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. This double sounder was one part of a patent model demonstrating a two-circuit telegraph relay system.
- Location
- Currently not on view
- Object Name
- telegraph receiver
- telegraph relay
- telegraph sounder
- Object Type
- Patent Model
- Other Terms
- telegraph sounder; Telegraphy
- date made
- ca 1872
- maker
- L. G. Tillotson & Co.
- Physical Description
- wood (overall material)
- brass (overall material)
- rubber (overall material)
- Measurements
- overall: 3 1/2 in x 4 3/4 in x 6 3/4 in; 8.89 cm x 12.065 cm x 17.145 cm
- ID Number
- EM.251259
- catalog number
- 251259
- accession number
- 48865
- patent number
- 223248
- 130426
- See more items in
- Work and Industry: Electricity
- Communications
- Telegraph Sounders
- Data Source
- National Museum of American History
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