Westinghouse Metallized (GEM) lamp
date: label: date made
content: ca 1905
name: label: maker
content: Westinghouse Electric & Manufacturing Co.
notes: label: Description
content: Westinghouse metallized carbon-filament incandescent lamp, circa 1905. Brass medium-screw base with glass insulator. Two single-arch metallized carbon filaments with a center support/connector, carbon paste connectors, two-piece leads, cotton insulator. Tipped straight-sided envelope.
label: Description
content: First generation GEM (General Electric Metallized) lamp. GE's Willis Whitney used his new electric resistance furnace to bake regular carbon filaments at high temperatures in a hydrocarbon atmosphere. The resulting filament took on properties more akin to metal filaments than carbon, and gave 20 percent better energy efficiency. GE introduced the product in 1904 and Westinghouse licensed and produced their own version of these lamps.
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 Museum of Science and Industry (Chicago)
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.327846
label: catalog number
content: 327846
label: accession number
content: 271855
objectType: label: Object Name
content: Light Bulb
label: Object Name
content: incandescent lamp
label: Other Terms
content: Light Bulb; Edison; Double Horseshoe; Carbon
physicalDescription: label: Measurements
content: light bulb: 5 in x 2 5/16 in; 12.7 cm x 5.842 cm