Patent model, Gray circuit breaker for harmonic telegraph, US Patent #173,460

Patent model, Gray circuit breaker for harmonic telegraph, US Patent #173,460

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Location
Currently not on view
Object Name
Telegraph Circuit Breaker, Electro Harmonic
circuit breaker
date made
1875
maker
Gray, Elisha
Measurements
overall: 2 3/4 in x 1 5/8 in x 11 3/4 in; 6.985 cm x 4.1275 cm x 29.845 cm
ID Number
EM.308881
catalog number
308881
accession number
89797
patent number
173460
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Work and Industry: Electricity
Data Source
National Museum of American History
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