Welsbach osmium filament lamp
date: label: date made
content: ca 1905
notes: label: Description (Brief)
content: Welsbach osmium filament lamp, ca. 1905. First successful metal filament lamp. Characteristics: Brass(?) medium-screw base with porcelain-dome insulator. Two single-arch osmium filaments in series with platinum upper leads and support. Two piece leads. Two filament support hooks (one for each filament) attached to the inside wall of the envelope. The hooks (which have broken free and are loose in the lamp) attach to the ends of the two glass stems. Crimp and paste connectors. Tipped, straight-sided envelope. Lamp sold in Europe only due to fragility and scarcity of osmium. Developed by Carl Auer van Welsbach in 1898. [See Bright, Electric Lamp Industry, 174-76.]
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
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: 1997.0388.53
label: accession number
content: 1997.0388
label: catalog number
content: 1997.0388.53
objectType: label: Object Name
content: Light Bulb
label: Object Name
content: incandescent lamp
physicalDescription: label: Measurements
content: overall: 4 1/2 in x 2 in; 11.43 cm x 5.08 cm