When was the vacuum cleaner invented?

In 1901, a British civil engineer named Booth went to the Empire Music Hall in Leicester Square, London, to watch a demonstration performance of a car dust collector held in the United States. This kind of vacuum cleaner uses compressed air to blow dust into the container. Booth feels that this method is not clever because a lot of dust fails to be blown into the container. Later, he did the opposite and used the vacuuming method. Booth conducted a very simple experiment: covered a handkerchief on the armrest of a chair, and breathed into the handkerchief with his mouth. As a result, the handkerchief was coated with a layer of dust. dust. So he made a vacuum cleaner, using a powerful electric pump to suck air into a hose and filter the dust through a cloth bag. In August 1901, Booth obtained the patent and established a vacuum cleaner company, but did not sell vacuum cleaners. He installed a vacuum pump driven by a gasoline engine on a horse-drawn carriage and provided door-to-door service. He extended three or four long hoses from the window into the room to vacuum, and all company employees wore work clothes. This was the predecessor of the later vacuum cleaner. In 1902, Booth's service company was called to Westminster Abbey to clean the carpets used for the coronation of Edward VII. Since then, business has been booming. In 1906, Booth made a small household vacuum cleaner. Although it was called "small", the vacuum cleaner weighed 88 pounds (1 pound = 0.4536 kilograms) and was too bulky to be popularized. In 1907, Spangula, an inventor in Ohio, USA, made a lightweight vacuum cleaner. He was working as a manager in a store at the time. To relieve his son from the burden of cleaning carpets, he made a vacuum cleaner that used an electric fan to create a vacuum and suck the dust into the machine. , and then blown into the pocket. Since he was unable to produce and sell it himself, he transferred the patent to the fur manufacturer Hoover in 1908. At that time, Hoover began to manufacture a wheeled "O" type vacuum cleaner, which sold very well. This earliest household vacuum cleaner had a reasonable design, and it has not changed much in principle since its development. The earliest vacuum cleaners designed were upright.

In 1913, Werner G?ring of Stockholm, Sweden invented the horizontal can-shaped vacuum cleaner