The principal parts of a watch, 1741
Detail of an engraving from Antoine Thiout l'aîné, Traité de l'horlogerie mechanique et pratique (Paris, 1741), vol. 2, pl. 34
Engraving
Technical Glossary
Detail of an engraving from Antoine Thiout l'aîné, Traité de l'horlogerie mechanique et pratique (Paris, 1741), vol. 2, pl. 34
Engraving
9 1/2 x 15 in. (24.1 x 38.1 cm)
Thomas J. Watson Library (146.9/T34)
Thiout became a master clockmaker in Paris in 1724 and died there in 1767. His treatise, on clockmaking became a standard text of its time. His construction of a watch with a verge escapement driven by a mainspring encased in a barrel (number 7 in the print) and regulated by a cone-shaped fusee (number 8 in the print) is not greatly different from that of a seventeenth-century watch.
