experimental DeForest "Audion" tube
date: label: Date made
content: about 1907
name: label: maker
content: De Forest Radio Telephone & Telegraph Co.
label: maker
content: De Forest, Lee
notes: label: Description (Brief)
content: Early radio inventors used a variety of methods to detect radio waves. Those early detectors tended to be slow and cumbersome in operation and that limited transmission speed. In 1906, Lee de Forest built on the work of Thomas Edison and John Ambrose Fleming and invented an electron tube he called an “Audion.” His tube contained three internal elements: a filament, an electrode and a control grid. Today we call tubes of this type “triodes.” In 1907 De Forest received U.S. Patent #841,387 for his invention, one of the most important in the history of radio.
setName: label: See more items in
content: Work and Industry: Electricity
label: See more items in
content: Communications
label: Exhibition
content: Inventing in America
label: Exhibition Location
content: National Museum of American History
creditLine: label: Credit Line
content: from the American Museum of Electricity
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1979.0299.93
label: catalog number
content: 1979.0299.93
label: accession number
content: 1979.0299
objectType: label: Object Name
content: electron tube
label: Object Name
content: triode
physicalDescription: label: Measurements
content: overall: 4 1/2 in x 1 5/8 in; 11.43 cm x 4.1275 cm