Pierre Jaquet-Droz (; 1721–1790) was a

watchmaker A watchmaker is an artisan who makes and repairs watches. Since a majority of watches are now factory-made, most modern watchmakers only repair watches. However, originally they were master craftsmen who built watches, including all their par ...

of the late eighteenth century. He was born on 28 July 1721 in

La Chaux-de-Fonds La Chaux-de-Fonds (; archaic ) is a Swiss city in the canton of Neuchâtel. It is located in the Jura Mountains at an altitude of 992 metres, a few kilometres south of the French border. After Geneva, Lausanne, Biel/Bienne, and Fribourg, ...

, in the

Principality of Neuchâtel A principality (or sometimes princedom) is a type of monarchical state or feudal territory ruled by a prince or princess. It can be either a sovereign state or a constituent part of a larger political entity. The term "principality" is often ...

, which was then part of the

Kingdom of Prussia The Kingdom of Prussia (, ) was a German state that existed from 1701 to 1918.Marriott, J. A. R., and Charles Grant Robertson. ''The Evolution of Prussia, the Making of an Empire''. Rev. ed. Oxford: Clarendon Press, 1946. It played a signif ...

. He lived in

Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...

London London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Wester ...

, and

Geneva Geneva ( , ; ) ; ; . is the List of cities in Switzerland, second-most populous city in Switzerland and the most populous in French-speaking Romandy. Situated in the southwest of the country, where the Rhône exits Lake Geneva, it is the ca ...

, where he designed and built animated dolls known as

automata An automaton (; : automata or automatons) is a relatively self-operating machine, or control mechanism designed to automatically follow a sequence of operations, or respond to predetermined instructions. Some automata, such as bellstrikers i ...

to help his firm sell watches and mechanical caged

songbirds A songbird is a bird belonging to the suborder Passeri of the perching birds (Passerine, Passeriformes). Another name that is sometimes seen as the scientific or vernacular name is Oscines, from Latin ''oscen'', "songbird". The Passeriformes co ...

. The Jaquet Droz luxury watch brand is now owned by

The Swatch Group The Swatch Group Ltd is a Swiss manufacturer of watches and jewellery. The company was founded in 1983 through the merger of Allgemeine Gesellschaft der Schweizerischen Uhrenindustrie, ASUAG and Société Suisse pour l'Industrie Horlogère, SSIH ...

Notable works

Constructed between 1768 and 1774 by Pierre Jaquet-Droz, his son Henri-Louis (1752-1791), and Jean-Frédéric Leschot (1746-1824), the automata include ''The Writer'' (made of 6000 pieces), ''The Musician'' (2500 pieces), and ''The Draughtsman'' (2000 pieces). His astonishing mechanisms fascinated the kings and emperors of

Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...

China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...

India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...

and

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

. Some consider these devices to be the oldest examples of the

computer A computer is a machine that can be Computer programming, programmed to automatically Execution (computing), carry out sequences of arithmetic or logical operations (''computation''). Modern digital electronic computers can perform generic set ...

. ''The Writer'', a mechanical boy who writes with a

quill pen A quill is a writing tool made from a moulted flight feather (preferably a primary wing-feather) of a large bird. Quills were used for writing with ink before the invention of the dip pen/metal- nibbed pen, the fountain pen, and, eventually, ...

upon paper with real ink, has an input device to set tabs, defining individual letters written by the boy, that form a programmable memory. It has 40 cams that represent the read-only program. The work of Pierre Jaquet-Droz predates that of

Charles Babbage Charles Babbage (; 26 December 1791 – 18 October 1871) was an English polymath. A mathematician, philosopher, inventor and mechanical engineer, Babbage originated the concept of a digital programmable computer. Babbage is considered ...

by decades. The automata of Jaquet-Droz are considered to be some of the finest examples of human mechanical problem solving. Three particularly complex and still functional dolls, now known as the

Jaquet-Droz automata The Jaquet-Droz automata, among all the numerous automaton, automata built by the Jaquet-Droz family, refer to three doll automata built between 1768 and 1774 by Pierre Jaquet-Droz, his son Henri-Louis, and Jean-Frédéric Leschot: the musician, ...

, are housed at the Musée d'Art et d'Histoire (art and history museum) in Neuchâtel, Switzerland. He once constructed a clock that was capable of the following surprising movements:

There were seen on it a negro, a dog, and a shepherd; when the clock struck, the shepherd played six tunes on his flute, and the dog approached and fawned upon him. This clock was exhibited to the King of Spain, who was delighted with it. "The gentleness of my dog," said Droz, "is his least merit; if your Majesty touch one of the apples, which you see in the shepherd's basket, you will admire the fidelity of this animal." The King took an apple, and the dog flew at his hand, and barked so loud, that the King's dog, which was in the room, began also to bark; at this the Courtiers, not doubting that it was an affair of witchcraft, hastily left the room, crossing themselves as they went out. The minister of Marine was the only one that ventured to stay. The king having desired him to ask the negro what o'clock it was, the minister obeyed, but he obtained no reply. Droz then observed, that the negro had not yet learned Spanish.

References

External links

Pierre Jaquet-Droz
in the

Historical Dictionary of Switzerland The ''Historical Dictionary of Switzerland'' (Dictionnaire historique de la Suisse; DHS) is an encyclopedia on the history of Switzerland. It aims to present the history of Switzerland in the form of an encyclopaedia, published both on paper a ...

*
Montres Jaquet-Droz Story of the Jaquet-Droz androids, virtual museum and DVD
* __notoc__ {{DEFAULTSORT:Jaquet-Droz, Pierre 1721 births 1790 deaths People from the Principality of Neuchâtel People from La Chaux-de-Fonds People from Le Locle German watchmakers (people)

Notable works

Further reading

See also

References

External links