Telegraph Sounder

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. According to the Western Union catalog, this sounder was purchased by a member of the company's accounting department at a New York City pawnshop around 1900.
Location
Currently not on view
date made
ca 1890
Physical Description
wood (overall material)
brass (overall material)
rubber (overall material)
Measurements
overall: 3 1/4 in x 3 in x 7 1/4 in; 8.255 cm x 7.62 cm x 18.415 cm
ID Number
EM.332375
accession number
294351
catalog number
332375
Credit Line
from Western Union Corporation
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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