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. Like several instruments donated by Western Union, this sounder bears a stamp "N.Y.R.S." and a date, "2 29" in this case. That stamp indicates that this sounder was sent to the company's New York Repair Shop and was serviced in February 1929.
Location
Currently not on view
Object Name
telegraph receiver
telegraph sounder
maker
Manhattan Electric Supply Co.
Physical Description
wood (overall material)
brass (overall material)
rubber (overall material)
Measurements
overall: 3 1/2 in x 2 7/8 in x 5 1/2 in; 8.89 cm x 7.3025 cm x 13.97 cm
ID Number
EM*332362
collector/donor number
06-16
accession number
294351
catalog number
332362
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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