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2. Underdrive pulleys - Wikipedia

   en.wikipedia.org/wiki/Underdrive_pulleys

   Additional and significant performance improvements can be seen by reducing the weight of the pulley versus the original pulley. Gains can range from 3 to 6 HP per pound of weight reduced. Poorly engineered underdrive pulleys can cause unwanted side effects; this is due to not spinning the alternator , power steering, and/or air conditioning ...

3. Belt (mechanical) - Wikipedia

   en.wikipedia.org/wiki/Belt_(mechanical)

   The mechanical belt drive, using a pulley machine, was first mentioned in the text of the Dictionary of Local Expressions by the Han Dynasty philosopher, poet, and politician Yang Xiong (53–18 BC) in 15 BC, used for a quilling machine that wound silk fibres onto bobbins for weavers' shuttles. [1]

4. Differential pulley - Wikipedia

   en.wikipedia.org/wiki/Differential_pulley

   The differential pulley was invented in 1854 by Thomas Aldridge Weston from King's Norton, England. [2] The pulleys were manufactured in collaboration with Richard and George Tangye. According to Richard Tangye's autobiography, the Weston differential pulley evolved from the Chinese windlass, with an endless chain replacing the finite length of ...

5. Pulley - Wikipedia

   en.wikipedia.org/wiki/Pulley

   A sheave or pulley wheel is a pulley using an axle supported by a frame or shell (block) to guide a cable or exert force. A pulley may have a groove or grooves between flanges around its circumference to locate the cable or belt. The drive element of a pulley system can be a rope, cable, belt, or chain.

6. B-Bender - Wikipedia

   en.wikipedia.org/wiki/B-Bender

   A B-Bender is a guitar accessory that enables a player to fluidly alter the pitch of a guitar's B-string. This works by mechanically bending the B-string through the use of a series of levers and/or pulleys attached to an external lever that is controlled by the player.

7. Crane (machine) - Wikipedia

   en.wikipedia.org/wiki/Crane_(machine)

   Greco-Roman Pentaspastos ("Five-pulley-crane"), a medium-sized variant (c. 450 kg load) Reconstruction of a 10.4 m high Roman Polyspastos powered by a treadwheel at Bonn, Germany. The heyday of the crane in ancient times came during the Roman Empire, when construction activity soared and buildings reached enormous dimensions. The Romans adopted ...