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Does the pendulum have anything to do with keeping time ?

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They were all important once, until about 1930, but are no longer used for precise timekeeping, just decoration.

The property of a pendulum which made it so is that, for a frictionless pivot and a massless rod with a relatively massive bob on the end, the swing period depends only on the length of the pendulum. Thus designs focussed on those factors.

In practice even the expansion of metal parts due to the heat of the day caused errors, and they could not be used in vehicles or boats. The search went on.

Posted on Dec 02, 2016


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What causes the pendulum to seems out of balance?

try moving the whole clock one side or another so the pendulum runs better

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Re: Galleria / Metro Grandfather Clocck. W/ pendulum on lower hanger clock runs slow. W/ pendulum on upper hanger clock runs fast. How can I adjust so it will keep correct time, or should I take it to a...

Most grandfather/grandmother clocks have an adjustable screw on the weight to slightly extend it or shorten it to satisfy the equation of pendulum swing. the shorter the swing (arc distance) the faster the clock, the longer the swing the longer the time. Check to see if you can adjust the weight up or down on the hanger.

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My wall clock runs about 10 min utes fast per 24 hours. I has a pendulum with an ajustable screw at the bottom. Can I turn this screw to adjust the running time. If so, which way (shorten or lengthen)?

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Do it bit-by-bit unscrewing the screw thus lowering the bob. Observe time keeping day-by-day and eventually you will reach the right length of the pendulum for precise timekeeping.

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Aug 21, 2009 | Watches

1 Answer

What ports wind what?

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I inherited a grandfather clock which runs slow

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