Dear Frank,
As ever, you prompt several interesting
trains of thought...
> In fact any run-of-the-mill astro-navigator
> with a merely passable sextant could at
> least manage an accuracy of a minute of
> arc...
I have never used a sextant but I have
heard this arc-minute figure so many
times I
Greetings, fellow dialists,
Tom Kreyche wrote:
"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
is still
available) is a Gunning.
Despite the claims, I think the Pilkington Gibbs heliochronometer is only
accurate to 2 minutes, - it is only marked in 2 minute divisions and the cam is
probably worn after 100 years!
The P&G Sol is marked to 1 minute and probably can (just) if you can find
, 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
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
;John Carmichael"
Cc: "Sundial Mailing List"
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
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
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
12 17:46
> To: 'Douglas Bateman'; 'Kevin Karney'
> Cc: sundial@uni-koeln.de
> Subject: RE: eBay : ANTIQUE HELIOCHRONOMETER BRONZE SUN DIAL SCIENTIFIC
> INSTRUMENT
>
> John Gunning of Petersfield is still a member of the BSS.
> Best wishes,
> Jackie Jone
teman'; 'Kevin Karney'
Cc: sundial@uni-koeln.de
Subject: RE: eBay : ANTIQUE HELIOCHRONOMETER BRONZE SUN DIAL SCIENTIFIC
INSTRUMENT
John Gunning of Petersfield is still a member of the BSS.
Best wishes,
Jackie Jones, BSS membership secretary
-Original Message-
From: sundial
: Re: eBay : ANTIQUE HELIOCHRONOMETER BRONZE SUN DIAL SCIENTIFIC
INSTRUMENT
Not antique! Im fairly certain it was made by J P Gunning, of Petersfield,
Hampshire (as on the dial with initials JPG). He may still be a member of
the British Sundial Society.
Otherwise a perfectly serviceable
I have told the seller that it is neither antique nor bronze, but he has
ignored the information.
Mike Shaw
53º 22' North 03º 02' West
www.wiz.to/sundials
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
Not antique! Im fairly certain it was made by J P Gunning, of Petersfield,
Hampshire (as on the dial with initials JPG). He may still be a member of the
British Sundial Society.
Otherwise a perfectly serviceable instrument.
Regards, Doug
On 5 Sep 2012, at 12:05, Kevin Karney wrote:
> I came
I came across the attached on eBay
http://www.ebay.co.uk/itm/ws/eBayISAPI.dll?ViewItem&item=320976724417&ssPageName=ADME:B:SS:GB:1123
anyone interested?
Kevin Karney
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
Sunny Day!
This isn't a card dial but it is made of paper and might just get you to
lunch on time. It could work for the application that Gerard Hughes spoke
about. It can be adjusted for latitude, longitude and the equation of time.
Unfortunately it will only work for half the year.
It is an equat
17, 2006 8:27
PM
Subject: Re: Heliochronometer card
dials?
Gerard,
You could make a sheperd's dial. These are
location specific.
Attached is a picture of the scale for such a
dial with correction for longitude and equation of time.
It would be better if you make two, one
it first, I'll be the first to applaud!
'Leisure' is a good word in this context as it took me best part of a
month to calculate all the tiny offsets and then convert them into
separatly rotated 'verniers' for each month for my Lindi/SOL
heliochronometer which is, as ye
Hi,
A while back Gerard Hughes started a thread on accurate card dials:
Ok,
so I do realize that "heliochronometer"
and "card dial" are sort of mutually exclusive. I’m looking for a way to make
some easy to read card dials that read in standard mean time.
One
"Sundial List"
Copies to: Subject:Heliochronometer card dials?
Ok, so I do realize that "heliochronometer" and "card dial" are sort of
mutually exclusive. I´m looking for a way to make some easy to read card
dials that read in standard mean time.
I work
[EMAIL PROTECTED]
- Original Message -
From: "Fred Sawyer" <[EMAIL PROTECTED]>
To: "Dave Bell" <[EMAIL PROTECTED]>; "Sundial List"
Sent: Wednesday, October 18, 2006 10:35 AM
Subject: Re: Heliochronometer card dials?
The Icarus dial
Hi Gerard,
I'd like the dial to read in mean time because initially I'd like to be
able to skip the explanation of Local Apparent Time vs. Mean Time and
such.
It's not qite chronometer accuracy, but feel free to use modify the time
scale in this card ring dial.
It was done in MS Word.
http:
The Icarus dial can be seen at:
http://www.heliosuhren.de/E_main_19_00.html
- Original Message -
From: "Dave Bell" <[EMAIL PROTECTED]>
To: "Sundial List"
Sent: Tuesday, October 17, 2006 5:35 PM
Subject: Re: Heliochronometer card dials?
