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Sangamo Type H electric meter, 1911

Contributed by Maine Historical Society

Sangamo Type H electric meter, 1911

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This model had been in development for some time before its introduction in 1911, but Sangamo had to wait for the Tesla patents, owned by Westinghouse, to expire.

This induction-type meter uses fluctuations in magnetic fields to turn the rotating disk, while a drag, or lag, magnet keeps the disk turning at a rate proportional to the current.

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Other Information

  • Title: Sangamo Type H electric meter, 1911
  • Creator: Sangamo Electric Co.
  • Creation Date: 1911
  • Subject Date: circa 1911
  • Media: Metal, glass
  • Local Code: 2004.090.1453
  • 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

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