[time-nuts] Visiting Greenwich

[William H. Fite]

The ring counters are called dekatrons. I built a clock/timer using them
when I was 12 or so.


On Tuesday, July 5, 2016, Alan Melia <alan.melia at btinternet.com> wrote:

> Hi Clint I think when I discussed this last a few years ago with the
> speaking clock designer and David Rooney the man responsible for the time
> gallery at Greenwich. The clock is an early quartz unit, probably made at
> the then Post Office Reseach Labs at Dollis Hill in NW London.  The clock
> is quite a beast ! It was found in a skip (Dumpster) having been donated to
> a university in the late 1940s, and was refurbished by a local enthusiast
> for David. He did a good job because I believe he had no access to any
> documents or circuits. I tried to find some information but it would seem
> the archive has been lost (vandals !!) It probably contains strange things
> like neon ring counters :-))
>
> Alan
> G3NYK
>
> ----- Original Message ----- From: "Clint Jay" <cjaysharp at gmail.com>
> To: "Discussion of precise time and frequency measurement" <
> time-nuts at febo.com>
> Sent: Tuesday, July 05, 2016 9:13 PM
> Subject: Re: [time-nuts] Visiting Greenwich
>
>
> They also have TIM the speaking clock which has a rack mounted  atomic
>> standard.
>> On 5 Jul 2016 21:01, "John Dalziel - crashposition" <
>> john at crashposition.com>
>> wrote:
>>
>> I would also recommend the Worshipful Company of Clockmakers collection at
>>> the Science Museum. It’s a great collection and they have some of
>>> Harrison's wooden long case clocks as well as his final chronometer, H5.
>>>
>>>
>>>
>>> http://www.sciencemuseum.org.uk/visitmuseum/plan_your_visit/exhibitions/clockmakers-museum
>>>
>>>
>>> John Dalziel
>>> computus.org
>>>
>>>
>>> Message: 4
>>> Date: Mon, 4 Jul 2016 18:31:35 -0400
>>> From: Dave Martindale <dave.martindale at gmail.com>
>>> To: Discussion of precise time and frequency measurement
>>> <time-nuts at febo.com>
>>> Subject: [time-nuts] Visiting Greenwich
>>> Message-ID:
>>> <CAJU10Sv0GzUFmSJ5O3eoewWf40EokTYtrANLbZfg8KVw6KcW5g at mail.gmail.com>
>>> Content-Type: text/plain; charset=UTF-8
>>>
>>> I am in London England at the moment, playing tourist with the rest of my
>>> family. I want one day to be a visit to the National Maritime Museum at
>>> Greenwich, which includes the Royal Observatory Greenwich. I am
>>> particularly interested in seeing Harrison's H1 through H4, plus other
>>> high-precision mechanical timekeepers (pendulum clocks, etc).
>>>
>>> I know they are at the NMM - their web site shows some of them. But where
>>> are they located on the site? The NMM has a large main building down near
>>> the Thames, while the Royal Observatory and related buildings are on the
>>> top of a hill further inland in Greenwich Park. Are the chronometers and
>>> other precision timekeepers on display somewhere in the Royal
>>> Observatory,
>>> or down in the main NMM building? I've spent an hour or two browsing web
>>> sites without finding this particular bit of information.
>>>
>>> I figure there must be list members who have visited the NMM, and know
>>> where the precision timekeepers are actually displayed.
>>>
>>> Thanks,
>>> Dave
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>
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