[time-nuts] Antique pendulum clocks

[Philip Gladstone]

Thanks for these links. The Harrison clocks are amazing -- I saw them at
Greenwich some years ago. The Trinity reference also amuses me as that was
my college (quite a long time ago).

Back in the 60s, my father and his cousin were competing to produce
accurate pendulum clocks with accuracies of the order of a fraction of a
second per day. Invar pendulums, temperature and pressure compensation and
temperature controlled environments. Electromagnetic pulse drive. All built
with transistors... I wish that I could talk to them now....

Philip

On Fri, Nov 22, 2019 at 9:30 AM Tony Finch <dot at dotat.at> wrote:

> Philip Gladstone <pjsg-timenuts at nospam.gladstonefamily.net> wrote:
> >
> > The data that I get is surprising in that the pendulum swing varies
> > according to the position of the hands on the clock.
>
> Clocks with large outdoor faces have extra problems along those lines...
>
> http://trin-hosts.trin.cam.ac.uk/clock/main.php?menu_option=pigeons
>
> Tony.
> --
> f.anthony.n.finch  <dot at dotat.at>  http://dotat.at/
> Sole, Lundy, Fastnet: Variable 4 or less, becoming north or northwest 4 to
> 6,
> occasionally 7 in Sole. Slight or moderate, occasionally rough in Sole.
> Rain
> or showers. Good, occasionally poor.
>
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