Item 74824 - Electrical insulator pin, ca. 1917
- Item 74824 - Electrical insulator pin, ca. 1917
- Contributed by Maine Historical Society
- Item 74824
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Image Info The pin is part of a type of electrical insulator -- a device that keeps electrical current from "leaking" out of lines.
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The insulator with the pin (that screws into the base of the porcelain insulator) was patented in 1865.