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100
The Sun Dial
http://www-istp.gsfc.nasa.gov/stargaze/Sundial.htm The sun dial was the very first device mankind used to tell time. The Egyptians were the first to create and use this device. They invented it at about 100 AD. The sun dial worked by creating a shadow from the sun that was used to line up with a line written with a certain time of day. -
Period: 100 to
The Age of The Sundial
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Period: 100 to
The Life Span of Time Telling
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520
The Candle Clock
http://suite101.com/article/candle-clocks-a99480 Invented by the Chinese in 520 AD, a candle clock works by having either a wax candle or a stick of incense starting at a certain height and melts to a lower height. This tells how long it has been since it has been lit by measuring its height. These there are examples of how people used a frame, like in the picture, to measure the height of the candle, or they would have the height written in the wax. -
Period: 520 to Jan 1, 1285
The Age of the Candle Clock
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Jan 1, 1285
The Weight Clock
http://www.timekeepingsite.org/clock.htm Invented in Europe, the weight clock was the first mechanical clock ever created. It invovled having weights to use the force of gravity to help turn gears in the clock. The first public one appeared around 1335 A.D. in Milan, Italy. -
Period: Jan 1, 1285 to Jan 1, 1510
The Age of the Weight Clock
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Jan 1, 1510
The Spring-Driven Clock
http://www.elytradesign.com/ari/html/springdrivenclock.htm The spring-driven clock, built in 1510, was the first successful mechanical clock. It was originally constructed by Peter Henlein, a German engineer. This was also the first portable clock, and it later turned into the first watch by having a piece of string tied around the wrist. -
Period: Jan 1, 1510 to
The Age of the Spring-Driven Clock
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The Cukoo Clock
http://www.cuckooclockworld.com/history.htm The cuckoo clock was invented by Mr Franz Kettler in Germany in 1630. It was the first mechanical clock that could display time and create a sound at a certain time. Today, these clocks are very valuable and cost thousands of dollars. -
Period: to
The Age of the Cukoo Clock
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The Quartz Clock
http://www.elytradesign.com/ari/html/quartzclock.htm The quartz clock, invented by Warren A Marrison in 1927, is the type of analog clock used in the modern age. It works by having a battery to send electric currents through a coil to cause a vibration. The quartz clock is also the most common type of clock used for time keeping. -
Period: to
The Age of the Quartz Clock
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The Atomic Clock
http://www.sciencemuseum.org.uk/onlinestuff/stories/atomic_clocks.aspx The atomic clock was invented in England from the production of many scientists in 1949. It was a type of clock that used electromagnetic waves to track the time unlike the standard analog clock. It is far too dangerous to use in public due to its radiation, but it is still used for science and business due to how accurate it is. -
The Water Clock
http://inventors.about.com/library/weekly/aa071401a.htm Invented by the Persians in 328 AD, the water clock is a type of device that involves water pouring into or out of a bowl through a small hole constantly. The time the water constantly travels is then measured to be put into time. The most common type of water clock was having the water of in one bowl empty out into something that would catch the water. -
Period: to 520
The Age of the Water Clock
