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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 ...
In 1894, Ernst Sachs made his first design attempts for bicycle hubs, with the first patent on November 23 on bicycle ball bearings with sliding ball tread. On August 1, 1895, Ernst Sachs (technical director) and Karl Fichtel (commercial management) founded Schweinfurt Precision Ball Bearing factories (Fichtel & Sachs as oHG) with a founding ...
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]
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 ]
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]
Ball Bearing Patent US1219919A — Triple-race ball bearing which is self-contained, readily positioned, and high efficient in its operations (patented March 20, 1917). Ball Bearing Patent US1219920A — Double thrust ball bearing which is self-contained, and, therefore, capable of being handled and positioned as a unit (patented March 20, 1917).
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 ...
Pollard Ball and Roller Bearing Company with its headquarters at Ferrybridge, West Yorkshire was a manufacturer of ball and roller bearings founded by John King.Formerly it had been known as Ferrybridge Industries and was originally a small family motor repair firm, Whitehouse Motor Industries, Ford dealers.
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