CMS:Early Telephone History Display: Difference between revisions

Latest revision as of 17:45, 11 March 2025

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 ??

Williams "Coffin" telephone

Telephone with Blake Transmitter

@@ Line 9: / Line 9: @@
 === Les's Typewriter ===
-This typewriter belonged to [[CMS:Les Anderson|Les Anderson]], a museum volunteer
+This [[wikipedia:Royal_Typewriter_Company|Royal]] brand typewriter belonged to [[CMS:Les Anderson|Les Anderson]], a museum volunteer.
-=== Omnigraph Automatic Transmitter ===
+=== No. 2 Omnigraph Automatic Transmitter ===
-This is an automatic telegraph transmitter from 1903 which can send Morse code messages. It was used to train new telegraph operators as well as to increase the speed of established operators. The Omnigraph was used by the US Government as well as universities and schools. Prices would range from $2.50 to $18.00 (equivalent to ${{Inflation|US|start_year=1903|end_year=2023|value=2.50|fmt=c}} to ${{Inflation|US|start_year=1903|end_year=2023|value=18|fmt=c}} in 2023) depending on the model.
+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.
-=== Other sounders ===
+=== Western Electric No. 20C Sounder ===
+Another example of a sounder rated at 100 Ohms.
 == Early phone replicas ==