Who invented the washing machine

American hamilton smith made the world's first washing machine in Pittsburgh. The main part of the washing machine is a bucket with a straight shaft and paddle blades on it. Shake the crank connected to the shaft and the shaft will turn. In the same year, Smith applied for a patent for this washing machine. However, this kind of washing machine is not widely used because it is laborious to use and damages clothes, but it marks the beginning of washing with machines. The following year, a washing machine with a pestle as a stirrer appeared in Germany. When the pestle moves up and down, the wooden nail with spring constantly acts on the clothes. Extended information: 19 10, American Fisher successfully trial-produced the world's first electric washing machine in Chicago. The appearance of electric washing machine marks the beginning of human housework automation. 1922, Mattel Company of the United States reformed the washing structure of the washing machine, changing the drag type into the stirring type, so that the structure of the washing machine was fixed, and this was the birth of the first stirring washing machine. In this washing machine, a vertical shaft is installed in the center of the drum, and a stirring wing is installed at the lower end of the vertical shaft. The motor drives the vertical shaft to swing periodically, so that the clothes and water flow continuously roll and rub, thus cleaning the dirt. The invention has a scientific and reasonable structure and is widely welcomed by people. 1932, Bendex Airlines announced that they had successfully developed the first front drum washing machine, in which washing, rinsing and dehydration were completed in the same drum. This means that the type of electric washing machine has jumped to a new level and taken a big step towards automation. 1937 the first automatic washing machine came out. This is a front-mounted automatic washing machine. A cylinder driven by a horizontal shaft can hold 4000 grams of clothes. Clothes keep rolling up and down in a tank full of water to purify and remove scale. In the 1940s, a modern "top-loading" automatic washing machine appeared.