Wristwatch/Timelines: Difference between revisions
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imported>Robert W King mNo edit summary |
imported>Meg Taylor m (spelling: theives -> thieves) |
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{{timeline | {{timeline | ||
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|event= '''500 - 100 BC(E)''': | |event= '''500 - 100 BC(E)''': | ||
* Romans and the Greeks improve water clocks through mechanics (bells, gongs, doors -- ways to attempt flow regulation) | * Romans and the Greeks improve water clocks through mechanics (bells, gongs, doors -- ways to attempt flow regulation) | ||
* '''325 BC(E)''' - ''clepsydras' '' ("water | * '''325 BC(E)''' - ''clepsydras' '' ("water thieves") are used by the Greeks | ||
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{{TLevent | {{TLevent | ||
|event= '''1969''': Seiko Japan sells the 35SQ Astron, the first commercially available quartz watch on Christmas, December | |event= '''1969''': Seiko Japan sells the 35SQ Astron, the first commercially available quartz watch on Christmas, December 25th | ||
|width=550px | |width=550px | ||
|color=#FFF | |color=#FFF |
Latest revision as of 18:17, 14 February 2010
3500 BC(E): The obelisk is created by Egyptians, and possibly previously by Sumerians
1500 BC(E):
500 - 100 BC(E):
30 BC(E): Vitruvius describes 13 different types of sundial styles in Greece, Asia Minor, and Italy[1]
1 BC(E): Andronikos constructs the Horologion, the "Tower of the Winds" in Macedonia, Athens Marketplace
200 - 1300 CE(AD):
1300 CE(AD): Mechanical clocks appear in Italian cities, in towers.
1500 - 1510: Peter Henlein of Nuremberg invents the spring-powered clock.
1525:
1582: Galileo creates the pendulum-clock concept, but wasn't able to build it before his death.
1656: Christiaan Huygens (Dutch) invents the hair-spring, about the same time as Hooke from England
1671: William Clement of London begins to build clocks with an "anchor" or "recoil" escapement
1675: Huygens creates the Balance Wheel and spring assembly
1704: Nicholas Facio (Swiss) introduced Jeweled bearings
1721: George Graham creates a pendulum that adjusts for temperature change
1761:
1764: John Harrison builds the Gridiron pendulum
1880: Pierre Curie of France discovers piezoelectricity
1888: Friedrich Reinitzer of Austria discovers the liquid crystal property
1889:
1895: Seiko in Japan creates the first Japanese pocketwatch
1898: R. J. Rudd develops the first true "free pendulum clock"
1913: Seiko in Japan creates the first Japanese wristwatch, dubbed "The Laurel"
1921: W. H. Shortt develops another true "free pendulum clock"
1923:
1927: Warren Marrison develops the first quartz crystal oscillator clock
1940: The Swiss establish the Laboratoire Suisse de Recherches Horologeres (LSRH)
1946: The Hamilton Watch company develops the "Hamilton Electric 500" between 1946 and 1957. It is an abysmal market failure due to a flawed design, and short battery life.
1955: Max Hetzel of Switzerland creates prototypes of watches using Tuning Forks as opposed to the balance wheel.
1961: Seiko Japan creates the 951, their first quartz crystal chronometer
1962: The Swiss establish the Centre Electronique Horloger (CEH)
1967:
1968: Juergen Staudte creates a process for mass production of quartz oscillators while working at North American Avionics (which became Rockwell)
1969: Seiko Japan sells the 35SQ Astron, the first commercially available quartz watch on Christmas, December 25th
1970:
1972: The Pulsar is on the Market
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- ↑ Earliest Clocks. National Instute of Standards and Technology (NIST). Retrieved on 2008-01-29.