1873‐1961 American inventor. Also known as De Forest. Best known for inventing the triode vacuum tube. Born in Council Bluffs, Iowa. Studied at Yale University, where he earned his doctorate by studying the reflection of Hertzian waves at the ends of parallel wires. Worked for Western Electric, and in 1902 set up his own company, the De Forest Wireless Telegraph Company, but was unsuccessful. In 1906, De Forest added a third grid electrode to the diode vacuum tube invented by JA Fleming, inventing the triode vacuum tube. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
1873‐1961 アメリカの発明家。ド・フォレストともいう。三極真空管の発明により有名である。アイオワ州カウンシル・ブラッフスに生まれた。イェール大学に学び,平行線端におけるヘルツ波の反射を研究して博士号をとった。ウェスタン・エレクトリック社で働き,1902年には独立してデ・フォレスト無線電信社を設立したが成功しなかった。06年,J.A.フレミングが発明した二極真空管にデ・フォレストは第三電極のグリッドを加えて,三極真空管を発明。 出典 株式会社平凡社世界大百科事典 第2版について 情報 |
A constellation that appears only with its upper ...
Also known as Graves' disease. Hyperthyroidism...
A painter who specializes in Buddhist paintings. A...
1767‐1826 King of Portugal. Reigned 1816-26. Son o...
According to a 1996 survey by the Food and Agricul...
...Agriculture is centered on rice cultivation, w...
An evergreen perennial plant of the lily family (...
An ancient Greek grammarian from around 170-90 BC....
...About 500 species are distributed from the Wes...
...The positioning accuracy required at this time...
A French marine biologist known as a specialist in...
A pass located in the southeast of Nagano Prefectu...
A method to diagnose the nutritional condition of ...
...The hilly Boso Peninsula and Miura Peninsula a...
If the firstborn child is a girl, she will take p...