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- Telegraph Sounder, 1850-1900 -
- 1850-1900
- Collections - Artifact
Telegraph Sounder, 1850-1900
- Telegraph Key and Sounder, 1886 -
- 1886
- Collections - Artifact
Telegraph Key and Sounder, 1886
- Telegraph Sounder, Made by George M. Phelps, 1860-1865 -
- 1860-1865
- Collections - Artifact
Telegraph Sounder, Made by George M. Phelps, 1860-1865
- J.H. Bunnell Telegraph Sounder, Used at Ford Motor Company -
- circa 1905
- Collections - Artifact
J.H. Bunnell Telegraph Sounder, Used at Ford Motor Company
- Western Union Main Line Sounder Housed in Portable Resonator, circa 1925 - This telegraph sounder creates audible tones that correspond to the signals of Morse code from an electrical telegraph. A metal arm influenced by an electromagnet makes clicking and clacking noises as the current is switched on and off. These sounds are translated into the dots and dashes of code. A wooden box amplifies the sound even further for the operator.
- circa 1925
- Collections - Artifact
Western Union Main Line Sounder Housed in Portable Resonator, circa 1925
This telegraph sounder creates audible tones that correspond to the signals of Morse code from an electrical telegraph. A metal arm influenced by an electromagnet makes clicking and clacking noises as the current is switched on and off. These sounds are translated into the dots and dashes of code. A wooden box amplifies the sound even further for the operator.
- Martin's Autoplex Telegraph Sounder, 1904-1905 -
- 1904-1905
- Collections - Artifact
Martin's Autoplex Telegraph Sounder, 1904-1905
- Bunnell Telegraph Sounder, Type 253, 1878-1900 -
- 1878-1900
- Collections - Artifact
Bunnell Telegraph Sounder, Type 253, 1878-1900
- Western Electric Model 15B Main Line Telegraph Sounder, 1875-1900 -
- 1875-1900
- Collections - Artifact
Western Electric Model 15B Main Line Telegraph Sounder, 1875-1900