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The word yo-yo probably comes from the Ilocano term yóyo, or a cognate word from the Philippines. [1] [2]Boy playing with a terracotta yo-yo, Attic kylix, c. 440 BC, Antikensammlung Berlin (F 2549) A 1791 illustration of a woman playing with an early version of the yo-yo, which was then called a "bandalore" Lady with a yo-yo, Northern India (Rajasthan, Bundi or Kota), c. 1770 Opaque ...
Duncan Toys Company is an American toy manufacturer based in Middlefield, Ohio. [1] The company was founded in 1929 by Donald F. Duncan Sr. and purchased the Flores Yo-Yo Company from Pedro Flores, who brought the yo-yo to the United States from the Philippines.
His was the first modern ball-bearing design, with the ball running along a groove in the axle assembly. [1] Jules Suriray, a Parisian bicycle mechanic, designed the first radial style ball bearing in 1869, [2] which was then fitted to the winning bicycle ridden by James Moore in the world's first bicycle road race, Paris-Rouen, in November ...
Fischer designed the ball grinding mill, a machine that allows steel balls to be ground to an absolutely round state in large volumes for the first time. His innovation was to tilt slightly the grinding wheel by 1.9°, forcing the balls to rotate on both their axis while they are ground. [ 1 ]
Philip Vaughan was a Welsh inventor and ironmaster who patented the first design for a ball bearing in 1794. [1] [2] Vaughan's patent [3] described how iron balls could be placed between the wheel and the axle of a carriage. The balls let the carriage wheels rotate freely by reducing friction. [4]
1877 patent 3531 granted 19 September 1877 as "bearings for velocipedes, carriages and other purposes". Including the first ball-race-pedal and wheel-bearings based on their development of the "AEolus ball bearing". These were to become key products for the company accordingly bearing the trade-mark Aeolus name. [1]
Wingqvist bearing Sven Wingquist - oil on canvas by Oskar Spitzmüller, Vienna. Sven Gustaf Wingqvist (10 December 1876 – 17 April 1953) was a Swedish engineer, inventor, and industrialist, and one of the founders of Svenska Kullagerfabriken (SKF), one of the world's leading ball bearing and roller bearing makers.
The Chinese yo-yo, often considered a type of diabolo, has been described as "a short round wooden stick with two round disks, 1.5 cm thick with a space between them, attached on either end of the stick...It will rotate on a string, each end tied to a thin stick," [21] and as "two hollow discs of light wood, with openings in the sides, united ...
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