On Thu, 29 Mar 2007 15:45:25 -0700, Hal Murray <[EMAIL PROTECTED]> wrote:
> >How do modern pendulum clock geeks measure what their pendulum is doing? I'm >picturing a magnet on the bottom of the pendulum and a coil or hall effect >sensor. Prowl around here http://www.hsn161.com/links.html Particularly http://www.precisionclocks.com/ This guy's work is jaw-dropping. Fused quartz pendulum and arm, hall effect position sensing, running the whole affair in a vacuum, having a custom glass vacuum chamber fabricated by a scientific glass shop. Not pendulum related but look at this guy's work. http://www.angelfire.com/sd/rronnie/ My jaw dropped again. John --- John De Armond See my website for my current email address http://www.neon-john.com Cleveland, Occupied TN All great things are simple and many can be expressed in single words: Freedom, Justice, Honor, Duty, Mercy, Hope. -Churchill _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
