General Electric searchlight lamp
date: label: date made
content: ca 1955
name: label: Maker
content: General Electric
notes: label: Description (Brief)
content: A GE incandescent searchlight lamp, circa 1955. Characteristics: Mogul bi-pin base with "Housekeepers seal". Steel pins. C-6 tungsten filament with center support. Each filament end is inserted into another tungsten coil, and those coils are in turn inserted into larger tungsten coils. These large coils are held in place by metal plates welded to the mounting frame. Ceramic cross-brace connects mount-frame and holds center support. Tungsten powder is loose in lamp to clean the inner lamp wall of tungsten boiled-off the filament. Bottom-tipped, T-shape envelope. The patent for the tungsten powder cleaning technique is US1809661, "Electric Lamp," issued to GE's Daniel K. Wright on 9 June 1931.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from General Electric Lighting Company, thru Terry K. McGowan
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1997.0388.22
label: accession number
content: 1997.0388
label: catalog number
content: 1997.0388.22
objectType: label: Object Name
content: Light Bulb
label: Object Name
content: incandescent lamp
physicalDescription: label: Measurements
content: overall: 9 1/2 in x 3 3/4 in; 24.13 cm x 9.525 cm