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.
- ‘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.’
- ‘Weights are added to the differential windlass to achieve a desired preload in the belts.’
- ‘What do the wheel and axle and the differential windlass have in common?’