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The first obelisk was created in 3500 B.C. and is among the shadow clock. The sundial dates back around 1500 B.C. and have their orgin in shadow clocks.
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This was a prototype of our modern alarm clock created by the Greeks. The "water clock" ,also called a clepsydrae , was where raising waters would both keep time and eventually hit a mechanical bird that triggered an alarming whistle. These were much more useful than sundials, because they could be use indoors and outdoors.
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The earliest medieval European clockmakers were Christian monks. The first recorded clock was built by the future Pope Sylvester II.
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In 1504, the first portable watch was created by Peter Henlein. in Nuremburg, Germany. The first reported person to actually wear a watch on the wrist was the French mathematician and philosopher, Blaise Pascal.
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The first mechanical alarm clock was invented by American Levi Hutchins of Concord, New Hampshire, in 1787. It could only ring at 4 A.M. In 1876, a mechanical wind-up alarm clock that could ring at any time, was patened by Seth E. Collins.
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Standard time is the synchronization of clocks within a geographical area to a single time. Sir Sanford Fleming invented standard time in 1878.
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The Warren Clock Company was formed in 1912. Soon they produced a new type of clock run by batteries, before, clocks were either wound or run by weights.
