Wheat Electric Cap Lamp

The Koehler Manufacturing Company produced this battery-powered cap lamp during the first half of the 20th century. Inventor Grant Wheat designed this lamp, leading to this type of lamp being called a “Wheat Lamp.” The battery is encased in a self-locking black plastic case worn on the miner’s belt. A flexible cord traveled from the battery to the lamp, which was worn on a mining cap. The metal seal between the case and the lid is stamped “WHEAT LAMP / KOEHLER MG. CO / MARLBORO, MASS."
Currently not on view
battery box: 7 1/2 in x 5 1/2 in x 2 1/2 in; 19.05 cm x 13.97 cm x 6.35 cm
wire: 44 1/2 in; 113.03 cm
light: 3 1/2 in x 3 1/2 in x 3 1/2 in; 8.89 cm x 8.89 cm x 8.89 cm
ID Number
accession number
catalog number
Credit Line
Mary R. Wheat
See more items in
Work and Industry: Mining
Industry & Manufacturing
Grant Wheat Collection
Mining Lamps
Data Source
National Museum of American History


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