Telegraph Sounder

Telegraph Sounder

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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. Instruments of this type were donated by the manufacturer tor use in the American Telegrapher's Tournament Association Contest held at Philadelphia on October 30 and 31, 1903. The price in 1905 for this sounder with an aluminum lever was $2.25, today that would be about $58.00.
Location
Currently not on view
Object Name
telegraph receiver
telegraph sounder
date made
ca 1905
maker
Manhattan Electric Supply Co.
Physical Description
wood (overall material)
brass (overall material)
rubber (overall material)
aluminum (overall material)
Measurements
overall: 4 3/4 in x 4 in x 6 1/2 in; 12.065 cm x 10.16 cm x 16.51 cm
ID Number
EM.222130
accession number
41948
catalog number
222130
Credit Line
from Manhattan Electric Supply Co.
See more items in
Work and Industry: Electricity
Communications
Telegraph Sounders
Data Source
National Museum of American History
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