Two inventions – the electric motor and the electric power grid – transformed industry. Electric motors were invented in the first half of the nineteenth century. However, batteries – the only power source available at the time – were not powerful enough to allow electric motors to realize their full potential. This required invention of the electrical power grid at the end of the nineteenth century. By the early twentieth century, the combination of these two inventions transformed manufacturing. Along with other inventions of that era, this transformed the United States from an agricultural nation to the world’s leading producer of manufactured goods.

  1. Bar Magnet & Magnetic Motor
  2. Magnetic Alternator & Magnetic Motor
  3. Electromagnet & Magnetic Motor
  4. Electromagnetic Motor
  5. Electronic Alternator
  6. Tone Generator
  7. Solenoid Motor