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: [email protected] [mailto:[email protected]] 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: [email protected] [mailto:[email protected]] 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 -- [email protected] >> To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> >> >> > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
