Engineers

John Ambrose Fleming

Citation Formats

General Reference

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

APA Style

Technology and Engineering Atlas. (n.d.). John Ambrose Fleming. Retrieved August 30, 2026, from https://dev-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://dev-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.

View the Source

Comments (0)

No comments yet. Be the first to share a thought.

Reader Challenges (0 open reader challenges)

No disputes yet. Spotted an error or a better source? Open the first one.

View At A Past Year

The atlas records no dated fact of its own for this entry, so there is no other year to choose.

Switch Atlas

The Inner World

The Civil World

The Natural World