As the US exploration of outer space initially involved only test pilots, by order of President Dwight D.

The demand for chronographs grew along with the aviation industry in the early part of the 20th century. Ĭhronographs were very popular with aviators as they allowed them to make rapid calculations and conduct precise timing. In 1958 the watch company Heuer introduced a model with a rotating bezel tachymeter for more complex calculations. In the early part of the 20th century, many chronographs were sold with fixed bezels marked in order to function as a tachymeter. In 1844 Adolphe Nicole's updated version of the chronograph was the first to include a re-setting feature which now allowed successive measurements, unlike the constantly moving needle in the original chronograph. Since then the 3-pusher chronograph design has been adopted by the entire industry. In 1934 Willy Breitling further developed the concept of the chronograph with the addition of the second pusher at 4 o'clock. Later, in 1923, Gaston Breitling introduced the first chronograph with a separate pusher at 2 o'clock. In 1915, Gaston Breitling produced the first chronograph with a central seconds hand and a 30-minute counter. Still in perfect working order, the Compteur de Tierces is preserved at Ateliers Louis Moinet. This frequency record stood for exactly one century, before eventually being broken in 1916 – after which standard chronometer frequencies returned to present-day levels (generally 4-5 Hz). In 1816, his Compteur de Tierces timepiece beat at a rhythm of 216,000 vibrations per hour (30 Hz).

In addition to inventing the chronograph, Louis Moinet is also the father of High Frequency. Rieussec was considered the inventor of the chronograph until the Louis Moinet pocket chronograph discovery in 2013 when history was rewritten. The King greatly enjoyed watching horse races, but wanted to know exactly how long each race lasted, so Rieussec was commissioned to invent a contraption that would do the job: as a result he developed the first ever commercialized chronograph. It was Nicolas Mathieu Rieussec who developed the first marketed chronograph at the behest of King Louis XVIII in 1821. The first modern chronograph was invented by Louis Moinet in 1816, solely for working with astronomical equipment. Early versions of the chronograph are the only ones that actually used any 'writing': marking the dial with a small pen attached to the index so that the length of the pen mark would indicate how much time had elapsed. The term chronograph comes from the Greek χρονογράφος ( khronográphos 'time recording'), from χρόνος ( khrónos 'time') and γράφω ( gráphō 'to write'). Since the 1980s, the term chronograph has also been applied to all digital watches that incorporates a stopwatch function. More modern uses of chronographs involve aircraft piloting, auto racing, diving and submarine maneuvering. Chronographs were also used heavily in artillery fire in the mid to late 1800s. Louis Moinet invented the chronograph in 1816 for use in tracking astronomical objects. In addition, many modern chronographs use moveable bezels as tachymeters for rapid calculations of speed or distance. More complex chronographs use additional complications and can have multiple sub-dials to measure seconds, minutes, hours and even fractions of a second.

A basic chronograph has an independent sweep second hand and a minute sub-dial it can be started, stopped, and returned to zero by successive pressure on the stem. Citizen Atessa Eco-Drive ATV53-3023 analog-digital chronograph with 4 area Radio Controlled reception (North America, Europe, China, Japan)Ī chronograph is a specific type of watch that is used as a stopwatch combined with a display watch.

Chronograph watch