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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 ...
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]
Thus, the worldwide success story of the ball bearing begins in Schweinfurt. Later, 1883 is officially declared the year in which the company was founded. 1890 - On July 17, Fischer received the patent for his ball grinding machine from the Kaiserliches Patentamt .
Silicon nitride bearing balls, in diameters ranging from 1 to 20mm. Bearing balls are special highly spherical and smooth balls, most commonly used in ball bearings, but also used as components in things like freewheel mechanisms. The balls themselves are commonly referred to as ball bearings. [1] This is an example of a synecdoche.
A ball bearing. A bearing is a machine element that constrains relative motion to only the desired motion and reduces friction between moving parts.The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts.
1794 - The first patent for the ball race was given to Phillip Vaughn of Carmarthen, Wales. This is the first design seen with a spherical object moving through a groove. 1869 -Jules Suriray receives the first patent for a radial ball bearing, his design was used by James Moore to win the first 80 mile bicycle race from Paris to Rouen. [6]
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]
the ball bearing industry was a large sector of engineering technology and an essential input into the motor and aircraft industries; when compared with other developed countries the British industry was fragmented; there was a possibly of a merger of Sweden's Skefko and Ransome & Marles. SKF dominates the market in European countries.
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