Electric discharge tube
date: label: date made
content: ca 1900
notes: label: Description (Brief)
content: Brass base shell with plaster insulator, two copper contacts. Metal (tungsten?) ribbon-filament, with flat press, glass bead insulator, platinum (?) leads, and soldered (?) connectors. A white dot is on the center of the filament. Glass stem mount with two support loops. A metal rod electrode and a plate electrode are set on opposite sides of the envelope, at 45 degree angles below the plane of the filament. Each electrode is attached to a brass cap and loop connector. Tipped, G-shaped envelope with maker's logo: capital G with a balance-scale. Printed: "552".
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from International Business Machines, Inc., William J. Hammer Collection
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.320436.02
label: catalog number
content: 320436.02
label: accession number
content: 241402
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: 3electron tube
label: Object Name
content: discharge tube
physicalDescription: label: Measurements
content: overall: 11 3/4 in x 7 1/2 in x 5 1/2 in; 29.845 cm x 19.05 cm x 13.97 cm