Engineers

John Ambrose Fleming

Citation Formats

General Reference

Technology and Engineering Atlas. "John Ambrose Fleming." Accessed August 30, 2026. https://technology.interactiveatlas.org/engineers/john-ambrose-fleming.

APA Style

Technology and Engineering Atlas. (n.d.). John Ambrose Fleming. Retrieved August 30, 2026, from https://technology.interactiveatlas.org/engineers/john-ambrose-fleming

BibTeX

@misc{technologyandengineeringatlas-john-ambrose-fleming,
  author = {Technology and Engineering Atlas},
  title = {John Ambrose Fleming},
  year = {2026},
  url = {https://technology.interactiveatlas.org/engineers/john-ambrose-fleming},
  note = {Accessed August 30, 2026}
}

English electrical engineer and physicist who invented the thermionic valve, the diode later known as the Fleming valve, in 1904.

Facts

Birth Year

1849 1

Birth Date

1849-11-29 1

Death Year

1945 1

Death Date

1945-04-18 1

Nationality

English 1

Cross-Tradition Connections

Invented

Vacuum Tube

Source Vacuum Tube (Wikipedia)

Sources

1. John Ambrose Fleming (Wikipedia)

Wikimedia FoundationLead section

Quote, Lead section

Sir John Ambrose Fleming (29 November 1849 - 18 April 1945) was an English electrical engineer and physicist.

View the Source

Vacuum Tube (Wikipedia)

WikipediaInvented: Vacuum Tube, History section (inventor attribution)

Quote, Invented: Vacuum Tube, History section (inventor attribution)

The first, and simplest, vacuum tube, the diode or Fleming valve, was invented in 1904 by John Ambrose Fleming.

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