National Bureau Of Standards Carbon Lamp
date: label: date made
content: ca 1920
notes: label: Description (Brief)
content: Carbon lamp used at the Bureau of Standards around 1920. Brass medium-screw base with glass insulator. Double-arch carbon filament with 1" center support, carbon-paste connectors, dumet leads, fiber insulator. Tipped S-shaped envelope with taper at neck. "581 09+" inked in base. "B.S.3860" etched on envelope. "z164" inked on press, "O (with vertical slash)" etched on one side of envelope, "|" etched on opposite side. "BS-3860 0 TR 15-76-31 1931-32 #5" inked on envelope (later). Inked on bottom of box, "BS.3860 0 TR 15-76-31 Int. comparison 1931-32 Read in turn at BS, NPL, LCE, PTR + BS." Also, "[_____] U.S."
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: 1992.0342.12
label: catalog number
content: 1992.0342.12
label: accession number
content: 1992.0342
objectType: label: Object Name
content: Light Bulb
label: Object Name
content: incandescent lamp
physicalDescription: label: Physical Description
content: carbon (overall material)
label: Measurements
content: overall: 5 in x 2 3/8 in; 12.7 cm x 6.0325 cm