[time-nuts] Grandfather clock sync'd to 1PPS (from time-nuts Digest, Vol 200, Issue 4)

[Philip Gladstone]

I had a design for something like that which I could hang on the back of a
pendulum and screw a weight up and down (actually I was going to move the
whole device up and down). The problem was that it would impose significant
air resistance and actually prevent the clock from running. I believe that
8-day clocks consume a significant (most?) of their energy in air
resistance on the pendulum and hence the shape of the bob is actually quite
important.

I also wonder whether you could do something at the suspension point -- but
it is difficult to see how to do something that wouldn't impair the
integrity of the existing mechanism....

Philip

On Wed, Mar 10, 2021 at 5:20 PM Joseph B. Fitzgerald <
jfitzgerald at alum.wpi.edu> wrote:

>
>
> You guys have me thinking about another "non cheating" technique.    I am
> now imagining a small gear motor/screw arrangement that raises or lowers a
> mass on the pendulum to trim out small variations in swing frequency.
>
> -Joe Fitzgerald
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