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Heinrich Daniel Ruhmkorff


Hannover  (Allemagne) 15.January.1803 Paris 20.December.1877

1851 Spools of Ruhmkorff
Researchers already producer of electromechanical measuring instruments of high quality.  In 1851 produces an apparatus (Take the name of Ruhmkorff spool), which allows to obtain high tensions on the secondary having low voltages on admission 'primary.