1.Previous
3.Next

generators are called friction machines because of the friction in the generation process. A primitive form of frictional machine was invented around 1663 by Otto von Guericke, using a sulphur globe that could be rotated and rubbed by hand. It may not actually have been rotated during use and was not intended to produce electricity (rather "cosmic virtues"), but inspired many later machines that used rotating globes. Isaac Newton constructed

1.Previous
3.Next