Franklin Electric tantalum filament lamp
date: label: Date made
content: 1907
name: label: maker
content: Franklin Electric Manufacturing Company
notes: label: Description (Brief)
content: Franklin Electric tantalum filament lamp, 1907. Brass medium-screw base with skirt, porcelain dome-insulator. Drawn tantalum filament with 11 upper, 10 lower copper support hooks. Crimp connectors, offset leads, Siemens seal, cotton insulator. Tipped straight-sided envelope.
label: Description (Brief)
content: The element tantalum was used as a lamp filament during the first decade of the twentieth century. Although somewhat more energy efficient than carbon filaments common at that time, tantalum filaments did not work well with alternating current. They were phased out in the early 1910s when manufacturers introduced lamps made with tungsten filaments.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Ralph and Jackie Marino
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2006.0172.01
label: catalog number
content: 2006.0172.01
label: accession number
content: 2006.0172
objectType: label: Object Name
content: incandescent lamp
physicalDescription: label: Measurements
content: overall: 5 1/4 in x 2 1/2 in; 13.335 cm x 6.35 cm