[permalink] [id link]
The pendulum clock was invented in 1656 by Dutch scientist Christiaan Huygens, and patented the following year.
from
Wikipedia
Some Related Sentences
pendulum and clock
While never reaching the level of accuracy of a modern timepiece, the water clock was the most accurate and commonly used timekeeping device for millennia, until it was replaced by the more accurate pendulum clock in 17th century Europe.
Examples include the mathematical models that describe the swinging of a clock pendulum, the flow of water in a pipe, and the number of fish each springtime in a lake.
Huygens ran trials using both a pendulum and a spiral balance spring clock as methods of determining longitude.
The English clockmaker Henry Sully had already invented a marine clock to determine longitude accurately, a sophisticated pendulum clock.
However Sully's clock only kept accurate time in calm weather as it depended on the stable motion of the pendulum.
File: Christiaan Huygens-painting. jpeg | Christiaan Huygens ( 1629-1695 ): studied the rings of Saturn and discovered its moon Titan, invented the pendulum clock, studied optics and centrifugal force, theorized that light consists of waves ( Huygens – Fresnel principle ) which became instrumental in the understanding of wave-particle duality.
A pendulum clock is a clock that uses a pendulum, a swinging weight, as its timekeeping element.
From its invention in 1656 by Christiaan Huygens until the 1930s, the pendulum clock was the world's most precise timekeeper, accounting for its widespread use.
Galileo had the idea for a pendulum clock in 1637, which was partly constructed by his son in 1649, but neither lived to finish it.
In 1670, London clockmaker William Clement added this seconds pendulum to the original pendulum clock of Christian Huygens.
This clock used an anchor escapement mechanism with a seconds pendulum to display seconds in a small subdial.
* December – The pendulum clock is invented by Christiaan Huygens.
The 17th-century Dutch mathematician Christiaan Huygens discovered and proved these properties of the cycloid while searching for more accurate pendulum clock designs to be used in navigation.
His work included early telescopic studies elucidating the nature of the rings of Saturn and the discovery of its moon Titan, the invention of the pendulum clock and other investigations in timekeeping, and studies of both optics and the centrifugal force.
Spring driven pendulum clock, designed by Huygens, built by instrument maker Salomon Coster ( 1657 ), and manuscript Horologium Oscillatorium, Museum Boerhaave, Leiden
His invention of the pendulum clock, patented in 1657, was a breakthrough in timekeeping.
The oldest known Huygens style pendulum clock is dated 1657 and can be seen at the Museum Boerhaave in Leiden which also shows an important astronomical clock owned and used by Huygens.
pendulum and was
-- An extensive series of measurements was made on a high-density polyethylene in a torsion pendulum instrument using forced sinusoidal oscillation, free vibration, and creep measurements over the temperature range of Af to 80-degrees-C.
By 1975 the pendulum had swung back, and agrarian reform was all but halted.
The grid-iron pendulum was developed during this phase.
He was a man of many skills and used these to systematically improve the performance of pendulum clocks.
His goal was to achieve a definition based on astronomical constants, using a pendulum.
The development of the armoured tank and improved infantry tactics at the end of World War I swung the pendulum back in favour of maneuver, and with the advent of Blitzkrieg in 1939, the end of traditional siege warfare was at hand.
It was a mechanism consisting of a hydrostatic valve and pendulum that caused the torpedo's hydroplanes to be adjusted so as to maintain a preset depth.
Huygens was the first to derive the formula for the period of an ideal mathematical pendulum ( with massless rod or cord and length much longer than it's swing ), in modern notation:
One of the earliest known uses of a pendulum was in the 1st.
Many sources claim that the 10th century Egyptian astronomer Ibn Yunus used a pendulum for time measurement, but this was an error that originated in 1684 with the British historian Edward Bernard.
The pendulum was the first harmonic oscillator used by man.
Robert Hooke was also responsible for suggesting as early as 1666 that the pendulum could be used to measure the force of gravity.
During his expedition to Cayenne, French Guiana in 1671, Jean Richer found that a pendulum clock was minutes per day slower at Cayenne than at Paris.
This confirmed the earlier observation by Marin Mersenne that the period of a pendulum does vary with its amplitude, and that Galileo's observation of isochronism was accurate only for small swings .< ref >
In 1816 he was secretary of a commission charged with ascertaining the precise length of the second's or seconds pendulum ( the length of a pendulum whose period is exactly 2 seconds ), and in 1818 he became secretary to the Board of Longitude and superintendent of the HM Nautical Almanac Office.
The original sphere from the pendulum was temporarily displayed at the Panthéon in the 1990s ( starting in 1995 ) during renovations at the Musée des Arts et Métiers.
The original pendulum was later returned to the Musée des Arts et Métiers, and a copy is now displayed at the Panthéon.
While it had long been known that the Earth rotated, the introduction of the Foucault pendulum in 1851 was the first simple proof of the rotation in an easy-to-see experiment.
pendulum and invented
He invented the gridiron pendulum, consisting of alternating brass and iron rods assembled so that the different expansions and contractions cancel each other out.
A physician friend invented a device which measured a patient's pulse by the length of a pendulum ; the pulsilogium.
A Kater's pendulum is a reversible freeswinging pendulum invented by British physicist and army captain Henry Kater in 1817 for use as a gravimeter instrument to measure the local acceleration of gravity.
The gridiron pendulum was an improved clock pendulum invented by British clockmaker John Harrison around 1726.
He invented the pendulum clock, which was a major step forward towards exact timekeeping.
He also was first to propose using a reversible pendulum to measure gravity, which was independently invented in 1817 by Henry Kater and became known as the Kater's pendulum.
The clepsydra kept more accurate time than any clock invented until the Dutch physicist Christiaan Huygens detailed the use of a pendulum to regulate a clock in the 17th century.
The torsion balance, also called torsion pendulum, is a scientific apparatus for measuring very weak forces, usually credited to Charles-Augustin de Coulomb, who invented it in 1777, but independently invented by John Michell sometime before 1783.
The grasshopper escapement is an unusual, low-friction escapement for pendulum clocks invented by British clockmaker John Harrison around 1722.
In the 20th century William Hamilton Shortt invented a free pendulum clock, patented in September 1921 and manufactured by the Synchronome Company, with an accuracy of one hundredth of a second a day.
In 1673, 17 years after he invented the pendulum clock, Christiaan Huygens published his mathematical analysis of pendulums, Horologium Oscillatorium.
The verge was only used briefly in pendulum clocks before it was replaced by the anchor escapement, invented around 1660 and widely used beginning in 1680.
Originally the movement had a verge escapement with a foliot, as it was built 127 years before the pendulum clock was invented.
The pendulum clock with an anchor escapement, invented in 1670, was sufficiently independent of drive force so that only a few had fusees.
0.327 seconds.