I have two pendulum clocks, one a 1930s-era torsional pendulum clock from Bavaria and the other a swinging pendulum clock built around 1990. I will follow this thread closely.
Tom, you mentioned that there are lots of resources out there - can you elucidate? Thanks. DaveD Sent from a small flat thingy > On Nov 20, 2019, at 21:18, Adrian Godwin <[email protected]> wrote: > >> On Thu, Nov 21, 2019 at 2:01 AM Bill Beam <[email protected]> wrote: >> >> Most people interested in this problem have been dead for about 200 years. >> >> I knew there was a reason why I didn't feel so well lately .. > > > I have an electric pendulum clock by Bulle. A coil swings in a short arc, > following a curved magnetic polepiece. At some point, contacts close and > provide a timed sustaining impulse to the coil. > > Out of sheer pigheadedness, I am attempting to monitor the movement with > antique (perhaps not quite so antique) timing equipment. I have an HP456A > current probe to capture the impulse instance, an HP 5275A counter to > measure the period and an HP101A oscillator to provide a reference. ADEV > calculations might be done by an HP9815 calculator or perhaps an HP41 if I > can't find the 9815's parallel interface. Non-HP equipment is permitted but > nothing suitable has come up so far. > > A difficulty at the moment is that the contacts bounce somewhat, making > the impulse timing poorly defined. I haven't yet got as far as seeing any > mechanically caused pattern to the errors. > > Thanks to Tom for giving me more distractions to read :) > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
