Electric discharge tube
date: label: date made
content: ca 1900
notes: label: Description (Brief)
content: Brass base shell with plaster insulator, two copper contacts. Single-arch (carbon?) filament, braided and coated, with flat press, glass bead insulator, platinum (?) leads, and soldered (?) connectors. Glass stem mount with two support loops. Two metal rod electrodes are set in parallel on opposite sides of the envelope, perpendicular to 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: "551".
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.320436.01
label: catalog number
content: 320436.01
label: accession number
content: 241402
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: discharge tube
physicalDescription: label: Measurements
content: overall: 11 in x 10 in x 5 1/2 in; 27.94 cm x 25.4 cm x 13.97 cm