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- Shortt-Synchronome_clock abstract "The Shortt-Synchronome free pendulum clock was a complex precision electromechanical pendulum clock invented in 1921 by British railway engineer William Hamilton Shortt in collaboration with horologist Frank Hope-Jones, and manufactured by the Synchronome Co., Ltd. of London, UK. They were the most accurate pendulum clocks ever commercially produced, and became the highest standard for timekeeping between the 1920s and the 1940s, after which mechanical clocks were superseded by quartz time standards. They were used worldwide in astronomical observatories, naval observatories, in scientific research, and as a primary standard for national time dissemination services. The Shortt was the first clock to be a more accurate timekeeper than the Earth itself; it was used in 1926 to detect tiny seasonal changes in the Earth's rotation rate. Shortt clocks achieved accuracy of around a second per year, although a recent measurement indicated they were even more accurate (see below). About 100 were produced between 1922 and 1956.Shortt clocks kept time with two pendulums, a master pendulum swinging in a vacuum tank and a slave pendulum in a separate clock, which was synchronized to the master by an electric circuit and electromagnets. The slave pendulum was attached to the timekeeping mechanisms of the clock, leaving the master pendulum virtually free of external disturbances.".
- Shortt-Synchronome_clock thumbnail Shortt_Synchronome_free_pendulum_clock.jpg?width=300.
- Shortt-Synchronome_clock wikiPageExternalLink Shortt.htm.
- Shortt-Synchronome_clock wikiPageID "16071070".
- Shortt-Synchronome_clock wikiPageLength "16546".
- Shortt-Synchronome_clock wikiPageOutDegree "43".
- Shortt-Synchronome_clock wikiPageRevisionID "703725153".
- Shortt-Synchronome_clock wikiPageWikiLink Aerodynamic_drag.
- Shortt-Synchronome_clock wikiPageWikiLink Amplitude.
- Shortt-Synchronome_clock wikiPageWikiLink Atmospheric_pressure.
- Shortt-Synchronome_clock wikiPageWikiLink Atomic_clock.
- Shortt-Synchronome_clock wikiPageWikiLink Category:Clocks.
- Shortt-Synchronome_clock wikiPageWikiLink Electromagnet.
- Shortt-Synchronome_clock wikiPageWikiLink Electromechanics.
- Shortt-Synchronome_clock wikiPageWikiLink Escapement.
- Shortt-Synchronome_clock wikiPageWikiLink Feedback.
- Shortt-Synchronome_clock wikiPageWikiLink Frank_Hope-Jones.
- Shortt-Synchronome_clock wikiPageWikiLink Frequency.
- Shortt-Synchronome_clock wikiPageWikiLink Hertz.
- Shortt-Synchronome_clock wikiPageWikiLink Horology.
- Shortt-Synchronome_clock wikiPageWikiLink In-phase_and_quadrature_components.
- Shortt-Synchronome_clock wikiPageWikiLink Inch.
- Shortt-Synchronome_clock wikiPageWikiLink Invar.
- Shortt-Synchronome_clock wikiPageWikiLink Leaf_spring.
- Shortt-Synchronome_clock wikiPageWikiLink London.
- Shortt-Synchronome_clock wikiPageWikiLink Master_clock.
- Shortt-Synchronome_clock wikiPageWikiLink Microsecond.
- Shortt-Synchronome_clock wikiPageWikiLink Millimeter_of_mercury.
- Shortt-Synchronome_clock wikiPageWikiLink Observatory.
- Shortt-Synchronome_clock wikiPageWikiLink Pendulum.
- Shortt-Synchronome_clock wikiPageWikiLink Pendulum_clock.
- Shortt-Synchronome_clock wikiPageWikiLink Phase-locked_loop.
- Shortt-Synchronome_clock wikiPageWikiLink Primary_standard.
- Shortt-Synchronome_clock wikiPageWikiLink Q_factor.
- Shortt-Synchronome_clock wikiPageWikiLink Quartz_clock.
- Shortt-Synchronome_clock wikiPageWikiLink Ratchet_(device).
- Shortt-Synchronome_clock wikiPageWikiLink Remontoire.
- Shortt-Synchronome_clock wikiPageWikiLink Seconds_pendulum.
- Shortt-Synchronome_clock wikiPageWikiLink Thermal_expansion.
- Shortt-Synchronome_clock wikiPageWikiLink Time_signal.
- Shortt-Synchronome_clock wikiPageWikiLink United_States_Naval_Observatory.
- Shortt-Synchronome_clock wikiPageWikiLink Vacuum.
- Shortt-Synchronome_clock wikiPageWikiLink File:Precision_observatory_clock_(master_cylinder),_World_Museum_Liverpool.png.
- Shortt-Synchronome_clock wikiPageWikiLink File:Shortt_Synchronome_free_pendulum_clock.jpg.
- Shortt-Synchronome_clock wikiPageWikiLinkText "Shortt".
- Shortt-Synchronome_clock wikiPageWikiLinkText "Shortt-Synchronome clock".
- Shortt-Synchronome_clock wikiPageWikiLinkText "Shortt-Synchronome free pendulum clock".
- Shortt-Synchronome_clock wikiPageWikiLinkText "Synchronome system".
- Shortt-Synchronome_clock wikiPageWikiLinkText "Synchronome".
- Shortt-Synchronome_clock wikiPageWikiLinkText "William H. Shortt".
- Shortt-Synchronome_clock wikiPageWikiLinkText "free-pendulum clock".
- Shortt-Synchronome_clock wikiPageUsesTemplate Template:Cite_book.
- Shortt-Synchronome_clock wikiPageUsesTemplate Template:Reflist.
- Shortt-Synchronome_clock subject Category:Clocks.
- Shortt-Synchronome_clock hypernym Clock.
- Shortt-Synchronome_clock type HistoricPlace.
- Shortt-Synchronome_clock type Instrument.
- Shortt-Synchronome_clock type Instrument.
- Shortt-Synchronome_clock type Machine.
- Shortt-Synchronome_clock type Redirect.
- Shortt-Synchronome_clock comment "The Shortt-Synchronome free pendulum clock was a complex precision electromechanical pendulum clock invented in 1921 by British railway engineer William Hamilton Shortt in collaboration with horologist Frank Hope-Jones, and manufactured by the Synchronome Co., Ltd. of London, UK.".
- Shortt-Synchronome_clock label "Shortt-Synchronome clock".
- Shortt-Synchronome_clock sameAs Q7502244.
- Shortt-Synchronome_clock sameAs Category:Shortt-clock.
- Shortt-Synchronome_clock sameAs Shortt-Uhr.
- Shortt-Synchronome_clock sameAs Zegar_Shortta.
- Shortt-Synchronome_clock sameAs m.03qn8r9.
- Shortt-Synchronome_clock sameAs Часы_Шорта.
- Shortt-Synchronome_clock sameAs Q7502244.
- Shortt-Synchronome_clock wasDerivedFrom Shortt-Synchronome_clock?oldid=703725153.
- Shortt-Synchronome_clock depiction Shortt_Synchronome_free_pendulum_clock.jpg.
- Shortt-Synchronome_clock isPrimaryTopicOf Shortt-Synchronome_clock.