Hi:
The Zendulum uses a magnetic ball as the pendulum (it rides on a curved track rather that from a string like the first
version) and there's a coil in the base.
Each pass over the coil causes the coil to output a pulse that drives a circuit that in turn sends a power pulse to the
coil repelling the magnet.
I would think this same circuit (maybe a higher power version) could be used to keep a pendulum going. If so the drive
train could be removed.
BUT . . . the quality of the time keeping is determined by the pendulum, this
is just how it's powered.
http://www.prc68.com/I/GeekStuff.html#Zendulum
If you want to retain the existing drive system then I like Paul's idea. i.e. a micro controller, coil and small magnet
so that you could speed up or slow down the pendulum to bring it back into phase after winding quickly. The DS3231 is a
fairly accurate real time clock that could be used to discipline the pendulum.
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
paul swed wrote:
Brian,
It would seem that while you are winding the clock, the pendulum could be
measured by the use of the same coil that syncs it. That way you would
sense the run down and over a short period after the clocks been wound
speed up to re-align the tick.
I could imagine a coil below the pendulum and perhaps every other second it
senses the pendulum and the next second it pulse the pendulum to realign
and power the clock.
If you feed energy to the pendulum why do you need weights? (May have just
gotten into trouble here).
Regards
Paul
WB8TSL
On Fri, Jan 31, 2014 at 7:23 AM, Brian, WA1ZMS <wa1...@att.net> wrote:
Mike-
Yes, I was wrong. The idea of constant driving power was around. Sadly
most of these early American tall clocks with often sand filled weights
used a simple design since as you noted cost was important and raw metals
such as brass was hard to produce locally and often imported from Europe.
I think the best I can do is to use the basic design from the article that
David noted and will have to adjust the clock once a week after winding.
-Brian, WA1ZMS/4
iPhone
On Jan 31, 2014, at 4:33 AM, mike cook <michael.c...@sfr.fr> wrote:
Le 31 janv. 2014 à 06:06, Brian, WA1ZMS a écrit :
< snip>
"Modern" pendulum clocks have a modified gear drive where the
escapement is still being driven while the main wheel is being advanced
to wind the weight cable. Not the case for 200+ year old clocks.
It is not so much the case that it wasn't available as not always
implemented . The problem, and its solution "maintaining power" had been
addressed by many since Christian Huygens in the 17th C. and also John
Harrison , the inventor if the marine chronometer in the mid 18th C.
Similarly the principle exists for spring wound clocks, but is often
omitted to keep the price down.
Regards,
-Brian, WA1ZMS/4
_______________________________________________
time-nuts mailing list -- time-nuts@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@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@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@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
