Flame-proof Telegraph Key

Description (Brief)
Telegraph keys are electrical on-off switches used to send messages in Morse code and can spark when the circuit opens. Flame-proof telegraph keys, like this one made by General Radio, were designed to contain the spark within a sealed chamber. These keys were necessary on early aircraft and in confined spaces such as aboard ships and submarines where the spark might ignite flammable gasses.
Location
Currently not on view
date made
ca 1918
maker
General Radio Company
Measurements
overall: 1 1/2 in x 2 3/4 in x 5 in; 3.81 cm x 6.985 cm x 12.7 cm
ID Number
2013.0030.02
accession number
2013.0030
catalog number
2013.0030.02
See more items in
Work and Industry: Electricity
Communications
Telegraph Keys
Data Source
National Museum of American History, Kenneth E. Behring Center

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