When brothers Adolf and Ernst Ruhstrat founded an electric company in 1888, they had little idea of the success story they had initiated. Their cooperation with German Nobel Prize winner Professor Walter Nernst from the University of Göttingen only six years later led to the construction of an adjustable sliding resistor which was to become the basis for adjustable resistances, voltage, and current, a novelty in the still young and developing market of electronic appliances. Further developments entailed the manufacture of the first resistance-heated high-temperature furnace, which also involved the engineering and manufacture of the transformer needed for the operation of the furnaces.

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