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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
87:, beginning around 1603. His interest was sparked by his discovery that, at least for small swings, the pendulum is
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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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Koyre, Alexandre (July 1943). "Galileo and the
Scientific Revolution of the Seventeenth Century".
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Cassirer, Ernst (Winter 1942–43). "Galileo: a New
Science and a New Spirit".
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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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Van Helden, Albert (1977). "The
Invention of the Telescope".
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116:The existing clocks of the time, which used the
429: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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399:Letter to the Grand Duchess Christina
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335:Leaning Tower of Pisa experiment
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672:Inventions by Galileo Galilei
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391:Letter to Benedetto Castelli
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238:Van Helden, Albert (1995).
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10:
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564:Galileo National Telescope
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528:Galileo's objective lens
156:The Philosophical Review
55:is a design for a clock
559:Galileo Galilei Airport
330:Galilean transformation
305:Observational astronomy
46:Model of the escapement
406:Discourse on the Tides
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570:Astronomers Monument
523:Galileo's telescopes
461:Michelagnolo Galilei
315:Galileo's escapement
183:The American Scholar
136:(see picture at top)
53:Galileo's escapement
540:Galileo thermometer
413:Discourse on Comets
383:Letters on Sunspots
320:Galilean invariance
244:The Galileo Project
580:In popular culture
535:Tribune of Galileo
367:De motu antiquiora
129:Christiaan Huygens
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508:Galileo's paradox
503:Villa Il Gioiello
298:Scientific career
246:. Rice University
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620:Starry Messenger
596:Lamp At Midnight
497:And yet it moves
455:Vincenzo Galilei
437:Two New Sciences
375:Sidereus Nuncius
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240:"Pendulum Clock"
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69:pendulum clock
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248:. Retrieved
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667:Escapements
630:(1999 book)
622:(1996 book)
614:(1975 film)
606:(1968 film)
598:(1947 play)
590:(1943 play)
421:The Assayer
370:(1589–1592)
350:Thermoscope
89:isochronous
661:Categories
552:spacecraft
481:(mistress)
475:(daughter)
250:2010-11-18
142:References
101:escapement
57:escapement
463:(brother)
216:(4): 20.
189:(1): 17.
85:pendulums
73:Vincenzio
457:(father)
408:" (1616)
401:" (1615)
345:Celatone
195:41203634
79:Overview
65:celatone
612:Galileo
604:Galileo
489:Related
222:1006276
168:2180668
162:: 333.
44:(right)
513:Sector
448:Family
440:(1638)
432:(1632)
424:(1623)
416:(1619)
394:(1613)
386:(1613)
378:(1610)
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93:period
91:: its
40:(left)
469:(son)
359:Works
218:JSTOR
191:JSTOR
164:JSTOR
663::
242:.
230:^
214:67
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187:12
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160:52
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283:e
276:t
269:v
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170:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
