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Mar 7, 1300
Water Clock
The Greeks invented the water clock. They introduced several types of the inflow clepsydra, one of which included the earliest feedback control system. A water clock or clepsydra is any timepiece in which time is measured by the regulated flow of liquid into or out from a vessel where the amount is then measured. -
Jul 22, 1300
Hourglass
An houglass can also be another source to measure time and tell what time it is of the day. An hourglass is a invertible device with two connected glass bulbs containing sand that takes an hour to pass from the upper to the lower bulb. -
Pendulum Clock
The pendulum was invented by Christiaan Huygens. Galeio had a lot to do with this clock though it was not invented by him.From its examination in around 1602 by Galileo Galilei, the regular motion of pendulums was used for timekeeping, and was the world's most accurate timekeeping technology until the 1930s. Pendulums are used to regulate pendulum clocks, and are used in scientific instruments such as accelerometers and seismometers. -
Baloon Clock
A bollon clock can be another source to measure time. A balloon clock is a bracket clock with a waisted or balloon-shaped case. It was popular in England from the late 18th to the early 19th century. It is believed that balloon clock is derived from French styles that are usually of satinwood or mahogany with a convex or flat dial. -
Quartz Clock
A quartz clock is a clock that uses an electronic oscillator that is regulated by a quartz crystal to keep time. This crystal oscillator creates a signal with very precise frequency, so that quartz clocks are at least an order of magnitude more accurate than mechanical clocks. -
Candle Clock
Similar candles were used in Japan until the early 10th century. The candle clock most commonly mentioned and written of is attributed to King Alfred the Great. It consisted of six candles made from 72 pennyweights of wax, each 12 inches (30 cm) high, and of uniform thickness, marked every inch (2.54 cm). -
Sundial Clock
The Sundial was found in Egypt on March 20, 2013. The person who invented the Sundial is unknown.
