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2. Mechanical advantage device - Wikipedia

   en.wikipedia.org/wiki/Mechanical_advantage_device

   Examples of rope and pulley systems illustrating mechanical advantage. Consider lifting a weight with rope and pulleys. A rope looped through a pulley attached to a fixed spot, e.g. a barn roof rafter, and attached to the weight is called a single pulley. It has a mechanical advantage (MA) = 1 (assuming frictionless bearings in the pulley ...

3. Pulley - Wikipedia

   en.wikipedia.org/wiki/Pulley

   Pulley in oil derrick A hoist using the compound pulley system yielding an advantage of 4. The single fixed pulley is installed on the hoist. The two movable pulleys (joined) are attached to the hook. One end of the rope is attached to the crane frame, another to the winch.

4. Winch - Wikipedia

   en.wikipedia.org/wiki/Winch

   The winch may be mounted to a vehicle, set into the ground by stakes, or tied to a tree. The cable may also be run through pulleys mounted offshore so that it pulls the person away from where the winch is located, and multiple pulleys may be used to multiply the force applied by a small but high revving motor instead of using a transmission.

5. Hoist (device) - Wikipedia

   en.wikipedia.org/wiki/Hoist_(device)

   Hoist atop an elevator. A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium.

6. Rigging (material handling) - Wikipedia

   en.wikipedia.org/wiki/Rigging_(material_handling)

   Come-along – Lever operated, portable ratchet winch; Crane (machine) – Type of machine; Crawler (rigging) Hook – Tool used to grab onto, connect, or attach to something; Hoist (device) – Device used for lifting or lowering a load; Jack (device) – Mechanical lifting device; Knot – Method of fastening or securing linear material

7. Differential pulley - Wikipedia

   en.wikipedia.org/wiki/Differential_pulley

   A dumb pulley can lift very large masses a short distance. It consists of two fixed pulleys of unequal radii that are attached to each other and rotate together, a single pulley bearing the load, and an endless rope looped around the pulleys. To avoid slippage, the rope is usually replaced by a chain, and the connected pulleys by sprockets.

8. Crank (mechanism) - Wikipedia

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

   [21] [22] The handle near the outer edge of the rotary part makes the crank, [21] [23] [24] a human arm powering the rotation would be the connecting rod. [21] According to F. Lisheng and T. Qingjun, the hand-crank of the rotary quern was different from a crank, which was the combination of a hand-crank and a push-and-pull connecting rod by a ...

9. Fly system - Wikipedia

   en.wikipedia.org/wiki/Fly_system

   Fly loft of the Theater Bielefeld in Germany. A fly system, or theatrical rigging system, is a system of ropes, pulleys, counterweights and related devices within a theater that enables a stage crew to fly (hoist) quickly, quietly and safely components such as curtains, lights, scenery, stage effects and, sometimes, people.