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clock summary | Britannica

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SUBSCRIBESUBSCRIBESUBSCRIBEHomeHistory & SocietyScience & TechBiographiesAnimals & NatureGeography & TravelArts & CultureProConMoneyGames & QuizzesVideosOn This DayOne Good FactDictionaryNew ArticlesHistory & SocietyLifestyles & Social IssuesPhilosophy & ReligionPolitics, Law & GovernmentWorld HistoryScience & TechHealth & MedicineScienceTechnologyBiographiesBrowse BiographiesAnimals & NatureBirds, Reptiles & Other VertebratesEnvironmentFossils & Geologic TimeInsects & Other InvertebratesMammalsPlantsGeography & TravelGeography & TravelArts & CultureEntertainment & Pop CultureLiteratureSports & RecreationVisual ArtsImage GalleriesPodcastsSummariesTop QuestionsLists and StoriesBritannica KidsAsk the ChatbotGames & QuizzesHistory & SocietyScience & TechBiographiesAnimals & NatureGeography & TravelArts & CultureProConMoneyVideosHomeTechnologyEngineeringMechanical EngineeringFacebookXhttps://www.britannica.com/summary/clockThe Editors of Encyclopaedia Britannica Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....clockA classic pendulum clock. The power to run the clock comes from a slowly falling weight (other mechanical clocks utilize a spring). The escapement prevents the weight from falling all at once, and the swinging pendulum regulates the rate at which the escapement allows the clock's wheels (gears) to turn. The time required for a complete swing (period) of the pendulum depends only on the pendulum's length: a 39-in. (990-mm) pendulum has a period of one second.Christiaan HuygensBig Ben SummaryThomas Tompion Summarywatch Summary

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