How was the washing machine invented?

1858, a man named Hamilton? Smith's Americans made the world's first washing machine in Pittsburgh. The main part of the washing machine is a drum with a straight shaft with blades. In the same year, Smith obtained the patent right of this washing machine. However, this kind of washing machine is laborious to use and harmful to clothes, so it is not widely used, but it marks the beginning of washing clothes with machines.

1880, steam washing machines appeared in the United States, and steam power began to replace manpower. After the invention of the steam engine, some people used it to realize the mechanization of laundry. But in the true sense, the birth of washing machine was after the invention of electric motor. The world's first electric washing machine is an American Alva? Ding? Fisher designed and manufactured it in 190 1 After that, hydraulic washing machines and internal combustion engine washing machines also appeared one after another. By 19 1 1, the United States has successfully trial-produced the world's first electric washing machine. The appearance of electric washing machine marks the beginning of human housework automation.