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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 ...
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 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. The earliest evidence of pulleys dates back to Ancient Egypt in the Twelfth Dynasty (1991–1802 BC) [1] and Mesopotamia in the early 2nd millennium BC. [2]
Chesty Puller, a United States Marine Corps officer during World War II and the Korean War, and the most decorated Marine in the history of the Corps Lewis Puller , son of Chesty Puller, who was maimed during the Vietnam War and took his own life due to complications from his injuries two and a half decades later
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.
Another capability is to install a single cable or a bundle of small ducts into an occupied duct. The most expensive activity in installing a network is the need for civil works. Thus, re-using ducts occupied with one cable, leaving some space, is a tempting and often possible and cost-effective alternative.
Lewis Burwell "Chesty" Puller (June 26, 1898 – October 11, 1971) was a United States Marine Corps officer. Beginning his career fighting guerillas in Haiti and Nicaragua as part of the Banana Wars, he later served with distinction in World War II and the Korean War as a senior officer.
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