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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 ...
The yo-yo is an example of a skill toy. A skill toy is an object or theatrical prop used for dexterity play or an object manipulation performance. A skill toy can be any static or inanimate object with which a person dances, manipulates, spins, tosses, or simply plays.
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. Sven Wingqvist invented the multi-row self-aligning ball bearing in 1907.
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 ]
Although bearings had been developed since ancient times, the first modern recorded patent on ball bearings was awarded to Philip Vaughan, a Welsh inventor and ironmaster who created the first design for a ball bearing in Carmarthen in 1794. His was the first modern ball-bearing design, with the ball running along a groove in the axle assembly. [1]
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 ...
The Perfect Scrambled Egg Method. I don't stray from my tried-and-true ratio, but have introduced two big changes: First, the splash of cream is replaced by a small splash of good olive oil.
The Yo-Yo Ball and the questionable Yo-Yo "Water" Ball are two different products and should not be confused. The Yo-Yo Ball is a spring loaded yo-yo with a plastic cover that automatically retracts when it's thrown. These are still available in most "big box" stores. The "Water" ball is an elastic "glorified" water balloon on an elastic tether.
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