[time-nuts] A different timenuts interest

J. Forster jfor at quik.com
Thu Jul 22 13:34:22 EDT 2010


How about putting a high voltage, high frequency on the bob and wire, so
any body part that gets within say 2 feet draws giant arcs? :<))

-John

===============


> Well, I thought it was interesting that a barrier was needed at least
> 3 feet away from the swing so that people would not grab the cable.
>
> Can you imagine the effect of grabbing the cable with a 250 pound bob
> attached?
>
> I'd build one called "Evolution in Action." Put a Poe-like blade on
> the bottom of the ball and omit the railing. That is, if I had the
> money, ah, and the building. And my own country, where allowing idiots
> to breed was illegal.
>
> Bill Hawkins
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Bob Camp
> Sent: Thursday, July 22, 2010 11:53 AM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] A different timenuts interest
>
> Hi
>
> At > $30K certainly not cheap. My guess is that the building modifications
> and permits will set you back a pretty significant chunk of money as well.
>
> The issue of troubleshooting a 6 story high machine in a public space
> (plus
> insurance issues) likely makes the "proven design" a much better decision
> than a one off.
>
> Bob
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Brooke Clarke
> Sent: Thursday, July 22, 2010 10:38 AM
> To: Discussion of precise time and frequency measurement
> Cc: Morris Odell
> Subject: Re: [time-nuts] A different timenuts interest
>
> Hi Morris:
>
> See:
> http://www.calacademy.org/products/pendulum/pendulum_sales.html
> http://www.calacademy.org/products/pendulum/pendspec.pdf
> they are not cheap, but a proven design and probably lower in cost than
> making  just one of them.
>
> One of these was working at Foothill College in Los Altos Hills,
> California when I was there.  It was outside in a combined pit and
> tower, but is not longer in use.  It needs to be somewhere inside where
> vandals can not get to it.
>
> Have Fun,
>
> Brooke Clarke
> http://www.PRC68.com
>
>
> Morris Odell wrote:
>> Hi all,
>>
>> I have been asked to help with the construction of a Foucault pendulum.
> This
>> is a long pendulum which oscillates in a slow stately fashion in a fixed
>> plane which appears to move as the earth rotates. In reality the
> surrounding
>> environment is really moving relative to the plane of oscillation.
>>
>> The pendulum requires a sustaining system to compensate for the
>> inevitable
>> energy loss with each swing. The system is located in the building and
>> therefore rotates relative to the pendulum. It needs to provide an
>> impulse
>> which does not affect the plane of oscillation of the pendulum. I was
>> thinking of an electromagnet located below the centre of the swing which
>> would be pulsed appropriately as the bob passes over it.
>>
>> Has anyone here had any experience with such a system of have any
>> suggestions regarding the sustaining system? This is an interesting and
>> challenging project.
>>
>> Cheers,
>>
>> Morris
>>
>>
>>
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
>>
>>
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>






More information about the time-nuts mailing list