| 摘要 |
A hoist system including elevated means having spaced contact points, carrier means disposed below the elevated means, having similarly arranged contact points, cable means operatively interconnecting the contact points for carrying the carrier means below the elevated means, means for varying the effective length of the cable means disposed at a selected contact point, one end of the cable means being fixedly secured to a selected contact point and the opposite end thereof being operatively connected to the cable length varying means whereby upon operation of the cable length varying means the effective length of the cable means will be varied correspondingly to vary the vertical displacement of the carrier means relative to the elevated means.
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