Object Details
- Automatic Telephone Manufacturing Co.
- 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.
- Location
- Currently not on view
- Credit Line
- from Western Union Corporation
- ID Number
- EM.332355
- accession number
- 294351
- catalog number
- 332355
- collector/donor number
- 06-30
- Object Name
- telegraph receiver
- telegraph 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
- See more items in
- Work and Industry: Electricity
- Communications
- Telegraph Sounders
- National Museum of American History
- Record ID
- nmah_891413
- GUID (Link to Original Record)
- https://n2t.net/ark:/65665/ng49ca746a7-2a08-704b-e053-15f76fa0b4fa
