There are three ancient clocks they are:-1.Sundail2.Hour glass3.Pendelum
sun dial,water clo ck,
the ancient egyptians.
Keeping time, in the days before mechanical clocks.
You turn the clocks back because the days get longer.
Yes, clocks use energy to operate. This energy can come from batteries, electricity, or mechanical mechanisms like springs. Digital clocks typically require electricity, while analog clocks may use batteries or winding mechanisms to function.
Any Encyclopedia will report that clocks were invented in ancient times, as sundials are primitive clocks. As for mechanical clocks, there are public clocks from the 14th which are still on display in the Science Museum in Britain. See http://www.sciencemuseum.org.uk/on-line/wells-clock/index.asp
silk road
Ctesibus was a Greek inventor who made water clocks with moving figures on them.
He didn't invent it, but improved on it. Clocks have been in use for thousands of years. The Chinese had a water clock and by the 1300's in Europe there were candles to measure time. The ancient Greeks and Egyptians had clocks as well.
Time and attendance clocks are used by employers to track the days and hours worked by employees. They can either be physical clocks which stamp the time, or electronic clocks which store times digitally.
they used it for illegal use