Vibroplex Telegraph Key

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Description (Brief)
Telegraph keys are electrical on-off switches used to send messages in Morse code. A semi-automatic telegraph key like this one allows an operator to send land-line and wireless (radio) telegraph messages at a much faster rate than with an ordinary key. The key automatically produces rapid morse code dots by using a weighted pendulum to quickly make and break contact in the electrical circuit. The operator still makes the dashes manually.
Currently not on view
date made
ca 1919
Martin, Horace G.
Physical Description
metal (overall material)
plastic (overall material)
overall: 3 3/8 in x 3 1/2 in x 8 in; 8.5725 cm x 8.89 cm x 20.32 cm
ID Number
catalog number
accession number
Credit Line
from Paul G. Watson
See more items in
Work and Industry: Electricity
Telegraph Keys
Data Source
National Museum of American History