The birth of table tennis is closely related to the rapid development of tennis, which is actually a variant of tennis. After centuries of evolution and innovation, tennis has been loved by more and more people, and many businessmen have begun to pay attention to this popular sport. 1885 or so, some shrewd sporting goods manufacturers in Europe and America, in order to gain an advantage in the fierce commodity competition, moved tennis back from the outdoor to the indoor in view of the popularity of tennis in the upper class at that time, and boldly "invited" tennis from the ground to the dining table. Therefore, table tennis is also called "table tennis" in Britain and America. At that time, the racket used to play table tennis was similar to a small tennis racket, and the ball used was also a hard and light solid ball. 1890, an English engineer named Gibb put forward a novel idea of making hollow balls with celluloid. After continuous exploration and repeated development, five years later, this hollow ball miraculously appeared in people's lives. With the change of the ball quality, the racket has also changed a lot, from the initial small tennis racket to the wooden racket. These major changes directly led to the name table tennis. When the wooden racket collides with the celluloid ball, it makes a crisp sound-"ping", which is named table tennis according to this feature. In actual sports, the long handle of the racket brings great inconvenience to the players, so people change the long racket into a short one. Of course, table tennis was only a court sport in the early days, and it was widely circulated among nobles as an elegant entertainment in some European and American countries. Later, with the gradual improvement of this sport and the sharp increase of participants, this elegant sport rushed out of the hall, flowed into the people, and spread continuously, gradually becoming a favorite sport and Olympic event for people all over the world.
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The invention of lawn mower
/kloc-before the 0 th and 9 th centuries, people held sickles to cut grass. This is a laborious job and requires a lot of skills to shorten the grass.
Thomas Plucknett, an English engineer, was the first person to put forward the idea of making lawn mowers. He obtained the invention patent of the first lawn mower at 1805. This is a heavy machine with a round blade, and it doesn't work well.
Other inventors saw Plucknett's machine and thought they could do better. The most successful is Irving Bardeen. He is an engineer in a textile factory. The idea of the mechanical structure of the lawn mower was obtained from a machine in the factory. The lawn mower he made in 1830 is very similar to those machines used today.
Lawn mowers are produced by several companies, including a company called "Lan Soames of Ipswich". 1899, Lan Soames began to manufacture a motorized lawn mower powered by a small gasoline engine.
Badin's machine was the first practical lawn mower. It is very similar to the walking roller mower still in use today. When the handrail is pushed, the cutter moves forward and the blade rotates. The trimmed things fell into the wooden box.
In order to mow grass effectively, the sickle must be wet. On the contrary, if the grass is dry, it is best to use a lawn mower. In the beginning, people often owned a lawn mower and a sickle at the same time. As for which to choose when to use it, it depends on the weather.