Pierre Jaquet-Droz was a Swiss watchmaker and automaton builder, he was a famous watchmaker and like his son Henri-Louis (1752-1791), a brilliant designer of clocks and automata (the so-called androids). He was born July 28, 1721 in Villeret and died on November 28, 1790 in Biel.

Jaquet-Droz, in around 1755 invented a unique form of automatic winding for watches. As an energy source he used the different expansion behavior of two metals at temperature fluctuations, which he converted into kinetic energy.
The watch manufacturer Jaquet Droz, which belongs to the Swatch Group, is named after Pierre Jaquet-Droz.

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