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Lee De Forest, ( Iowa, August 26 of 1873 - Hollywood , June 30 of 1961) was an American inventor with 300 patents.
Born in 1873 in Council Bluffs, Iowa, but grew up in Talladega, Alabama , where they had sent to his father, minister, to reorganize a black school. It was a lonely place for young Lee, deprived of the usual youth relationships, had more time to read. His father was directly involved in the child's education, hoping to steer it to a religious vocation.
No But Lee would prefer to have science and showed great aptitude for it, building batteries and engines were of professional quality. In the Sheffield Scientific School of Yale , was encouraging the talents of Lee and stayed there until receiving his doctorate in 1899. Throughout his life
created a lucrative idea after another, plus the lack of business acumen kept him from taking advantage of the fruits of his genius. Excessive growth of your company eventually lead to bankruptcy, but De Forest quickly recovered.
married the young inventor in 1908, most had a very busy honeymoon. With his wife went to Paris , and there installed a telephone transmitter in the top of the Eiffel Tower . On his return to the United States was besieged by requests for his inventions that made people of all social classes. built antennas on the roofs of skyscrapers and installed his electronic sound amplification equipment (microphones ) in theaters and the Metropolitan Opera House.
Idea after idea came from the prolific brain of De Forest. Among his many inventions, patents received a scalpel , the circuit high frequency oscillator, the radio , systems transmission and reception of radio , communication systems for trains, a speaker the photocell , the movie camera soundproof and apparatus television and color television . In 1923 demonstrated in the Rivoli Theatre, New York, the process Phonofilm for sound films.


De Forest Triode, 1906.
But it was in 1906 when De Forest invented the triode . The objective of De Forest was to discover a method to amplify the waves and at the same time, control the sound volume. He built a thin strip of platinum wire (which gave the name "grid"), folded and placed in zigzag between the filament and plate. After the whole apparatus enclosed in a glass bulb.
hardly be considered that the twist a thin piece of wire and insert it in a light bulb is an incident that touched the world, but that's literally what he did to Lee De Forest invented the triode, which is now regarded as one twenty most important inventions in the history of mankind.

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Samuel Finley Breese Morse ( April 27 1791 of , Charlestown, Massachusetts - died April 2 of 1872, New York ), inventor of the telegraph . He began his studies at Phillips Academy of adobe, from where he went to Yale College.
In his student years he discovered in him a certain vocation for painting and decided to pursue it, but also attracted by the recent discoveries and experiments for electricity. For a while, worked in Boston for a publisher and then traveled to England to study painting in the city of London , and became a successful portrait painter and sculptor, his most famous painting is the portrait of La Fayette that he painted in 1825, became a painter of scenes históricas.Cuando returned home he noticed that the paintings of historical scenes did not like his countrymen, so which marked a turning towards specialization of the portrait. For 1825 in New York, was one of the country's leading portrait painters and was one of the most distinguished intellectual groups. In 1826 he was a founder and first president of the National Academy of Design.