Soviet telegraph driving fork

Soviet telegraph driving fork

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Usage conditions apply
Description (Brief)
Soviet-made driving fork for use in multiplex telegraphy. Captured by the U.S. Army on 4 November 1950 during an action in North Korea. Driving forks generate a tone that can be used to send a signal over a telegraph line. Only a receiver tuned to the same frequency will respond to the transmitter. That allows several units to transmit on the same line at the same time, a process telegraphers call harmonic multiplexing. After analyzing the unit, the Army sent it to the Smithsonian.
For more about this object see the 2014 blog post "How many electricity curators does it take to collect a Korean War telegraph?"
Currently not on view
Object Name
Driving Fork
multiplexing device
telegraph driving fork
date made
Western Union Corporation
Physical Description
wood (part: material)
iron (part: material)
steel (part: material)
plastic (part: material)
overall: 5 1/2 in x 15 1/2 in x 4 1/2 in; 13.97 cm x 39.37 cm x 11.43 cm
ID Number
accession number
collector/donor number
accession number
catalog number
Credit Line
from Western Union Corporation
Communication, telegraph
See more items in
Work and Industry: Electricity
Data Source
National Museum of American History
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