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A flagpole, flagmast, flagstaff, or staff is a pole designed to support a flag. If it is taller than can be easily reached to raise the flag, a cord is used, looping around a pulley at the top of the pole with the ends tied at the bottom. The flag is fixed to one lower end of the cord, and is then raised by pulling on the other end.
According to one account, Kelly climbed his first pole at the age of seven, and at nine he performed a "human fly" trick, climbing up the side of a building. [1]He is credited with popularizing the pole-sitting fad after sitting atop a flagpole in 1924, either in response to a dare from a friend [7] or as a publicity stunt to draw customers to a Philadelphia department store. [8]
The US naval jack (2002–2019) being raised on a jackstaff in 2002. A jack staff (also spelled as jackstaff) is a small vertical spar (pole) on the bow of a ship or smaller vessel on which a particular type of flag, known as a jack, is flown. [1]
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 ...
The Independence Flagpole was the location where the Philippine flag was hoisted on July 4, 1946, when full independence was achieved from the United States. The flagpole was designed to be at 45.72 m (150.0 ft) high but was damaged by Typhoon Angela (Rosing) in 1995 reducing the flagpole's height to just 32 m (105 ft).
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]
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