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Le Roy, Pierre
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Pierre Le Roy
Pierre Le Roy
(1717–1785) was a French
clockmaker
. He was the inventor of the
detent escapement
, the
temperature-compensated balance
and the
isochronous balance spring
. His developments are considered as the foundation of the modern precision
clock
. Le Roy was born in
Paris
, eldest son of
Julien Le Roy
, a clockmaker to
Louis XV
who had worked with
Henry Sully
, in which place Pierre Le Roy succeeded his father. He had three brothers:
Jean-Baptiste Le Roy
(1720-1800), a physicist;
Julien-David Le Roy
(1724–1803), an architect; and
Charles Le Roy
(1726–1779), a physician and
encyclopédiste
.
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1
Memoires concernans le controle des rentes, ou, Recueil abregé de tous les titres qui établissent les offices, privileges, droits, fonctions & devoirs des contrôleurs des rentes de...
by
Le
Roy
,
Pierre
Published 1717
Chez P.A. Le Mercier
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2
Statuts et privilèges du Corps des marchands orfèvres-joyailliers de la ville de Paris : recueillis des textes de tous les édits, ordonnances, déclarations, lettres patentes, arrêt...
by
Le
Roy
,
Pierre
Published 1734
Paulus-du-Mesnil
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3
An account of the new northern archipelago : lately discovered by the Russians in the seas of Kamtschatka and Anadir
by
Staehlin, Jakob von
Published 1774
Printed for C. Heydinger
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Roy
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