A hoisting device consisting of two drums of different diameters on the same axis and turning at the same rate, so that a line wound on the larger drum and unwound from the smaller drum provides a mechanical advantage in lifting. Also called Chinese windlass.
- Weights are added to the differential windlass to achieve a desired preload in the belts.
- The block and tackle mechanism of the present invention is a mechanical mechanism such as a differential windlass to accomplish a lower draw force for two full draws of the draw string than the draw force of a standard compound bow.
- They also used a differential windlass.
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