my grandfather clock is striking one hour slow what can i do?

Answer 1

I think that you should put it on a rocketship - and accellerate it out into space for three years at .999C - then, when it returns, it will have slowed down an hour.

Either that or place it near a black hole until it reads correctly, then remove it quickly.

Or reset the hands???

Answer 2

Grandfather Clock Chimes

Answer 3

Move the hour hand forward.

If it is a weight mechanism rather than a spring mechanism, you can take the weight that propels the striking mechanism off of it's chain and advance the clock 1 hour by advancing the minute hand. Do this at a time when the bell is not due to ring. (Some grandfather clocks strike every 15 minutes.)
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Answer 4

Well, on mine I would just move the HOUR hand back 1 hour to match the striking - it's on a friction clutch so it will move back if you push gently. Then advance the clock 1 hour to get back to the right time by moving the MINUTE hand clockwise a complete circle.

Congratulations if you have an antique grandfather (more correctly, long-case) clock - very valuable these days.

Answer 5

You can correct this problem most easily by setting the clock (moving the hands forward, never backward) to a time just before it strikes twelve, then stopping the pendulum when the clock actaully does start striking. Remove the hands and put them back on, positioning them at 12 o'clock. Finally, reset the clock to the correct time, moving the hands forward only. You can prevent a recurrence of the problem by always turning the clock forward when setting it; never backward.

Answer 6

It will be right in a couple of months time when the clocks go back an hour! Or do you mean that it is showing, say 6 o'clock and only striking 5 times? Maybe the striking mechanism needs cleaning and lubricating if so?

Answer 7

If the clock is always the same amount of time late, you just need to set the hands to the correct time and the clock will remain correct thereafter. You may have just forgotten to set the clock one hour ahead for Daylight Savings Time back in March.

If the clock is actually losing time, you need to shorten the pendulum. Each swing of the pendulum is supposed to be one second. But the period of a pendulum is directly proportional to the square root of its length, so too long a pendulum would take too long to swing, causing "seconds" that are too long and resulting in the clock gradually losing time.

Answer 8

Cheek of it all's answer seems at odds with my understanding of pendula. In the same way that Galileo's experiment showed that all things, no matter what they weigh, fall at the same speed (neglecting air resistance) , any pendulum will swing at a rate determined by the length, not the weight
What you need to do is sell the clock to someone in the next time zone.

Answer 9

Swing time as I have been informed does not rely on the length of the pendulum but the weight on the end of it.

That is why you see clocks of all sizes with all sorts of weights on the pendulum.

I saw a demonstration of this at college in a physics lesson and I was amazed by the fact that the swing time remains constant and is dependent on the weight being swung.

Answer 10

The hands need to be re-positioned. Pulled off and pushed back on again in a new position. The operation is very difficult to do without damaging the hands. Been there, done that.

Answer 11

When my clock did that I just turned the minute hand backward one hour.Some clocks are very delicate,so you should wait for a profession to answer.