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Telegraph relay, ca. 1900

Contributed by Maine Historical Society

A telegraph relay, used as a signal amplifier in long-distance circuits, is often referred to as a "pony relay."

The base is cast iron, topped by a wooden plate. Two induction coils with steel covers are attached to a brass frame. Stamped into the wooden plate is the information: "W.U. Tel Co, Morse relay 4-B, 150 ohms."


Other Information


  • Title: Telegraph relay, ca. 1900
  • Creator: Western Union Telegraph Co.
  • Creation Date: circa 1900
  • Subject Date: circa 1900
  • Media: Wood, brass, cast iron
  • Dimensions (cm): 9 x 23 x 12
  • Local Code: 2004.090.0060
  • Collection: Central Maine Power Co.
  • Object Type: Physical Object

For more information about this item, contact:

Maine Historical Society
489 Congress Street, Portland, ME 04101
(207) 774-1822
http://www.mainehistory.org

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