Pierre Le Roy (1717–1785) was a French clockmaker. He was the inventor of the detent escapement, the temperature-compensated balance and the isochronous...

Pierre Gabriel Vincent Ernest Le Roy de Boiseaumarié (French pronunciation: [pjɛʁ ɡabʁijɛl vɛ̃sɑ̃ ɛʁnɛst lə ʁwa də bwazomaʁje]; 1890-1967), nicknamed Baron...

twentieth century, the estate came under the direction of Pierre Le Roy de Boiseaumarié. Baron Le Roy went on to be co-founder of the Institut National des...

Pierre Le Roy (1717–1785), a brilliant clock-maker in his own right, carried on the business until the early 1780s. Another son, Julien-David Le Roy (1724–1803)...

marine chronometers, following the invention of the detent escapement by Pierre Le Roy in 1748. John Arnold also invented a similar escapement in 1782. In...

Le Tellier de Montmirail performed the first measurement of longitude using marine chronometers aboard Aurore in 1767. In France, 1748, Pierre Le Roy...

Leroy, also Leeroy, LeeRoy, Lee Roy, LeRoy, Le Roy or Roy is both a male given name and a surname. In France, this family name originated from the Normans...

began to outperform them in competition. The early form was invented by Pierre Le Roy in 1748, who created a pivoted detent type of escapement, though this...

varieties, were amended to thirteen in 1936 and eighteen in 2009. Baron Pierre le Roy of Château Fortia was the principal architect of these regulations which...

The organization was co-founded by Châteauneuf-du-Pape producer Baron Pierre Le Roy. Every appellation d'origine contrôlée (AOC), the French term for PDOs...

to manage wine-processing in France. In the Rhone wine region Baron Pierre Le Roy Boiseaumarié, a lawyer and winegrower from Châteauneuf-du-Pape, obtained...

bimetallic temperature-compensated balance wheel invented in 1765 by Pierre Le Roy and improved by Thomas Earnshaw (1749–1829). The lever escapement, the...

Berthoud worked for a time for Julien Le Roy, where he is said to have made strikingly swift progress, alongside Pierre Le Roy, his master's son, who later became...

Emmanuel Bernard Le Roy Ladurie (French pronunciation: [emanɥɛl bɛʁnaʁ lə ʁwa ladyʁi], 19 July 1929 – 22 November 2023) was a French historian whose work...

wines at the initiative of Joseph Capus. In the Rhône wine region Baron Pierre Le Roy Boiseaumarié, a trained lawyer and winegrower from Châteauneuf-du-Pape...

Jacques Jules Marie Joseph Le Roy Ladurie (French pronunciation: [ʒak ʒyl maʁi ʒozɛf lə ʁwa ladyʁi]; 28 March 1902 – 6 June 1988) was a French agriculturalist...

because of its complexity. A simpler solution was devised around 1765 by Pierre Le Roy, and improved by John Arnold, and Thomas Earnshaw: the Earnshaw or compensating...

Charles Le Roy was the youngest of the four sons of French watchmaker Julien Le Roy (1686–1759). He had three brothers, the watchmaker Pierre Le Roy (1717–1785)...

were considered. Two clock-makers dominated, Ferdinand Berthoud and Pierre Le Roy. Four sea trials took place between 1767 and 1772, evaluating lunar...

astronomer (died 1783) November 16 – Jean le Rond d'Alembert, French mathematician (died 1783) Pierre Le Roy, French clockmaker (died 1785) Wilhelm Friedrich...

bimetallic temperature compensated balance wheel invented in 1765 by Pierre Le Roy and improved by Thomas Earnshaw. This type of balance wheel had two...

Julien Le Roy (French: [edwaʁ ləʁwa] ; 18 June 1870 in Paris – 10 November 1954 in Paris) was a French philosopher and mathematician. Le Roy entered...

built, then the Perrine tower and a "Bailliverie". Later, under abbot Pierre Le Roy, a lodging wing was added, adding at the same time to the abbey fortifications...

thirteenth and early fourteenth century. He is the central figure in Emmanuel Le Roy Ladurie's 1975 book Montaillou, a pioneering work of microhistory. Since...

translated as the International Automobile Federation. Detent escapement by Pierre Le Roy in 1748. Carcel burner in 1800. developments of battery Dry cell battery...

Henlein, Germany Peter Hill (1767-1820), African-American clockmaker. Pierre Le Roy, France Rasmus Sørnes, Norway Richard Donisthorp, United Kingdom Richard...

the Longitude Act, it was not widely adopted. Around 1765, Pierre Le Roy (son of Julien Le Roy) invented the compensation balance, which became the standard...

English watchmaker, London. inventor of the free lever escapement. Pierre Le Roy (1717–1785), French watchmaker, Paris, marine chronometer. Joseph Gallmeyr...

all over France. In 1923, the local wine producers led by the lawyer Pierre Le Roy de Boiseaumarié began a campaign to establish legal protection for the...

1709) December 12 – Edmé-Louis Daubenton, French naturalist (born 1730) Pierre Le Roy, French clockmaker (born 1717) Saverio Manetti, Italian natural historian...