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A Brief History of Transformers (Not the Robot Kind)


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The theoretical foundation was laid in the early 1830s, with the independent discovery of electromagnetic induction by Michael Faraday and Joseph Henry. They showed that a changing magnetic field can induce a current of a higher voltage (known as “stepping up”) or a lower one (“stepping down”). But it took another half-century before Lucien Gaulard, John Dixon Gibbs, Charles Brush, and Sebastian Ziani de Ferranti could design the first useful transformer prototypes. Next, a trio of Hungarian engineers Ottó Bláthy, Miksa Déri, and Károly Zipernowsky improved the design by building a toroidal (doughnut-shaped) transformer, which they exhibited in 1885. ....

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How Wendell King Found His Frequency in Erie


How Wendell King Found His Frequency in Erie
African American radio engineer met and obliterated the color line
by Jonathan Burdick
Union College
It was June of 1917 and the United States was at war. The first American infantry troops had arrived in Europe that month and stateside manufacturers were working around the clock to keep up with wartime demand. In Schenectady, N.Y., the sprawling General Electric plant, which employed 20,000 workers, hired a few dozen students from nearby Union College for the summer. This included Wendell Wilford King, a brilliant 20-year-old North Troy local who had just finished his freshman year studying electrical engineering. Instead of having him work in the yard like most college hires, he was put on a drill press. ....

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