National Bureau Of Standards Coiled Tungsten Lamp
date: label: date made
content: ca 1918
notes: label: Description (Brief)
content: Coiled tungsten lamp used at the Bureau of Standards around 1918. Brass mogul-screw base with collar, glass insulator. C-7BU tungsten filament with 5 two-piece (crimp connected) supports, a support attaches each lead to the stem. Crimp connectors, dumet leads, gas-fill, cork insulator, Mica heat shield attached to leads above press (leads molded to hold shield). Tipped PS-shape envelope. "5 AO 71-52 5886" inked on press, "B.S. 4449" 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: 1992.0342.22
label: accession number
content: 1992.0342
label: catalog number
content: 1992.0342.22
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: 10 1/2 in x 5 1/4 in; 26.67 cm x 13.335 cm