Carbon filament lamp
date: label: date made
content: ca 1892
name: label: associated person
content: Edison, Thomas Alva
notes: label: Description (Brief)
content: Commercial carbon filament lamp, possibly of European make. Brass bayonet base with collar, fiber insulator, nubs instead of pins, brass contact ring, two dimples on opposite sides. Single-arch carbon filament with crimp & paste connectors, 2-piece platinum leads, flat Mather-style press. Tipped pear-shaped envelope with taper at neck. 90 degree twist in filament. No extant markings. Donor’s card reads: “Quarter turn U [i.e. single arch] filament bulb, squirted filament, dates from after 1894, in which the filament is twisted 90 degrees to give a better light pattern than the straight filament.”
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Paul G. Watson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.325075
label: catalog number
content: 325075
label: accession number
content: 252994
objectType: label: Object Name
content: Light Bulb
label: Object Name
content: incandescent lamp
label: Other Terms
content: Light Bulb; Lighting Devices; Horseshoe; Carbon
physicalDescription: label: Measurements
content: overall: 5 1/4 in x 2 3/8 in; 13.335 cm x 6.0325 cm