Good Afternoon
Always nice to know that David is still remembered for his beautiful
instrument. I had high hopes of continuing the building of the Aten
Heliochronometer after his death but as I am no machinist, I was unable to find
anyone to make the dial at a reasonable cost.
My sincere apologies for any confusion caused by the continuing existence of
the website. As always in life, many other more pressing matters have had to be
dealt with. This conversation serves as a reminder that I need to look in to
what needs to be done.
I continue to listen and learn through your conversations.
Sincerely
J Gard
Sent from Windows Mail
From: Tom Kreyche
Sent: Thursday, May 23, 2013 10:07 AM
To: sundial@uni-koeln.de
I wonder if there is an upper weight limit on "portable" sundials. Back in the
old days of computers, there was a "luggable" category - maybe we should revive
this as a sundial classification. Even with substantial material cutouts, a
30-40 cm brass dial would be a candidate.
With my Wild Heerbrugg T3000 Digital Theodolite equiped with a Roelofs Solar
Prism I can achieve a few seconds accuracy for solar observations by taking a
great deal of care with the sophisticated leveling system, assuming the base is
stable, the temperature doesn't change, there is no wind and you don't touch
the instrument. No doubt an experienced surveyor with astronomical osbservation
experience can do better, or perhaps an experienced navigator with a good
sextant.
...Tom Kreyche
From: "Kevin Karney" <kar...@me.com>
To: "John Carmichael" <jlcarmich...@comcast.net>
Cc: "Sundial Mailing List" <sundial@uni-koeln.de>
Sent: Thursday, May 23, 2013 9:33:46 AM
Subject: Re: Man Wants heliochronometer
That is an Aten Sundial made by J. D. Gard
http://atensundials.com
Sadly Mr Gard has died and I do not know if the business has been continued by
his wife. The website invites e-mail enquiries and no longer gives prices.
These dials are latitude adjustable, correctable for longitude and summer time
hours. They are meant for permanent installation so no do have levelling screws
or compass. There is no my knowledge any heliochronometer that will tell the
time better than 30 seconds accuracy, but I would love to be corrected on that!
Best regards
Kevin
On 23 May 2013, at 16:26, John Carmichael <jlcarmich...@comcast.net> wrote:
This man wrote to me wanting to order a particular type of heliochronometer. I
told him that I do not manufacture what he wants and that I would forward his
resquest to The Sundial List. Perhaps one of you can sell him what he wants.
See his description and photo below.
Thx
John
From: ja.humb...@bluewin.ch [mailto:ja.humb...@bluewin.ch]
Sent: Wednesday, May 22, 2013 4:11 PM
To: jlcarmich...@comcast.net
Subject: Accurate heliochronometer
Hello,
You do what I like!
I am looking for a very accurate portable heliochronometer that can tell the
time to the second in brass, no wood you know why! Shape more or less like
picture, but with large Vernier scale, graduated latitude dial in half degrees
around ca lat. 30 and 60, size 30-40 cm dial ring diameter, base plate with
leveling screw for horizontal setting, compass in the base, precise and large
analemma for equation of time, engraved hours and minutes on the ring if
possible, motto and figurine on it. My position : lat. 46°31 minute N/long.
6°38 minute 50 sec. E.
How about the price ?
Best regards,
Jacques Humbert
Av. de Rumine 11
1005 Lausanne/CH
atenII
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