Telegraph Sounder

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Description (Brief)
Telegraph sounders convert electrical pulses into audible sounds and are used to receive Morse code messages. The message travels as a series of electrical pulses through a wire. Short pulses make a dot, slightly longer pulses make a dash. The sequence of dots and dashes represent letters and numbers. The pulses energize the sounder’s electromagnets which move a lever-arm. The arm makes a loud “click” when it strikes a crossbar and the operator translates the pattern of sounds into the original language. This sounder was used by electrical inventor Moses Farmer in the course of his experiments.
Location
Currently not on view
date made
ca 1880
maker
Charles Williams, Jr.
Physical Description
wood (overall material)
brass (overall material)
rubber (overall material)
Measurements
overall: 4 1/2 in x 3 in x 5 in; 11.43 cm x 7.62 cm x 12.7 cm
ID Number
EM.181945
catalog number
181945
accession number
2015.0173
Credit Line
from Sarah J. Farmer
subject
Telegraph
See more items in
Work and Industry: Electricity
Communications
Telegraph Sounders
Data Source
National Museum of American History, Kenneth E. Behring Center

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