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Concept
John Ambrose Fleming
Summary
Sir John Ambrose Fleming FRS (29 November 1849 – 18 April 1945) was an English electrical engineer and physicist who invented the first thermionic valve or vacuum tube, designed the radio transmitter with which the first transatlantic radio transmission was made, and also established the right-hand rule used in physics.
He was the eldest of seven children of James Fleming DD (died 1879), a Congregational minister, and his wife Mary Ann, at Lancaster, Lancashire, and baptised on 11 February 1850. A devout Christian, he once preached at St Martin-in-the-Fields in London on evidence for the resurrection.
In 1932, he and Douglas Dewar and Bernard Acworth helped establish the Evolution Protest Movement. Fleming bequeathed much of his estate to Christian charities, especially those for the poor. He was a noted photographer, painted watercolours, and enjoyed climbing the Alps.
Ambrose Fleming was born in Lancaster and educated at Lancaster Royal Grammar School, University College School, London, and then University College London, where he obtained a BSc in 1870. He entered St John's College, Cambridge in 1877, gaining a DSc from the University of London in 1879 and a BA from Cambridge in 1881, before becoming a fellow of St John's in 1883. He went on to lecture at several universities including the University of Cambridge, University College Nottingham, and University College London, where he was the first professor of electrical engineering. He was also a consultant to the Marconi Wireless Telegraph Company, Swan Company, Ferranti, Edison Telephone, and later the Edison Electric Light Company. In 1892, Fleming presented an important paper on electrical transformer theory to the Institution of Electrical Engineers in London.
Fleming started school at about the age of ten, attending a private school where he particularly enjoyed geometry. Prior to that his mother tutored him and he had learned, virtually by heart, a book called the Child's Guide to Knowledge, a popular book of the day – even as an adult he would quote from it.
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