Pendulum clocks, This is How they work
Photo by Krow10
Pendulum clocks are admired today mostly for their antique and decorative value, but for several hundred years they were the most widely used and most accurate timepieces in the world.
The 16th century scientist Galileo
first realized that pendulums could keep accurate time, although the invention of the first pendulum clock is credited to the Dutch scientist Huygens
, in 1656.
All these clocks contain the same components and work in much the same way.
- The most important part is the pendulum itself, which is a weight attached to the end of a long rod, which swings due to gravity.
- A device called an escapement then transmits energy to the pendulum, causing it to swing in regular measured intervals, which in turn causes the hands of the clock to move – thus measuring time.
- A gear train (also called a wheel train) increases the speed of this power in order for the pendulum to use it.
- Some more elaborate clocks also use a device called a striking train to produce a chime every hour, or quarter hour.
- Some older clocks also contain a repeater, which plays the chimes when pressed – a useful device for telling the time in the dark.
One problem is that the length of a pendulum’s swing will vary as the temperature changes - during the 18th century, the grid pendulum was devised, which used the theory of differential expansion of steel and brass to ensure that the pendulum’s swing distance did not change.
More progress was made during the late 19th century as it was realized that a pendulum operating in a vacuum would be even more accurate.
For a simple device, the pendulum has been surprisingly useful over the years. Not only did it revolutionize the way we measure time; it has also been used to detect earth tremors
and to demonstrate the rotation of the earth.
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Heremelie movement Not rated yet
I have a Grandfather clock with a Hermelie movement probly from the 70's.
I can't slow it down. I have turn the nut on the pendulum as far as it will …
Kieninger mantle clock Not rated yet
I have this clock with the Kieninger symbol on it.
It is a pendulum type clock on the back it has the symbol then made in Germany and under that it says …
swing it Not rated yet
To keep that pendulum swinging you must balance the tick and the tock.
First, I levelled the clock left/right and front/back then I moved the pendulum …
Need help to get my pendulum swinging Not rated yet
I just bought an Emperor pendulum clock at a garage sale, brought it home, and the pendulum won't keep swinging!
What do I need to do?
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