National Bureau Of Standards Carbon Lamp
date: label: date made
content: ca 1920
name: label: maker
content: General Electric Company
label: maker
content: Franklin Electric Manufacturing Company
notes: label: Description (Brief)
content: General Electric / Franklin Electric carbon lamp used at the Bureau of Standards around 1920. Brass medium-screw base with glass insulator. Double-arch GEM filament with 1" center support, carbon-paste connectors, dumet leads, fiber insulator. Tipped S-shaped envelope with taper at neck. "B.S.824" etched on envelope. "O (with vertical slash)" etched on one side of envelope, "|" etched on opposite side. "#3" on piece of tape on envelope, "Photometric Standard Lamp #3" inked on envelope (later). Patent label in stem with black kite outline: "The manufacturer of this lamp is licensed under patents noted on other side." [other side hidden] Printed on all four sides of box, "Photometric Standard Lamp from Engineering Department National Lamp Works of General Electric Co. Nela Park Cleveland [National logo] [GE logo]".
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: 1992.0342.08
label: catalog number
content: 1992.0342.08
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