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 sounder shows the improvement patented by George L. Foote in 1901 (US Patent 668,257.) Foote placed a hinged bar on the sounding lever so that the armature of the sounder could be adjusted without affecting the adjustment of the whole lever.
Location
Currently not on view
Object Name
telegraph receiver
telegraph sounder
maker
Foote, Pierson & Co.
Physical Description
wood (overall material)
brass (overall material)
rubber (overall material)
Measurements
overall: 5 in x 4 in x 6 1/2 in; 12.7 cm x 10.16 cm x 16.51 cm
ID Number
EM*222133
catalog number
222133
accession number
41949
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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