The object , that moves left and right

The pendulum clock was invented by Christiaan Huygens in 1656. He was Dutch and livedall his life in the Netherlands. Christiaan Huygens was born in Hague, Netherlands in April14, 1629. He died in Hague, Netherlands in July 8, 1695. Everyone credits him for makingthe clock.He went to school at Leiden University. He was a Dutch astronomer, physicist and mathematician. He was most famous for developing the wave theory of light. In his life he also described the shape of Saturn’s rings, discovered Titan and drew the first map of Mars. Galileo Galilei had the idea of the clock but Christiaan Huygens took it to a next level. Christiaan Huygens & The Pendulum Clock C.A. 1659                                Christiaan Huygens clock                                                                                             Source:                                                       source: http://www.dailymailBefore we understand the clock we have to talk about time.A lot of devices have been invented to measure time before but they are different to what you have now. Before people had clocks, they had to guess what time it is by looking at the sun.Over time loads of different types of clocks have been invented. For this essay I will only talk about the pendulum clock. A pendulum clock is a clock that uses a pendulum. A pendulum is a heavy object , that moves left and right and everytime it swings it make a “tick” sound.The good thing about it, it calculates exactly one second. On the bigger clock, so called “grandfather clocks”, one swing every two seconds. On a cucu clock the pendulum swings twice every second. How do they keep the pendulum ticking evenly?The smart thing about the clock is that is uses gravity as a force, which is endless and free. The clock does need winding up the weights to keep it going. There are 5 parts to the clock: the hour , the pendulum, the weights, the escapement, the gears. Huygens worked out, basing his ideas on Galileo’s ideas, how to use the weights to slowly lower and set in motion the gears and the escapement who regulate the swing motion of the pendulum. A negative thing about the pendulum clock was that it is very expensive and only the richest families could afford it. Also is it quite a huge piece of furniture that does not fit in every house. A lot of the pendulum clocks are nicely decorated with gold colour pendulums. Most of the weights are filled up with lead. After a day or a week, depending how the clock is made, you need to pull up manually the weights otherwise the clock will stop as the pendulum has no more motion. A fun and smaller version of the pendulum clock is the so called “cuckoo clock”, named after the cuckoo that pops out and calls the hour. The clocks are originally from the Black Forest area in Germany. We are not quite sure who really invented the cuckoo clock but the name of Franz Ketterer pops up as a possibility. The clocks  have detailed decoration of forest animals and forest. The carving is quite beautiful. The clock was hugely popular from the 1850’s onwards and is now back in fashion as a retro item. You cannot distinguish day and night by listening to the clock as both 8 am and pm are 8 “cuckoos”.  Loads of clocks were made and therefore they were affordable also fitted in most of the houses.One of the most famous clocks in the world is Big Ben clock in London, part of the Houses of Parliament. This clock is in an iron frame of 7 meters diameter , the hour hand is 2.7 m and the minute hand is 4.3 m. Big Ben is known for its accurate time keeping due to modified mechanism behind it. At the moment Big Ben is not working as they are restoring the clock and bell and it is out of order till 2020. However for New Years eve and Remembrance Day big Ben sounds.                               Big ben being cleaned                                                                                  cuckoo clock                                                                                                                                                                       Source:                                                       source:                                                                                                      Clocks have become more and more smaller and more high tech over time. But the base mechanism is still the same. The art and study of clocks is called horology. Collecting old clocks is very popular and specialist people are needed to repair them or maintain them.Resources used in researching and writing this passage Websites: Big Ben Wikipedia: do pendulum clocks work: Wikipedia: Kalle Blache Williams