| 摘要 |
A tensioning device for maintaining a pair of coacting tension lines taut includes an elongated threaded shaft, and a pair of drums rotatably mounted on the shaft so they move axially relative to the shaft as they rotate. An end of each tension line is wound around a respective one of the drums, and a load imposed upon the other end of each line rotates the respective drums about the shaft. Biasing means rotationally bias each drum in a direction opposite to the direction of the torque imparted to the drums by the load so as to take up the slack in the tension lines to maintain them taut. Stop means limit rotation of the drums imposed by the load acting on the tension lines to limit the lengths of the tension lines that run out.
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