Demonstration Dynamo

Demonstration Dynamo

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Usage conditions apply
With this demonstration dynamo, each revolution of the crank lifts the ratchet, allowing a spring to rotate the coil through 10 degrees. As the coil moves through any ten-degree interval, an E.M.F. is induced with corresponds to the mean angular displacement of the coil from its original position.
Ref: Robert Andrews Millikan and John Mills, A Short University Course in Electricity, Sound and Light (Boston, 1908), p. 134.
Central Scientific Co. Catalogue (Chicago, 1928).
Currently not on view
Object Name
Physical Description
metal (overall material)
overall: 6 1/4 in x 11 in x 5 1/2 in; 15.875 cm x 27.94 cm x 13.97 cm
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catalog number
accession number
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Medicine and Science: Physical Sciences
Data Source
National Museum of American History
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