[time-nuts] GPS disciplined mechanical clocks

Jim Palfreyman jim77742 at gmail.com
Mon Mar 9 20:35:43 EDT 2009


Excellent.

I shall get the observatory to move their hydrogen masers onto a board on
drink cans immediately.

Jim

2009/3/10 Max Robinson <max at maxsmusicplace.com>

> Hal Murray wrote.
>
> Sounds like good science fair bait.  Are there similar demos?  Can you get
> two tuning forks to beat if held next to each other but get in sync if
> their
> bases are touching?  (or something like that)
>
> Yes.  That's a standard sophomore physics demonstration.
>
> Regards.
>
> Max.  K 4 O D S.
>
> Email: max at maxsmusicplace.com
>
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> ----- Original Message -----
> From: "Hal Murray" <hmurray at megapathdsl.net>
> To: "Discussion of precise time and frequency measurement"
> <time-nuts at febo.com>
> Sent: Monday, March 09, 2009 2:27 AM
> Subject: Re: [time-nuts] GPS disciplined mechanical clocks
>
>
> >
> >> Allied to this discussion is the Loomis effect, discovered by the
> >> American millionaire who had three Shortt clocks running in his
> >> basement. They synchronised unless aligned at 120 degrees to each
> >> other. I wonder weather they were shaking the bedrock, or maybe the
> >> gravitational attraction between the 10 kg pendulums may have
> >> synchronised them.   (See "Tuxedo Park" by Jennet Conant) He qualified
> >> as the first time nut.
> >
> > It's on page 67-68.
> >
> > When I told that story to a friend today, he gave me one back.
> >
> > If you take 3 old fashioned mechanical metronomes and put them on a board
> > that is on a couple of soft drink cans for rollers, they will get in
> sync.
> > It may take an hour...
> >
> > Sounds like good science fair bait.  Are there similar demos?  Can you
> get
> > two tuning forks to beat if held next to each other but get in sync if
> > their
> > bases are touching?  (or something like that)
> >
> >
> > --
> > These are my opinions, not necessarily my employer's.  I hate spam.
> >
> >
> >
> >
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> >
> >
>
>
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