Chronograph

For an instrument used to measure velocity of a projectile fired from a gun, see gun chronograph.

Electa Pocket Chronograph (ca. 1890s) manufactured by the Gallet Watch Company in La Chaux-de-Fonds, Switzerland.

A modern Seiko quartz wristwatch using the chronograph function (movement 7T92).

Citizen Atessa Eco-Drive ATV53-3023 analog-digital chronograph with 4 area Radio Controlled reception (North America, Europe, China, Japan).

A chronograph is a timepiece or watch with both timekeeping and stopwatch functions as well as other functions. Pocket watch chronographs were produced as early as the 18th century but did not become popular until the 1820s.^[1] The term "chronograph" is often confused with the term "chronometer," which usually designates a watch that has received a precision certification from the COSC.^[2] The Marine chronometer was an accurate timepiece used to enable celestial navigation.

Types

There are both digital as well as analog-digital chronographs.^[1][3]

• Digital chronographs use a digital display for both timekeeping and stopwatch functions, either with separate displays or by switching modes on a single display.

• Analog-digital chronographs have a standard analog watch with permanent centre seconds and a separate digital display that usually operates independently of the analog section. A fallback will reset to zero and then continue to run when the reset button is pushed while the stopwatch is running. In contrast, most mechanical chronographs will reset only when the stopwatch is stopped.

See also

• Nicolas Mathieu Rieussec, the inventor of the first chronograph
• Double chronograph
• Flyback chronograph
• Complication
• Chronometer
• Marine chronometer

Bibliography

• Lang, Gerd R.; Meis, Reinhard (1993), Chronograph Wristwatches To Stop Time, Germany: Schiffer, ISBN 0-88740-502-9 .

References

1. ^ ^{a b} "A Brief History of the Automatic Chronograph". Archived from the original on 2007-08-24. http://web.archive.org/web/20070824160555/http://www.ozdoba.net/swisswatch/autochrono.html. Retrieved 2007-01-02. 
2. ^ "How to Buy A Watch Online". http://www.bestluxurywatchesonline.com/how-to-buy-a-watch/. Retrieved 7 October 2011. 
3. ^ "History of the Chronograph Watch". http://www.topoftheline.com/hiofchwa.html. Retrieved 2007-01-02. 

External links

• http://www.kalyanediffusion89.com/pieces-de-montres/valjoux/
• History of the Chronograph Watch
• Directory of Men's Chronographs
• A short history of Chronographs
• Professional Watch Glossary
• A Video Showing the Assembly of a Modern Mechanical Chronograph Movement
• Maddox's Examples in Using the Chronograph