CMS:Early Telephone History Display
The Early Telephone History Display is the first display visitors see on the third floor of the Connections Museum. It contains a working bidirectional telegraph as well as several replicas of early telephones.
Telegraph display
Western Electric No. 21A
The Western Electric No. 21A is a bidirectional single wire telegraph. It features No. 3C sounders which amplify the signals on each side with hollow brass mounts. The tin cans mounted to the sounders were there when the telegraph was acquired by the museum. Tin cans would often be used to further amplify telegraph sounds in addition to the sounders.
Les's Typewriter
This Royal brand typewriter belonged to Les Anderson, a museum volunteer.
No. 2 Omnigraph Automatic Transmitter
This is an No. 2 Omnigraph automatic telegraph transmitter from between 1915 and 1920 which can send Morse code messages. It was used to train new telegraph operators as well as to increase the speed of established operators.
Western Electric No. 20C Sounder
Another example of a sounder rated at 100 Ohms.
Early phone replicas
Gallows transmitter
This replica of the Gallows transmitter is from a Bell commemoration.
Liquid transmitter
This replica of Alexander Graham Bell's liquid transmitter is from ??