On Tue, 17 O
t.at/sondereh/sun.htm
Roger Bailey
Walking Shadow
Designs
N 48.66 W 123.4
-Original Message-From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]On Behalf Of fer de
vriesSent: October 17, 2006 12:28 PMTo: Gerard Hughes;
Sundial ListSubject: Re: Heliochronometer card
dials?
Gerard,
/deltacad.htm
John C.
From:
[EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gerard Hughes
Sent: Tuesday, October 17, 2006
11:36 AM
To: Sundial List
Subject: Heliochronometer card
dials?
Ok, so I do realize that "heliochronometer"
and "card di
On Tue, 17 Oct 2006, Fred Sawyer wrote:
> The Icarus dial by Carlo Heller is a universal ring dial with adjusments for
> longitude, dst, and equation of time.
I'm not familiar with that design, and couldn't (quickly) find a reference
to it, but what about something like this, cut from heavy ca
equation of time.
- Original Message -
From:
Gerard Hughes
To: Sundial List
Sent: Tuesday, October 17, 2006 4:58
PM
Subject: Re: Heliochronometer card
dials?
Chris Lusby Taylor wrote on 10/17/06, 1:28 PM:
"Actually, I thought "h
Chris
Lusby Taylor wrote on 10/17/06, 1:28 PM:
"Actually,
I thought "historical reenactment" and "standard mean time" are sort of
mutually exclusive."
Well, in the strict sense you are right, although there are historical
re-enactments that take place in time periods after time was
standardi
To: Sundial List
Sent: Tuesday, October 17, 2006 7:36
PM
Subject: Heliochronometer card
dials?
Ok, so I do realize
that "heliochronometer" and "card dial" are sort of
mutually exclusive. I’m
looking for a way to make some easy to read card dials that r
List
Sent: Tuesday, October 17, 2006 8:36
PM
Subject: Heliochronometer card
dials?
Ok, so I do realize
that "heliochronometer" and "card dial" are sort of
mutually exclusive. I’m
looking for a way to make some easy to read card dials that read in standard
mea
Ok, so I do realize that "heliochronometer"
and "card dial" are sort of mutually exclusive. I’m looking for a way to make
some easy to read card dials that read in standard mean time.
I work at a number of historical reenactment fairs and I’d love a quick
and portable wa
The right url ishttp://www.precisionsundials.com/sundial_list.htmwithout point and 'clickable' Willy LeendersHasselt, Flanders (Belgium) Op 15-nov-05, om 18:54 heeft [EMAIL PROTECTED] het volgende geschreven:Tony Moss of Lindisfarne Sundials sent me some photos of different models of Homan's sundi
Tony Moss of Lindisfarne Sundials sent me some photos of different models of Homan's sundials. I have placed them for viewing at www.precisionsundials.com/sundial_list.htm.
-Bill
I think I did see photos of one from South Africa in an e-mail about 2 years ago from someone who wanted to know more about a sundial they had. It looked alot like a cross between a Pilkington and Gibbs Sol Horometer and their better known Heliochronometer as I recall. I could kick myself in
Bill Gottesman wrote
"The answer is yes. I think it was called Homan's Heliochronometer, and
was made in South Africa. ..."
Althugh William Homan worked professionally in South Africa (and filed
patents from there) all the instruments by him that I've ever seen have
a Glasgow
Dave,
Pilkington and Gibbs certainly made a model of
their heliochronometer for the southern hemisphere.
I have a photo of one if you would like to see
it.
It's a Type 5, Serial number 598.
Mike Shaw
53.37 North03.02 West
www.wiz.to/sundials
d add more details.
Simon
--- [EMAIL PROTECTED] wrote:
> The answer is yes. I think it was called Homan's
> Heliochronometer, and was
> made in South Aftrica. Google was not that helpful.
>
> -Bill Gottesman
>
> In a message dated 11/14/2005 9:00:23 PM Eastern
The answer is yes. I think it was called Homan's Heliochronometer, and was made in South Aftrica. Google was not that helpful.
-Bill Gottesman
In a message dated 11/14/2005 9:00:23 PM Eastern Standard Time, [EMAIL PROTECTED] writes:
Hi all:
I have a question for list members. Does a
Hi all:
I have a question for list members. Does anyone know if a Southern
hemisphere heliochronometer has ever been produced? I would think one must
have been, but can find no reference to any on the net.
Perhaps the Pilkington could be made to operate below the equator?
TIA
Dave G.
http
Brooke Clarke [mailto:[EMAIL PROTECTED]
> Sent: 31 July 2002 17:03
> To: sundial@rrz.uni-koeln.de
> Subject: Re: Heliochronometer by Homan
>
> All US patents are on line.
> Sources for free on line TIF viewers can be found under help\How to Access
> Patent Full-page Images.
&g
ed technology!
