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2. Worm drive - Wikipedia

   en.wikipedia.org/wiki/Worm_drive

   A worm drive is a gear arrangement in which a worm (which is a gear in the form of a screw) meshes with a worm wheel (which is similar in appearance to a spur gear). Its main purpose is to translate the motion of two perpendicular axes or to translate circular motion to linear motion (example: band type hose clamp ).The two elements are also ...

3. Chesterton Windmill - Wikipedia

   en.wikipedia.org/wiki/Chesterton_Windmill

   The arched tower covers a very small diameter of 22 feet 9 inches (6.93 m) and it has an "in cap" winding gear unusual for an English windmill, the cap being winded by a hand-operated winch having spur and worm gears.

4. Winch - Wikipedia

   en.wikipedia.org/wiki/Winch

   Winches are the basis of such machines as tow trucks, steam shovels and elevators. More complex designs have gear assemblies and can be powered by electric, hydraulic, pneumatic or internal combustion drives. It might include a solenoid brake and/or a mechanical brake or ratchet and pawl which prevents it unwinding unless the pawl is retracted ...

5. Fly system - Wikipedia

   en.wikipedia.org/wiki/Fly_system

   Manual hoists, or hand winches, are typically composed of a drum, gear box, and crank (operating handle). A worm gear is commonly used to provide mechanical advantage as the crank is turned, which coils a single line around a smooth or helically grooved drum. The drum line is connected to the lift lines with a clew, triangular plate with holes ...

6. Slewing drive - Wikipedia

   en.wikipedia.org/wiki/Slewing_drive

   The slewing drive is a modernized take on the worm drive mechanism, which dates back many centuries and was widely used during the Renaissance Era. Pappus of Alexandria (3rd century AD), a Greek mathematician, is credited with an early version of the endless screw, which would later evolve into the worm drive. [1]

7. Crank (mechanism) - Wikipedia

   en.wikipedia.org/wiki/Crank_(mechanism)

   Hand crank for a winch on a sailboat - commonly referred to as a winch handle. A crank is an arm attached at a right angle to a rotating shaft by which circular motion is imparted to or received from the shaft. When combined with a connecting rod, it can be used to convert circular motion into reciprocating motion, or vice versa. The arm may be ...