Download PDF by Charles W., Jr. Carey, Ian C. Friedman: American Inventors, Entrepreneurs, and Business Visionaries

By Charles W., Jr. Carey, Ian C. Friedman

ISBN-10: 0816081468

ISBN-13: 9780816081462

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However, his adult life was marred by drawn-out lawsuits over patents. 8╇╇ Ash, Mary Kay In 1915 he was sued by De Forest, who claimed to have invented the regenerative circuit a year before Armstrong did. S. Supreme Court settled it in De Forest’s favor; the radio community never accepted the validity of this ruling and generally considers Armstrong to be the inventor of the regenerative circuit. In 1948 he sued RCA and several other large companies for violating his patent rights to FM. Six years later—frustrated by the time and money the lawsuits were consuming and in ill health—on January 31, 1954, he committed suicide by leaping from his apartment window.

In 1907 Lee De FoReSt invented the audion, a vacuum-tube receiver that amplified signals a little bit louder than the crystal could. However, not even De Forest knew why the audion worked. During his junior year at Columbia, Armstrong discovered that the audion’s anode plate oscillated while receiving a radio signal. He then devised a circuit that fed this oscillating signal back into the audion’s control grid, thereby amplifying the original signal so much that it could be heard across the room without earphones.

Senate, her Gardena plant was raided by agents of the Immigration and Naturalization Service (INS), who arrested 36 undocumented workers. Although the hiring of illegal aliens was not illegal at the time, a great deal of negative publicity was generated by the incident, mostly by labor unions complaining about her hiring practices. Bañuelos refused to withdraw her name from consideration, claiming that the raid had been an attempt to embarrass the president and the Mexican-American community. After the Senate confirmed her without dissent, Nixon ordered the INS to raid the newspaper that first published the story of Bañuelos’s hiring practices.

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American Inventors, Entrepreneurs, and Business Visionaries (Facts on File Library of American History) by Charles W., Jr. Carey, Ian C. Friedman


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