Chronograph

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Pocket chronograph

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

A chronograph is a timepiece or watch with both timekeeping and stopwatch 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 in some cases designates a watch that has received a precision certification. The Marine chronometer was an accurate timepiece used to enable celestial navigation.

[edit] Types

There are many types of chronographs.^[1][2]

• 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 center 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 to zero only when the stopwatch is stopped.

[edit] See also

• Double chronograph
• Flyback chronograph
• Complication
• Chronometer
• Marine chronometer

[edit] Notes

1. ^ ^{a b} "A Brief History of the Automatic Chronograph". http://web.archive.org/web/20070824160555/http://www.ozdoba.net/swisswatch/autochrono.html. Retrieved on 2007-01-02. 
2. ^ "History of the Chronograph Watch". http://www.topoftheline.com/hiofchwa.html. Retrieved on 2007-01-02. 

[edit] References

• History of the Chronograph Watch