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In addition to his mathematical and mechanical works, Huygens made important scientific discoveries: he was the first to identify Titan as one of Saturn's moons in 1655, invented the pendulum clock in 1657, and explained Saturn's strange appearance as due to a ring in 1659; all these discoveries brought him fame across Europe. [17]
Horologium Oscillatorium: Sive de Motu Pendulorum ad Horologia Aptato Demonstrationes Geometricae (English: The Pendulum Clock: or Geometrical Demonstrations Concerning the Motion of Pendula as Applied to Clocks) is a book published by Dutch mathematician and physicist Christiaan Huygens in 1673 and his major work on pendula and horology.
Before the invention of the pendulum clock, timepieces were accurate to only within ten to fifteen minutes a day. The use of the pendulum made for near frictionless time keeping, ensuring that the mechanism lost measurement of only a few seconds a day: a sixty-fold improvement. It was termed a "horological breakthrough".
The most accurate experimental pendulum clock ever made [22] [23] may be the Littlemore Clock built by Edward T. Hall in the 1990s [24] (donated in 2003 to the National Watch and Clock Museum, Columbia, Pennsylvania, USA). The largest pendulum clocks, exceeding 30 m (98 ft), were built in Geneva (1972) and Gdańsk (2016). [25] [26]
In a verge pendulum clock (see picture) which appeared after the pendulum was invented in 1656, the escapement was turned 90° so the verge rod was horizontal, while the escape wheel's axis was vertical, located under the verge rod. In the first pendulum clocks the pendulum was attached to the end of the verge rod instead of the balance wheel ...
This type of mechanism shows only solar (sundial) time. Clocks using it cannot easily be made to show mean time unless a separate clock mechanism, with its own pendulum, is included. There are some equation clocks in which this is done, but it requires the clock case to be very sturdy, to avoid coupling between the pendula. Another disadvantage ...
The Mavericks and Warriors combined to set a record for most made 3s in a game on Sunday. ... You were playing deeper into the 24-shot clock.” ... and it feels like the pendulum has swung a bit ...
The most accurate pendulum clocks were controlled electrically. [166] The Shortt–Synchronome clock, an electrical driven pendulum clock designed in 1921, was the first clock to be a more accurate timekeeper than the Earth itself. [167] A succession of innovations and discoveries led to the invention of the modern quartz timer.