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Scientific American, Vol. 43, No. 17 (October 1880) (1880)

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An illustration from Scientific American, Vol. 43, No. 17 (October 1880), 1880, leaf 0
lamp was ism which moves the commutator brush of the small ma- filed October 4.1878; the patent was granted August 10,1880. The process of manufacturing carbon was patented July 20, I860. The dynamo ma- chine, in this manner regulating the excitation of the mag- chine was patented June 8, 1880. The… … MAXIM'S CURRENT REGULATOR. © 1880 SCIENTIFIC AMERICAN, INC

Patents · Large · Inventors · Iron · Patented · Scientific American · Large number · Great Britain · Wood working · Steel wire · Tin plate · Patent issued · Electric light · Illustrated catalogue · Drying room

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