Jeffrey-Dewitt discs

By David Dahle; posted February 3, 2022

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In commemoration of the issuance of the J-D suspension patent on February 3rd, 1920, a picture of a set of J-D discs still in service. My research suggests this pole has been in place since 1926 - THE last original pole remaining on a line built to connect a major power plant in central North Dakota to the company's transmission system further east in the state.