Carbon "Stopper" Lamp with Adapter

Description (Brief)
Westinghouse made stopper lamps to avoid infringing Edison's patents. The lamp is based on Sawyer-Man patents and includes a removable adapter to allow use of the lamp in both the special sockets made for stopper lamps and standard Westinghouse sockets.
Object Name
incandescent lamp
date made
ca 1894
overall: 6 1/2 in x 2 5/8 in; 16.51 cm x 6.6675 cm
place made
United States: Pennsylvania, Pittsburgh
ID Number
catalog number
accession number
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Work and Industry: Electricity
Electric Lamps
American Enterprise
Energy & Power
American Enterprise
Exhibition Location
National Museum of American History
Data Source
National Museum of American History, Kenneth E. Behring Center


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