Andrew James
N 51 04' W 01 18'
-Original Message-
From: Brooke Clarke [mailto:[EMAIL PROTECTED]
Sent: 31 July 2002 17:03
To: sundial@rrz.uni-koeln.de
Subject: Re: Heliochronometer by Homan
All US patents are on line.
Sources for free on line TIF viewers can be
--
> From: "Andrew James" <[EMAIL PROTECTED]>
> To:
> Sent: Wednesday, July 31, 2002 7:33 AM
> Subject: Heliochronometer by Homan
>
> > I have recently been shown an interesting brass heliochronometer made by
> W.
> > Homan of Glasgow according t
ROTECTED]>
To:
Sent: Wednesday, July 31, 2002 7:33 AM
Subject: Heliochronometer by Homan
> I have recently been shown an interesting brass heliochronometer made by
W.
> Homan of Glasgow according to his patent 18,568 of 1911. (I hope to
receive
> a copy of the patent shortly.)
>
>
+0100, you wrote:
>I have recently been shown an interesting brass heliochronometer made by W.
>Homan of Glasgow according to his patent 18,568 of 1911. (I hope to receive
>a copy of the patent shortly.)
>
>It is quite large, based on a 13 1/2" diameter hemisphere. It has tw
I have recently been shown an interesting brass heliochronometer made by W.
Homan of Glasgow according to his patent 18,568 of 1911. (I hope to receive
a copy of the patent shortly.)
It is quite large, based on a 13 1/2" diameter hemisphere. It has two
"gnomons", upright brackets
John et al,
My apologies. I was looking under "H".
The definition says "precision". Should this aspect be more "precise"?
i.e. what degree of precision should we expect?
Bob
[EMAIL PROTECTED] wrote:
>
> Hi Bob et al,
>
> "heliochronomet
Hi Bob et al,
"heliochronometer" is indeed listed in the BSS Glossary, under the "Dial types"
category. The definition given is:
"a precision sundial which incorporates some means to allow it to read civil
(or mean) time. This is usually achieved by incorporati
Fellow dialists,
What does the group think the criteria for a "heliochronometer" should
be?
Is there a definition? John Davis' most excellent glossary does not
include the term.
Regards,
Bob Terwilliger
-
ubject: RE: heliochronometer
Hi Peter,
I went to the Sky web page and to the Dec. 94 archives.
These must be the articles:
"36. Telescope Making - A Precision Sundial of Bronze
By Charles F. Avila | December 1994, p. 88
Order Original Issue
37. Telescope Making - Just How Accurate Can a Sundial
Stumpges
Sent: March 6, 2002 2:05 PM
To: 'sundial@rrz.uni-koeln.de'
Subject: RE: heliochronometer
Hi Peter,
I went to the Sky web page and to the Dec. 94 archives.
These must be the articles:
"36. Telescope Making - A Precision Sundial of Bronze
By Charles F. Avila | Decemb
Hi Peter,
I went to the Sky web page and to the Dec. 94 archives.
These must be the articles:
"36. Telescope Making - A Precision Sundial of Bronze
By Charles F. Avila | December 1994, p. 88
Order Original Issue
37. Telescope Making - Just How Accurate Can a Sundial Be?
By Ro
There is an article in Sky & Telescope magazine December 1994 that
inspired the heliochronometers I made.
Peter
--
Peter Hirtle [EMAIL PROTECTED] Seattle, WA.
-
Hello all,
With Robert Terwilliger's and Robert Kellog's
patient help, I've updated all known sundials in Arizona on the NASS registry.
Included are several fine photos and a lengthly description of my Flandrau
Planetarium Heliochronometer.
Go to: http://www.sundials.or
tone
monofilar heliochronometer with many many different functions. After much
testing, we are consistantly achieving 10 seconds time reading
precision!!!
Hope you like it, I can't wait to hear your
comments!
Flandrau Planetearium has posted it on their
website at: http://w3.arizona.ed
Hello all:
I thought you'd be interested in seeing some sample fotos at of my
equatorial heliochronometer featuring the bead-in-hole shadow sharpener that
we've been discussing.
Several images of this unique sundial can be seen on Dave Bell's website
at: <http://dialist.web
s you
can scan and share as email attachments?
Also, I hope your posting will encourage others to write of their
projects. Details, we crave details.
Best wishes,
Mac Oglesby
Anthony Eden wrote:
Yes, I am making a replica of the P & G Heliochronometer. In fact I
have been making it
Pilkington and Gibbs Heliochronometers.
Yes, I am making a replica of the P & G
Heliochronometer. In fact I have been making it for about four years or
more ! The trouble is that I have done all the easy bits, have been
in and out of hospital a few times since I began and am ra
Tom Mchugh wrote:
>
> My guess is the the most accurate sort of heliochronometer
> would have optical means of focusing a solar image on an
> analemma (figure 8), and would have optical means of observing
> the sun's image to judge when it is centered on the line.
>
>
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