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.
