Just sintered tungsten filament lamp
date: label: date made
content: ca 1908
name: label: maker
content: Just, Alexander
label: maker
content: Hanaman, Franz
notes: label: Description (Brief)
content: Just non-ductile (sintered) tungsten-filament lamp, ca. 1908. First generation tungsten filament lamp. Characteristics: Brass medium-screw base with collar, porcelain-dome insulator. Four single-arch tungsten filaments in series with 4 upper, 6 lower supports. Welded or paste connectors, Siemans seal. Glass stem is mounted on two shock-absorbing springs (one set in the press, the other attached to a glass rod that is set in the exhaust tip). Tipped, straight-sided envelope with taper at neck. Lamp developed by Dr. Alexander Just and Franz Hanaman in Vienna in 1902. Mazda A type. Printed on lamp: “Just Tungsten Lamp Pats. Pending”. Written on lamp: “20246a.1628”. Something else is written at base, near neutral lead-weld. [See Bright, Electric Lamp Industry, pp. 184-94.]
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
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content: Energy & Power
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content: Electric Lamps
creditLine: label: Credit Line
content: from General Electric Lighting Company, thru Terry K. McGowan
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1997.0388.55
label: accession number
content: 1997.0388
label: catalog number
content: 1997.0388.55
objectType: label: Object Name
content: incandescent lamp
physicalDescription: label: Measurements
content: overall: 6 in x 2 3/8 in; 15.24 cm x 6.0325 cm