Hippolyte Pixii on a picture from 1835 First magnetic-electric alternator, built in 1832 by Hippolyte Pixii
Antoine-Hippolyte Pixii (1808 - 1835) was a French instrument builder in Paris. In the short while he lived - he only became 27 years old - he made a significant contribution to the development of electrical engineering.
In 1832, he built the first alternator, based on Michael Mangaday's principle of electromagnetic induction. Pixii's device contained two rotary magnets driven by a spinning wheel, which moved past a coil of iron core. In 1833 he built the first generator with pulsating direct current thanks to the commutator invented and proposed by André-Marie Ampère.
In addition to the dynamo, Pixii designed and built many other physical instruments and appliances; two of them were a dilatation pyrometer and a double-cylinder vacuum pump.
wiki
