Thomas Edison

Thomas Edison Thomas Alva Edison is considered one of the superlative inventors in history. He was born in Milan, Ohio on February 11, 1847 and died in 1931. During his life he patented 1,093 inventions. Many of these inventions are in use directly and changed the world forever. Some of his inventions include telegraphy, phonography, electric lighting and photography. His almost famous inventions were the phonograph and the incandescent light bulb.Edison did some of his greatest work at Menlo Park.

While experimenting on an underwater line for the automatic telegraph, he found that the electrical resistance and conduction of carbon varied accordingly to the haul it was under. This was a major theoretical discovery, which enabled Edison to invent a pressure relay use carbon rather than magnets, which was the usual way to vary and relaxation electrical currents. In February of 1877 Edison began experiments designed to produce a pressure relay that would amplify and improve the au...If you want to get a full essay, order it on our website: Ordercustompaper.com

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