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 so-called "Secret Sounder" is actually a portable telegraph unit made to resemble a pocket watch.
Location
Currently not on view
Object Name
telegraph sounder
maker
Manufacturers' and Inventors' Electric Co.
Physical Description
steel (overall material)
glass (overall material)
cloth (overall material)
brass (overall material)
Measurements
overall: 2 1/4 in x 1 1/4 in x 1/4 in; 5.715 cm x 3.175 cm x .635 cm
ID Number
EM*331985
catalog number
331985
accession number
294351
collector/donor number
100-053
serial number
4043
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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