Well-run pendulum clocks in the 1660s differed by only about 15 seconds a day. Non-pendulum clocks of the same era (ones that used rotating wheels) varied by about 15 minutes a day.
His work in this direction was motivated by his interest in light and in the design of pendulum clock.
This alarm mechanism fit for kinds of ordinary mechanical pendulum clock movements.
It was discovered that pendulum clocks recorded time differently depending on their location.
At present , the jiawei designs and produces all kinds of cassette mechanism of quartz clock , including cassette mechanism of alarm clock , stopwatch and pendulum clock.
Will no longer feel that life is too monotonous and old-fashioned as if the old house back and forth of that only know how to swing the pendulum clock units.