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Electrical insulator pin, ca. 1917

Electrical insulator pin, ca. 1917

Item 74824 zoom send e-card Share this on Facebook Share this on Twitter

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The pin is part of a type of electrical insulator -- a device that keeps electrical current from "leaking" out of lines.

The insulator with the pin (that screws into the base of the porcelain insulator) was patented in 1865.

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