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. This is a typical telegraph sounder of the 1870s, made by L. G. Tillotson and Company, a well-known maker of telegraph equipment in that era.
Location
Currently not on view
Object Name
telegraph sounder
date made
ca 1874
maker
L. G. Tillotson & Co.
Physical Description
wood (overall material)
brass (overall material)
Measurements
overall: 3 3/4 in x 6 in x 3 1/4 in; 9.525 cm x 15.24 cm x 8.255 cm
ID Number
EM*332374
catalog number
332374
accession number
294351
subject
Communications
Telegraph Sounders
See more items in
Work and Industry: Electricity
Telegraph Sounders
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
from Western Union Corporation
Additional Media

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