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 is one of the few units in the collection not made in America, having been made by the Automatic Telephone Manufacturing Company of Liverpool, England.

Maker: Automatic Telephone Manufacturing Co.

Location: Currently not on view

See more items in: Work and Industry: Electricity, Communications, Telegraph Sounders


Exhibition Location:

Credit Line: from Western Union Corporation

Data Source: National Museum of American History

Id Number: EM.332355Accession Number: 294351Catalog Number: 332355Collector/Donor Number: 06-30

Object Name: telegraph receivertelegraph sounder

Physical Description: wood (overall material)brass (overall material)rubber (overall material)Measurements: overall: 4 3/4 in x 3 3/8 in x 5 1/4 in; 12.065 cm x 8.5725 cm x 13.335 cm


Record Id: nmah_891413

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