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Fleming was born in Lancaster and educated at University College School, London and UCL. Lecturer at a number of universities including Cambridge, Nottingham and UCL. Consultant to the Marconi Wireless Telegraph Company, Swan, Ferranti, Edison Telephone and later the Edison Electric Light Company.
In 1892 Fleming presented an important paper on transformer theory to the Institution of Electrical Engineers in London.
In November 1904 he invented and patented the two-electrode radio rectifier, which he called the oscillation valve. It was also called a thermionic valve, vacuum diode, kenotron, thermionic tube, or Fleming valve. This invention is often considered to have been the beginning of electronics.
In 1906Events January 8 Landslide in Haverstraw, New York kills 20 January 31 Earthquake in Ecuador (8. 6 in Richter scale) February 11 Pope Pius X publishes the encyclical Vehementer nos''. February 15 Representatives of the Labour Representation Committee in t Lee De ForestLee De Forest ( August 26, 1873 June 30, 1961), was an American inventor with over 300 patents to his name. De Forest invented the audion, a vacuum tube that takes weak electrical signals and amplifies them. De Forest is one of the fathers of the "electro of the USAThe United States of America also referred to as the United States U. America ¹ or the States is a federal republic in central North America, stretching from the Atlantic in the east to the Pacific Ocean in the west. It shares land borders with Canada in added a control grid to the valve to create a vacuum tubeIn electronics, a vacuum tube (American English) or thermionic) valve (British English) is a device generally used to amplify a signal. Once used in most electronic devices, vacuum tubes are now used only in specialized applications. For most purposes, th RF detector called the Audion, leading Fleming to accuse him of plagiarism. De Forest's device was later refined into an amplifier.
Fleming contributed in the fields of photometryIn astronomy, photometry is the measurement of the flux or intensity of an astronomical object's electromagnetic radiation. In physics, optics, and illuminating engineering, photometry is in general the measurement of quantities associated with light., electronicsElectronics is the study and use of electrical devices that operate by controlling the flow of electrons or other electrically charged particles in devices such as thermionic valves and semiconductors. The pure study of such devices is considered as a bra, wireless telegraphy and electrical measurements. He was knighted in 1929Centuries: 19th century 20th century 21st century Decades: 1870s 1880s 1890s 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s Years: 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 See also 1929 in aviation 1929 in film 1929 in literature 1929 in mu and died at Sidmouth in Devon.