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the defects in the art of clocks. But because his being deprived of sight prevented him making drawings and models to the desired effect, and his son
Vincenzio came one day from Florence to Arcetri, Galileo told him his idea and several discussions followed. Finally, they decided on the scheme shown in the accompanying drawing, to be put in practice to learn the fact of those difficulties in machines which are usually not foreseen in simple theorizing.
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One day in 1641, while I was living with him at his villa in
Arcetri, I remember that the idea occurred to him that the pendulum could be adapted to clocks with weights or springs, serving in place of the usual tempo, he hoped that the very even and natural motions of the pendulum would correct all
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of swing is the same for different size swings. He realized that this property made the pendulum useful for timekeeping. He also discovered that the pendulum's period is dependent on its length, but independent of the mass of the pendulum bob. He used free-swinging pendulums as timers in scientific
103:, thus allowing it to be applied to clocks. Since he was by then totally blind, he described the mechanism to his son Vincenzio, who drew a picture from his description. Galileo's student and biographer,
63:(1564–1642). Galileo was one of the leading minds of the Scientific Revolution. He was dubbed the founder of theoretical physics. He is also credited with the invention of the
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His son
Vincenzio began building a clock, but both he and Galileo died before it was completed. The first pendulum clock was built in 1657 by
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75:, who drew a sketch of it. The son began construction of a prototype, but both he and Galileo died before it was completed.
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using a different design. The pendulum clock remained the world's most accurate timekeeper for 300 years, until the 1930s.
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In 1637, when he was 73, Galileo had the idea of a mechanism that would keep the pendulum swinging by giving it pushes, an
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67:(a type of telescope) and the geometric and military compass. Galileo's escapement was the earliest design of a
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Original drawing from around 1637 of the pendulum clock designed by
Galileo, incorporating the escapement.
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Since his time, various working models of
Galileo's clock have been built
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71:. Since Galileo was by then blind, he described the device to his son
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Galileo's
Daughter: A Historical Memoir of Science, Faith, and Love
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Galileo was the first to investigate the timekeeping properties of
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156:"Galileo and the Scientific Revolution of the Seventeenth Century"
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206:Transactions of the American Philosophical Society
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116:The existing clocks of the time, which used the
417:Dialogue Concerning the Two Chief World Systems
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96:experiments and for keeping time for music.
59:, invented around 1637 by Italian scientist
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179:"Galileo: a New Science and a New Spirit"
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387:Letter to the Grand Duchess Christina
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177:Cassirer, Ernst (Winter 1942–43).
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323:Leaning Tower of Pisa experiment
202:"The Invention of the Telescope"
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154:Koyre, Alexandre (July 1943).
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660:Inventions by Galileo Galilei
379:Letter to Benedetto Castelli
107:, describes the invention:
226:Van Helden, Albert (1995).
200:Van Helden, Albert (1977).
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552:Galileo National Telescope
212:(4): 20 – via JSTOR.
189:(1): 17 – via JSTOR.
516:Galileo's objective lens
166:: 333 – via JSTOR.
160:The Philosophical Review
55:is a design for a clock
547:Galileo Galilei Airport
318:Galilean transformation
293:Observational astronomy
46:Model of the escapement
394:Discourse on the Tides
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558:Astronomers Monument
511:Galileo's telescopes
449:Michelagnolo Galilei
303:Galileo's escapement
183:The American Scholar
136:(see picture at top)
53:Galileo's escapement
528:Galileo thermometer
401:Discourse on Comets
371:Letters on Sunspots
308:Galilean invariance
232:The Galileo Project
568:In popular culture
523:Tribune of Galileo
355:De motu antiquiora
129:Christiaan Huygens
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496:Galileo's paradox
491:Villa Il Gioiello
286:Scientific career
234:. Rice University
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608:Starry Messenger
584:Lamp At Midnight
485:And yet it moves
443:Vincenzo Galilei
425:Two New Sciences
363:Sidereus Nuncius
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228:"Pendulum Clock"
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236:. Retrieved
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655:Escapements
618:(1999 book)
610:(1996 book)
602:(1975 film)
594:(1968 film)
586:(1947 play)
578:(1943 play)
409:The Assayer
358:(1589–1592)
338:Thermoscope
89:isochronous
649:Categories
540:spacecraft
469:(mistress)
463:(daughter)
238:2010-11-18
142:References
101:escapement
57:escapement
451:(brother)
85:pendulums
73:Vincenzio
445:(father)
396:" (1616)
389:" (1615)
333:Celatone
79:Overview
65:celatone
600:Galileo
592:Galileo
477:Related
44:(right)
501:Sector
436:Family
428:(1638)
420:(1632)
412:(1623)
404:(1619)
382:(1613)
374:(1613)
366:(1610)
93:period
91:: its
40:(left)
457:(son)
347:Works
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218:^
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271:e
264:t
257:v
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
