Onésiphore Pecqueur
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Onésiphore Pecqueur (1792–1852) was a French mechanical engineer who patented the modern-day differential gear, found on the axles that connect to the powertrain of all automobiles.
Early life
He was born in the Pas-de-Calais.
Career
He worked as a watchmaker. In 1823 he won the National Exhibition Gold Medal for inventing a watch that showed sidereal and mean time.
He invented the differential in 1827 (known in French as the différentiel mécanique). He invented it whilst at the Conservatoire des Arts et Métiers. It was derived from his work as a watchmaker, whereby cogs move at different rates. The differential allowed the adjustment of rotational ratios of two wheels turning on the same axle.
Personal life
He died in Paris in 1852.
References
External links
Categories:
- Articles with short description
- Short description is different from Wikidata
- Articles with ISNI identifiers
- Articles with VIAF identifiers
- Articles with BNF identifiers
- Articles with BNFdata identifiers
- Articles with SUDOC identifiers
- 1792 births
- 1852 deaths
- French automotive pioneers
- 19th-century French inventors
- French mechanical engineers
- People from Pas-de-Calais
- French watchmakers (people)
- Watchmakers (people)