Telegraph Sounder Magnets
Telegraph Sounder Magnets
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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 is a patent model for an early form of sound amplifier. The patent covers the addition of a rod attached to the anvil on the electromagnet and connected to the ends of the wooden box. When the lever strikes the anvil, the vibration is also transmitted through the rod to the box boosting the sound.
- Location
- Currently not on view
- Object Name
- telegraph receiver
- telegraph sounder
- Object Type
- Patent Model
- date made
- 1865
- maker
- Clark, James J.
- Splitdorf, Henry
- Physical Description
- wood (overall material)
- metal (overall material)
- cloth (overall material)
- Measurements
- overall: 4 1/4 in x 9 3/4 in x 5 1/2 in; 10.795 cm x 24.765 cm x 13.97 cm
- ID Number
- EM.308900
- catalog number
- 308900
- accession number
- 89797
- patent number
- 49857
- See more items in
- Work and Industry: Electricity
- Communications
- Telegraph Sounders
- Data Source
- National Museum of American History
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