A chronograph is a timepiece or watch

Watch

A watch is a small timepiece, typically worn either on the wrist or attached on a chain and carried in a pocket, with wristwatches being the most common type of watch used today. They evolved in the 17th century from spring powered clocks, which appeared in the 15th century. The first watches were...

  with both time

Time

Time is a part of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify rates of change such as the motions of objects....

keeping and stopwatch

Stopwatch

A stopwatch is a handheld timepiece designed to measure the amount of time elapsed from a particular time when activated to when the piece is deactivated. A large digital version of a stopwatch designed for viewing at a distance, as in a sports stadium, is called a stopclock.The timing functions...

 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. The term "chronograph" is often confused with the term "chronometer

Chronometer

Chronometer may refer to:* Chronometer watch, a watch tested and certified to meet certain precision standards* Hydrochronometer, a water clock* Marine chronometer, a timekeeper used for celestial navigation...

," which usually designates a watch that has received a precision certification from the COSC

COSC

COSC aka C.O.S.C. is Contrôle Officiel Suisse des Chronomètres, the Official Swiss Chronometer Testing Institute, which is the institute responsible for certifying the accuracy and precision of wristwatches in Switzerland.-Background:...

. The Marine chronometer

Marine chronometer

A marine chronometer is a clock that is precise and accurate enough to be used as a portable time standard; it can therefore be used to determine longitude by means of celestial navigation...

 was an accurate timepiece used to enable celestial navigation.

Types

There are both digital as well as analog-digital chronographs.

• 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
  Nicolas Mathieu Rieussec
  Nicolas Mathieu Rieussec was a French watchmaker, who invented the chronograph in 1822.- Origin of the Rieussec Name :...
  
  , the inventor of the first chronograph
• Double chronograph
  Double chronograph
  Double chronograph is a watch that includes two separate stopwatch mechanisms in order to estimate two separate events of different durations. It is often confused with the flyback chronograph.-Functioning:...
  
  
• Flyback chronograph
  Flyback chronograph
  A flyback chronograph is a complication watch, which uses a single push of the button for stopping, resetting and restarting the chronograph function of the watch.-Other names:The flyback function has also some other names:* Retour-en-vol * Taylor system...
  
  
• Complication
  Complication (horology)
  In horology , complication refers to any feature in a timepiece beyond the simple display of hours, minutes, and seconds.A timepiece indicating only hours, minutes, and seconds is otherwise known as a simple movement...
  
  
• Chronometer
  Chronometer
  Chronometer may refer to:* Chronometer watch, a watch tested and certified to meet certain precision standards* Hydrochronometer, a water clock* Marine chronometer, a timekeeper used for celestial navigation...
  
  
• Marine chronometer
  Marine chronometer
  A marine chronometer is a clock that is precise and accurate enough to be used as a portable time standard; it can therefore be used to determine longitude by means of celestial navigation...
  
  

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