National Bureau Of Standards sintered tungsten lamp
date: label: date made
content: ca 1908
notes: label: Description (Brief)
content: Non-ductile (sintered) tungsten lamp used at the Bureau of Standards around 1908. Brass medium-screw base with glass insulator. Five single-arch tungsten filaments (in series) with 5 upper, 8 lower support hooks. Soldered connectors, Siemens seal, cotton insulator. Tipped straight-sided envelope with taper at neck. Mazda A type. “2-a0 47-52” inked on press. “B.S. 5495” etched on envelope. Lamp mentioned in Memo of Sphere Standards, dated 6 March 1929 by A. R. Snyder.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from the U. S. Department of Commerce, National Institute of Standards & Technology
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1992.0342.15
label: accession number
content: 1992.0342
label: catalog number
content: 1992.0342.15
objectType: label: Object Name
content: Light Bulb
label: Object Name
content: incandescent lamp
physicalDescription: label: Physical Description
content: tungsten (overall material)
label: Measurements
content: overall: 5 1/4 in x 2 3/8 in; 13.335 cm x 6.0325 cm