Provo-type electrical insulator, ca. 1897

Contributed by Maine Historical Society

Provo-type electrical insulator, ca. 1897

Purchase a reproduction of this item on


This style of glass insulator was originally made in 1898 for the Telluride Power Transmission Company in Provo, Utah, which used it to construct a long high voltage line.

It proved unreliable at high voltage, but worked well at lower voltages, and remained a popular technology for 22kV transmission lines throughout the United States until porcelain multipart insulators were developed.

View/Add Comments

About This Item

  • Title: Provo-type electrical insulator, ca. 1897
  • Creator: Hemingray Glass Co.
  • Creation Date: circa 1897
  • Subject Date: circa 1897
  • Media: Glass
  • Local Code: 2004.090.3297
  • Collection: Central Maine Power Company collection
  • Object Type: Physical Object

For more information about this item, contact:

Maine Historical Society
485 Congress Street, Portland, ME 04101
(207) 774-1822 x230

Cross Reference Searches

LC Subject Headings

Please post your comment below to share with others. If you'd like to privately share a comment or correction with MMN staff, please use this form.