The word chronograph derives from the Greek words chronos and graph meaning time and writing respectively. By definition, the chronographic operate is essentially that of measurement the length of a specific event. This instrument, called a timer, was fabricated and after proprietary by Rieussac, the celebrated Paris horologer to King Joseph Louis Barrow, in 1821. Of course, watches capable of comparable functions existed before this date however their preciseness left plenty to be desired. Rieussac's plan was to form Associate in Nursing instrument that might not solely provide precise timings of horse races however additionally record the results. The ink chronograph was a device made up of two parts: the lower part held a chamber for the ink while the upper part was fitted with a fine needle that, once activated, ironed on the lower half therefore leaving the ink to flow. the road copied on the face, marked so to speak, the time. Greatly valued inside the planet of watches, the chronographic functions instantly found a large vary of uses. In short, the various ways in which within which it may well be used created it indispensable not just for temporal order, however additionally for measurement speed and distance. The attainable fields within which the timer are often used ar varied: from sporting events to competitions, from displays of assorted sorts to the calculation of production times. The story of the timer entwines additionally thereupon of the medical world wherever it's additionally used for measurement heart rates. the primary Chronographs were fitted with a ceaselessly moving needle. The re-setting mechanism was fabricated in 1844 by country horologer, Adolphe Nicole, UN agency had emigrated to London. In 1862, once he had punctually proprietary his invention, he bestowed it a Associate in Nursing exhibition in London beneath his trademark of Nicole et Capt. This new system allowed for the re-setting of the needle of the timer therefore facilitating ordered measurements. The timer has been the topic of abundant analysis. when the vital changes led to by Nicole's invention another vital leap forward was created in 1870 because of the French horologer Joseph Thaddeus Winnert, who, when years of analysis, managed to form a timer with 2 hands. The mechanism allowed for the simultaneous measuring of two events of different duration and was also capable of recording two different times and intermediate times: the rattrapante (split seconds) function was born. the primary chronographs of this genre were activated by 2 buttons: one for the start/stop commands and for the re-setting of the primary hand, the other for activating the rattrapante system (the second hand). once the timer was in use, the second user may well be stopped whereas the primary one continuing with the likelihood of reactivating the second user if necessary. The second generation of rattrapante chronographs were created also as wrist watches. They were fitted with 3 totally different buttons: one for the start/stop commands, one for re-setting and another (normally on the button for winding) for the rattrapante function. to satisfy with the necessities of the medical and emergency services sectors, sociologist has, because of collaboration with a celebrated Japanese company, created a timer fitted with a pulse meter and a metastasis meter. The timer has fascinated entire generations and can still do therefore, not just for collectors and specialists, however additionally for the Brobdingnagian public created of professionals and enthusiasts. the trendy timer, a word of dynamism, has noninheritable immortality.