Abraham-Louis Perrelet

from Wikipedia, the free encyclopedia
Abraham-Louis Perrelet

Abraham-Louis Perrelet (born January 9, 1729 in Neuchâtel ; † 1826 there ) was a Swiss watchmaker and inventor . Parallel to Hubert Sarton, he is considered to be the inventor of the automatic winding system for pocket watches with rotor and changer.

Live and act

Abraham-Louis Perrelet, the son of a farmer and carpenter, produced technical components for watchmakers in the area around Le Locle at an early age . After his apprenticeship as a watchmaker, he worked on improving the accuracy of watches and built a wide variety of escapements such as lever escapement and duplex escapement into his pocket watches . As complications he used, among other things, a monthly calendar and the representation of the equation of time .

On June 8, 1777, the physicist and naturalist Horace-Bénédict de Saussure wrote in his diary that he had met a Mr. Perlet , who builds clocks that wind themselves through the movement of the wearer. On June 11, 1777, de Saussure reported this invention to the general assembly of the Société des Arts de Genève . The automatic winding of the Liège watchmaker Hubert Sarton was notified to the Paris Academy of Sciences on December 23, 1778 .

He is also considered the inventor of the rolling machine for reworking the wheel teeth and the planner for adjusting the bearings between the work plate and the bridge or clamp. In 1780 Perrelet completed the first pedometer .

Perrelet made his last pocket watch at the advanced age of 95. His grandson, Louis-Frédéric Perrelet (1781-1852), became a French watchmaker in 1823.

literature

  • Flores, Joseph: Perpétuelles à roue de rencontre ou Montres automatiques, une page d'histoire: analyze d'un document de l'Académie française de 1778 et de ses conséquences historiques, Éditions Néo, Besançon, 2001, ISBN 2-914741-02 -2

Web links

Individual evidence

  1. ↑ de Saussure, Horace-Bénédict: Voyage à Neuchâtel 29 May - 8 June 1777 (Bibliothèque universitaire de Genève, manuscrits de la famille de Saussure, vol. 14, brochure 6).
  2. ^ Alfred Chapuis and Eugène Jaquet: La montre automatique ancienne. Un siècle et demi d'histoire 1770-1931, Neuchâtel, Griffon 1952. OCLC 6977152
  3. ↑ le procès verbal de l'académie des sciences du 23 December 1778 .
  4. ↑ Rudi Koch (ed.): BI-Lexikon - Clocks and Time Measurement , VEB Leipzig, 1986, ISBN 3-323-00100-1 ; P. 157
personal data
SURNAME Perrelet, Abraham-Louis
BRIEF DESCRIPTION Swiss watchmaker and inventor
DATE OF BIRTH January 9, 1729
PLACE OF BIRTH Neuchâtel
DATE OF DEATH 1826
Place of death Neuchâtel