Circa 1895 Siemens Style Unipole Gramme Dyno. This Super Cool Motor Runs And Features The Use Of A Single Magnetic Pole In The Generator Which Was Intended To Simplify The Construction Of The Generator And Improve Its Efficiency, A Gramme Ring Armature Intended For It's High Efficiency And Low Resistance, And Direct Current Output To Power Electrical Systems And Machinery.  

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