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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 ...
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 ...
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 ...
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.
where is the angle (in radians) between the two flat sides of the pulley that the v-belt presses against. [5] A flat belt has an effective angle of α = π {\displaystyle \alpha =\pi } . The material of a V-belt or multi-V serpentine belt tends to wedge into the mating groove in a pulley as the load increases, improving torque transmission.
A come-along. A come-along, also known as a power puller, is a hand-operated winch with a ratchet used to pull objects. The drum is wrapped with wire rope.A similar tool that uses a nylon strap is used to straighten trees, as it straightens gradually over time, therefore not splitting the trunk.
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Stephanie Hsu as Ruby Yao, [3] a 33-year-old single Seattle-based party planner who is trying to solve why her sex partners are dying in the order she slept with them; Zosia Mamet as AJ, Ruby's best friend and roommate
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