The British Hurber Booth (Herbert Booth) used his mouth to blow off a large amount of dust on the back of a chair during a meal. As a result, he choked and found it difficult to breathe, which led to the idea of ????inventing the vacuum cleaner. But the vacuum cleaner at the time was a behemoth. It has an air pump, a tin can containing dust and a filtering device. These devices are all installed on a cart and operated by two people together. Although Booth's vacuum cleaner is very powerful, it is bulky and difficult to operate. In 1908, American James Spangler used a small motor to drive an air extractor based on the principle of Booth's vacuum cleaner, and placed a rotating brush at the suction port so that the dust brushed by the brush could be sucked into the interior of the vacuum cleaner. He sold the patent to leather manufacturer Hoover. Once Hoover's small vacuum cleaner came out, it was enthusiastically welcomed by the public and became a must-have cleaning tool for today's families.