project ( part 1+2+3)

History of clocks

The time is very important nowadays for our life, and if we will go back for the history of clocks and how people know about them and when they use them you will be surprised about the valuable information.

Originaly, the sun was the main thing to show the time by putting a vertical stick in the ground. The sun was moving from rising until sunset so the shadow of the stick was showing the line on the ground and the people were know the time. So the shadow of the stick was stopping in twelve steps from sun rising until sunset and by people’s calculation they divided the day in to two parts then they discovered the time.

The Egyptians improved on the stick shadow and they were the first people who used the sundial from about 800 BC. But they had some difficulty to measure the time by the sun because of the weather changes in the season.

Then the British were putting the sand in a bottle of glass with a small space to move the sand from the first bottle to the second bottle as they had difficulty because of the weather.

Reference:

http://www.historyworld.net/wrldhis/plaintexthistories.asp?historyid=ac08

 

How have clocks changed over the years?

Between 1629 and 1695 Christian Huygens was the first person who developed the pendulum-driven clock. Then people tried to improve it up to the beginning of the 18^th century when John Harrison started to improve the first pendulum clock. He used two different metals to build a pendulum as the best metals were bronze and steel. The two metals responded differently to cold and heat and thereby overcame the negative effect of heat and cold on the pendulum's length that resulted in the clock either loosing or gaining time.

Over time some people tried to improve the clocks by inventing the hand clocks; Abraham Louis Breguet put the formula to invent the first clock after the improvement at the beginning of the 19^thcentury.

The production of clocks began in the United States after the American War of Independence and made it possible for most families to pay for the clock. The electric clock was an American innovation of the early 20^th century invented by Henry E. Warren and was followed by the quartz clock invention in 1929.

My reference is:-

http://wiki.answers.com/Q/How_have_clocks_changed_over_the_years

Ali Al Hammadi - H00084165 - CLT

Present time

Nowadays, the clocks are very important for all the people in the world to know the timing for the days. Christian Huygens was the first person was developed the pendulum-driven clock in the 17^thcentury. After that a lot of changes happened to improve and develop the watches.

By today there are more than a hundred companies who are trying to develop the clocks by doing a lot of designs and colors. Before people had the clocks in their homes then the men were wearing pocket watches and it was very famous in America. Then they changed the way by wearing the watches on their wrists and the target people were men, women and the children.

Over time, the companies made a lot of different changes in the watches to attract people by adding a lot of features including the dates and digital numbers. Also they are changing the sizes for the watches to be smaller and lighter.

My references are:-

1- http://www.present-time-clocks.com/about-present-time/

2- http://www.localhistories.org/clocks.html

Ali Al Hammadi - H00084165 - CLT