Harry Ward Leonard (1861–1915), U.S. electrical engineer and inventor
In 1896, Leonard organized and became president of Ward Leonard Electric as an Edison company in Hoboken, New Jersey.
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Electron tube types of DC motor controls began to be developed in the 1920s but electronic controls didn’t seriously begin to displace the Ward Leonard system until thyristor controlled drives were developed in the late 1960s.
Ward Leonard Control, also known as the Ward Leonard Drive System, was a widely used DC motor speed control system introduced by Harry Ward Leonard in 1891.
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