[time-nuts] GPS disciplined mechanical clocks
sar10538 at gmail.com
Wed Mar 4 12:46:02 UTC 2009
2009/3/5 Martin Richmond-Hardy <martinrh45 at googlemail.com>:
> Steve,See http://www.britishtelephones.com/clocks/exchange.htm and
> http://www.britishtelephones.com/clocks/clock36.htmMight give you a few
> construction ideas.
Thanks. Now that would make an impressive item in the house. I do
remember the exchange slave clocks in the exchanges when I first
worked for BT way back at the beginning of the 70's. There was
probably one of the master units somewhere safe in the exchanges but I
can't remember seeing them.
As for accuracy, it's hardly time-nuts standard at "Clock No, 36 to
keep G.M.T. to an accuracy of 8 seconds variation per week"
> "Ah, they don't make them like this any more. It's the wood, you know, you
> can't get the wood." H.Crun.
And the brass, you can't get brass like that anymore :)
> 73 Martin G8BHC
> 2009/3/4 Steve Rooke <sar10538 at gmail.com>
>> Has anyone looked at locking an old mechanical clock to precise time?
>> What I'm thinking of is something like an old cuckoo clock. The rule
>> is that the clock remains basically standard and is only steered by
>> the external source, say, by a magnetic pulse to the pendulum, IE. no
>> physical connection. Obviously the correct period of the pulse would
>> have to fit the timing of the pendulum. OK, it seems pointless as you
>> can't read time with any real accuracy on something like a cuckoo
>> clock but I'm sure there is the likelihood of something like this
>> being done by someone like us.
>> Steve Rooke - ZL3TUV & G8KVD & JAKDTTNW
>> Omnium finis imminet
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to
>> and follow the instructions there.
> Martin Richmond-Hardy
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
Steve Rooke - ZL3TUV & G8KVD & JAKDTTNW
Omnium finis imminet
More information about the time-nuts