experimental tipped carbon lamp
date: label: date made
content: ca 1882
notes: label: Description (Brief)
content: Experimental tipped carbon lamp, circa 1882. No base. Single-arch bamboo filaments, with carbon paste connectors, two-piece leads (?), two glass-bead insulator / lead-supports in each lamp. Pear-shaped envelopes. Bottom tipped design was used by Adams-Bagnall company. (See Electrical World) No stem was used in this lamp -- the filament assembly was inserted into the lamp and lead wires were pressed directly into the end of the envelope (flat press). This unit has a conventional tip (at the top of the lamp), but heavier glass was used in this lamp than in the other two. (Note the A-B lamps in the collections of the Mt. Vernon museum use heavy glass envelopes.)
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: Gift of Hilda P. Munroe
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.314911.03
label: catalog number
content: 314911.03
label: accession number
content: 212171
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: 6 in x 2 1/8 in; 15.24 cm x 5.3975 cm