[time-nuts] World's most precise.... wall clock

[Edesio Costa e Silva]

Hi!

I found a copy at <https://www.g8wrb.co.uk/useful-stuff/time/pdf/pendulum+quartz.pdf>

Edésio

On Tue, Mar 02, 2021 at 10:42:45PM -0800, Hal Murray wrote:
> > Maybe one day I'll make this work with a grandfather clock.
>
> Many years ago, Scientific American had an article describing adding a magnet
> to the pendulum and the circuitry to drive it.
>
> The basic idea is to mount a magnet on a stiff wire so that it sticks out to
> the side of the pendulum arm, then mount a coil so the magnet will swing
> through it.  Now pulse the coil to get the desired results.
>
> Scientific American, September 1974, Amateur Scientist
> A venerable clock is made highly accurate by equipping it with quartz-crystal works
>
> They want $8 for a pdf.
> https://www.scientificamerican.com/article/the-amateur-scientist-1974-09/
>
>
> --
> These are my opinions.  I hate spam.
>
>
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at lists.febo.com
> To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
> and follow the instructions there.