differential windlass definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a windlass with two drums of different diameters providing a mechanical advantage
differential windlass definition by American Heritage Dictionary
A hoisting device that has two drums of different sizes on the same axis. A line wound on the larger and unwound from the smaller drum provides extra lifting power. Also called Chinese windlass.
A differential windlass requires minimum effort to lift considerable weight.