chronometer is slow

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• Observatory Chronometer — In the world of mechanical timepieces, accuracy is paramount. In the times before electronics, mechanical timepieces called marine chronometers were developed to a very high degree of accuracy and used for maritime navigation. In order to test… …   Wikipedia

• COSC — This article is about the Swiss Official Chronometer Testing Institute, known by its French acronym of COSC. For the state college in Connecticut, see Charter Oak State College. Contrôle Officiel Suisse des Chronomètres COSC aka C.O.S.C. is… …   Wikipedia

• Escapement — redirects here. For the fisheries term for the stock surviving fishing pressures over a spawning cycle, see Spawn (biology). For other uses, see Escapement (disambiguation). A deadbeat escapement, used in many pendulum clocks. Click above to see… …   Wikipedia

• John Harrison — Infobox Scientist name = John Harrison |300px image width = 260px caption = P.L. Tassaert s half tone print of Thomas King s original 1767 portrait of John Harrison, located at the Science and Society Picture Library, London birth date = birth… …   Wikipedia

• History of timekeeping devices — For thousands of years, devices have been used to measure and keep track of time. The current sexagesimal system of time measurement dates to approximately 2000 BC, in Sumer. The Ancient Egyptians divided the day into two 12 hour periods, and… …   Wikipedia

• Radiometric dating — (often called radioactive dating) is a technique used to date materials such as rocks, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates.[1]… …   Wikipedia

• Time dilation — This article is about a concept in physics. For the concept in sociology, see time displacement. In the theory of relativity, time dilation is an observed difference of elapsed time between two events as measured by observers either moving… …   Wikipedia

• Time — This article is about the measurement. For the magazine, see Time (magazine). For other uses, see Time (disambiguation). The flow of sand in an hourglass can be used to keep track of elapsed time. It also concretely represents the present as… …   Wikipedia

• Balance spring — A balance spring, or hairspring, is a fine spiral or helical spring used in mechanical watches, marine chronometers, and other timekeeping mechanisms to control the rate of vibration of the balance wheel. A balance spring usually has a regulator… …   Wikipedia

• Uhr — In den ältesten Zeiten benutzte man zur Zeitbestimmung senkrecht aufgestellte Stäbe, Gnomone, deren Schattenlänge oder Schattenrichtung die Tageszeit erkennen ließ. Aus diesen Sonnenzeigern (Sonnenweisern, Stundensteinen) entstanden die… …   Meyers Großes Konversations-Lexikon

• Shipwreck — A shipwreck can refer to a wrecked ship or to the event that caused the wreck, such as the striking of something that causes the ship to sink, the stranding of the ship on rocks, land or shoal, or the destruction of the ship at sea by violent… …   Wikipedia