Telegraph Sounder

Telegraph Sounder

Usage conditions apply
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 manufactured by Western Electric, more typically known as the manufacturing company of the Bell Telephone system. Western Electric also made telegraph equipment and this unit displays the round, hollow armature often seen on their sounders.
Location
Currently not on view
Object Name
telegraph receiver
telegraph sounder
maker
Western Electric
Physical Description
wood (overall material)
brass (overall material)
rubber (overall material)
Measurements
overall: 4 1/4 in x 4 7/8 in x 8 7/8 in; 10.795 cm x 12.3825 cm x 22.5425 cm
ID Number
EM.331983
accession number
294351
catalog number
331983
collector/donor number
100-034
Credit Line
from Western Union Corporation
See more items in
Work and Industry: Electricity
Communications
Telegraph Sounders
Data Source
National Museum of American History
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