The development history of washing machines

In 1858, an American named Hamilton Smith made the world's first washing machine in Pittsburgh. The main part of the washing machine was a drum with a straight shaft with paddle-like leaves inside. It is rotated by shaking the crank attached to it. That same year Smith patented the washing machine. However, this washing machine was not widely used because it was laborious to use and damaged clothes, but it marked the beginning of washing by machine.
In 1874, the "Hand Washing Era" was challenged unprecedentedly. American Bill Blacks invented the wooden hand washing machine. Black's washing machine has a very simple structure. It is equipped with 6 blades in a wooden cylinder, and is driven by a handle and gear to make the clothes turn over in the cylinder, so as to achieve the purpose of "cleaning clothes". The advent of this device inspired those who have been thinking hard about improving the efficiency of their lives, and the improvement process of washing machines began to be greatly accelerated.
In 1880, steam washing machines appeared in the United States, and steam power began to replace human power. After hundreds of years of development and improvement, modern steam washing machines have unparalleled improvements compared to the early days, but the principle is the same.
In 1910, Fisher of the United States successfully trial-produced the world's first electric washing machine in Chicago. The advent of the electric washing machine marked the beginning of the automation of human housework.
In 1922, the American Mataig Company transformed the washing structure of the washing machine, changing the drag type to the stirring type, so that the structure of the washing machine was fixed, which was the birth of the first stirring washing machine.
The first automatic washing machine came out in 1937. This is a "front-loading" automatic washer. The cylinder, driven by a horizontal shaft, can hold 4000 grams of clothing. Clothes are tumbled up and down in a tank filled with water to decontaminate and descale them. In the 1940s, modern "top-load" automatic washing machines appeared.

After that, with the further development of technology, more and more washing machines have been manufactured and become common household appliances in most households.