work with any shade that presently has top-down-bottom-up capability, using any method of lift. The system consists of a headrail (1) and a cord (3, 35, 37) which wraps on a shaft (11) located within the headrail (1). The cord (3, 35, 37) extends from shaft (11) and extends around a series of rollers (15, 17, 19, 21, 43, 45, 47). Rotation of the shaft (11) operates the cord (3, 35, 37) to move rails (5, 9, 27, 31, 47) thereby manipulating fabrics (7, 25, 29).
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