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 unusual sounder includes a switch on the base. Presumably this allows the operator to switch between different telegraph lines.
Location
Currently not on view
Object Name
telegraph receiver
telegraph sounder
date made
ca 1880
Physical Description
wood (overall material)
brass (overall material)
rubber (overall material)
Measurements
overall: 4 1/4 in x 3 1/2 in x 7 5/8 in; 10.795 cm x 8.89 cm x 19.3675 cm
ID Number
EM*332354
collector/donor number
06-27
accession number
294351
catalog number
332354
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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