experimental Fleming valve
date: label: date made
content: ca 1905
name: label: maker
content: Fleming, John Ambrose
notes: label: Description (Brief)
content: Experimental Fleming valve in wooden mount. This valve was preserved as a "relic" by Fleming, who sent it to a magazine editor in 1926. A glass tube containing a filament and cylindrical electrode mounted in a wooden stand. Two binding posts are set on top, a third is on a side arm, and a spring maintains tension on the tube. The mount is an experimental piece that can be used to test different tubes of this design.
label: Location
content: Currently not on view
place: label: place made
content: United Kingdom
setName: label: See more items in
content: Work and Industry: Electricity
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.318208
label: accession number
content: 232756
label: catalog number
content: 318208
label: accession number
content: 232756
objectType: label: Object Name
content: vacuum tube
label: Object Name
content: diode
physicalDescription: label: Measurements
content: overall: 4 3/4 in x 1 in; 12.065 cm x 2.54 cm