5 Apr
2001
5 Apr
'01
12:53 p.m.
Shawn Rutledge wrote:
Siegmund Riefler, then R. J. Rudd, then (someone) Shortt, all designed
precision clocks that worked something like that. One problem with building
them yourself is that for best results the pendulum should be in a vacuum!
-- Derek
On Thu, Apr 05, 2001 at 08:53:53AM -0500, John Foust
wrote:
Pendulums
could be sync'd by starting their swing at the
same time by a pulse on a control line (which would release
a catch that had held the pendulum at top-swing), and they
could be re-sync'd and their swing regenerated with a well-timed
pulse to an electromagnet at the apogee of the swing-path.
That sounds pretty cool. Maybe someday it'd be fun to build a slave
grandfather clock, with the pendulum driven that way instead of by
weights. Has anything like that been built commercially?