Contributed by Maine Historical Society
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The "pintype" insulator, with a socket in the base that screws on to a threaded wooden or metal "pin" mounted on the utility pole, was patented in 1865.
Earlier insulators were secured to the pins by various means (padding with burlap, or perhaps sticking down with tar).
Insulators keep the current in the grid and prevent it from "leaking" where it would be wasted or creating a hazard.
About This Item
- Title: Pintype electric insulator, ca. 1916
- Creator: Lapp Insulator Co.
- Creation Date: circa 1916
- Subject Date: circa 1916
- Media: Porcelain
- Local Code: 2004.090.4427
- 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 x219
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