[time-nuts] New ± 1 sec in 100 days mech clock

Dan Kemppainen dan at irtelemetrics.com
Wed Apr 22 10:03:24 EDT 2015


In all reality, achieving these results without decades of experience is 
probably unlikely. That said, are the specific plans available or 
published anywhere? Is is possible that someone willing to build and 
tinker could make a 'functional' copy of this unit?

I would guess that not all of the parts need extreme tolerances. But 
even then many mills are holding positioning tolerances well under 
.001", with tool deflections of .0001" or under (if run and maintained 
properly, that is). My 'list' includes a mechanical clock build. And 
this one would be a dandy to try to build!

In any case, the clock is still interesting to read about! It's great 
that some of you are lucky enough to get to see it! :)


On 4/21/2015 12:00 PM, time-nuts-request at febo.com wrote:
> You could always use the traditional method of piercing saw and files.
> Thinking about it I suppose files were the original milling machine.  Be
> aware that the horological approach is different from the engineering
> approach and there are numerous traps waiting for the unwary.  Harrison
> and Martin's clock B have remarkable performance but could still be
> improved by using multiple pendulums to overcome the noise effects for
> example a two pendulum clock is performing within 1 second in six months
> (so far) so I will have to get the hacksaw out for the three pendulum
> version - or is it back to the GPSDO.
> Peter

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