Triode Triode A triode is an electronic amplifying vacuum tube (or "thermionic valve" in British English) consisting of three electrodes inside an evacuated glass envelope: a heated filament or cathode, a grid, and a plate (anode). Developed from Lee De Forest's 1906 Audion, a partial vacuum tube that added a grid electrode to the thermionic diode (Fleming valve), the triode was the first practical electronic amplifier and the ancestor of other types of vacuum tubes such as the tetrode and pentode. Its invention founded the electronics age, making possible amplified radio technology and long-distance telephony. Triodes were widely used in consumer
Arthur Williams (electrical engineer) his work in connection with the American Museum of Safety the King of Spain made him a Knight of the Royal Order of Isabel the Catholic. Arthur Williams (electrical engineer) Arthur Williams (August 14, 1868 – April 14, 1937) was an American electrical engineer, executive at the New York Edison Company, Federal Food Administrator of the City of New York, and first president of The National Association of Corporation Schools in 1913. Williams was born in Norfolk, Virginia in 1868, the son of Rev. Christopher S. and Hannah Sanford (Rogers) Williams. He was educated in the public and private schools