Indeed, the book "Longitude" is fascinating. Never ceases to amaze me how
18th century technology was able to accurately produce consistent
watch/clock parts. Re the wristwatch, I took a different path. About 35
years ago, for the princely sum of $200, I purchased a Hamilton manual wind
mechanical wristwatch. It has a commodity grade Swiss movement, stainless
steel case and a nylon band. I have worn it continuously all these years.
Only failed once when the glowing material flaked off the hands and gummed
up the works. Had it cleaned ($60) and never looked back. It has always
lost about a minute or two a week, but I just reset and move on. I think
I've gotten my money's worth out of it.
Charlie
On Fri, Nov 30, 2018 at 12:33 AM Moose <olymoose@xxxxxxxxx> wrote:
> On 11/29/2018 5:05 PM, Mike Gordon via olympus wrote:
> > Some new configuration of ytterbium optical lattice clock it seems.
> Reproducible to the 10**-18 level and should be a tool to
> > detect gravitational waves and probe for detection of dark matter--very
> cool.
> >
> >
> https://www.sciencealert.com/scientists-have-developed-atomic-clocks-so-precise-they-could-detect-gravitational-waves
> >
> >
> > Not exactly like my Grandmother's Tiffany never-wind which was an early
> battery powered torsion pendulum clock from early 1920's. I think I may
> have broken it as a kid trying to tinker with it.
> > It was back impulsing so had to install a diode which I doubt is
> appropriate for the time. Could never get it more accurate than 2-3
> min/day and sent it to
> > 3 electrical horologists. They could not do that much. There
> apparently are just some problem clocks.
>
> Both the history of clocks, (esp. the drive to develop a shipboard clock
> accurate enough for latitude determination) and
> chaos theory show that such a design can never be very accurate. Smaller
> size/higher frequency make for accuracy.
>
> Among my too many watches, a $10 Chinese off brand and a $40 Timex are the
> ones that don't need resetting between time
> and battery changes.
>
>
> BTW, I can't imagine you wouldn't enjoy a visit to the Willard House &
> Clock Museum <https://willardhouse.org/> in
> Grafton. We spent a pleasant and informative hour or so on the tour. I
> can't imagine you wouldn't find the gear making
> machines fascinating.
>
> Horo Logical Moose
>
>
> --
> What if the Hokey Pokey *IS* what it's all about?
> --
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