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 <[email protected]> wrote: > Philip Gladstone <[email protected]> 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 <[email protected]> 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. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
