[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
Re: [ATM] mechanical setting circles / computer program?
Dear Harro,
My method is one of the truly clever things I have ever invented. Let me
write a short article about it for you; it is not difficult to understand,
but it will be tricky to explain it in just words. I am too spread out right
now to draw any pictures to illustrate my method (to take the extra time to
do so), however I am sure that I can make it understandable to anyone just
with a clearly worded explanation. I will send you some pictures of the
large declination circle I laid out with it. If the circle is near to your
needs, I have a precision cut stencil that I laid out with the method I will
shortly write up and send to you. I could mail you this thin, posterboard
stencil, rolled up in a mailing tube, if you would like to borrow it. Let me
send you some pictures right away, and then give me time to write up the
method. It is a novel modification of the method of subdividing an angle
with a compass and straight edge. I write well, so I think I will be able to
make it clear for you, and any others who want to request the method. I will
work on it right away, and I will send to you some pictures right away
(after this reply) in an html email of my setting circles I made this way
for my big mount.
Actually, you can see one of them here, although at a distance. I will send
you some close-ups. See the declination setting circle I laid out to such a
degree of accuracy, here:
http://www.atmsite.org/contrib/Harbour/Photos,%20med/ROLL3JPEG-7.JPG
Any others on the list, who would like to know my method (which will divide
a circle, super accurately, to any small increment you should care to take
it too, including single degrees of arc, without loss of accuracy, even to
the ultimate limit of subdividing) please request me to send to you an html
email about it, with pictures. A large, old fashioned circle is useful. The
wheel is several thousand years old, and it is still useful. Dobbie and
Equatorial owners can benefit from large circles.
Like my other inventions (several) the method is so simple you will be
astonished. Any of you who would like to have this explanation, just request
it. And I will send you the pictures right away, Harro.
I will try to write up the explanation, the method, today.
Davey
N9606H
----- Original Message -----
From: "Treur, Harro" <harro.treur@waternet.nl>
To: "'David Harbour'" <scarab2@cox.net>
Sent: Friday, March 17, 2006 8:17 AM
Subject: RE: [ATM] mechanical setting circles / computer program?
> Hello David,
>
> I am intereseted in the method you describe. I do not wholly understand
> it,
> but would you be so kind to sent me a picture too?
>
> Best regards
> Harro Treur
> Netherlands
>
>
>> -----Oorspronkelijk bericht-----
>> Van: David Harbour [mailto:scarab2@cox.net]
>> Verzonden: vrijdag 17 maart 2006 14:29
>> Aan: j h; atm@atmlist.net
>> Onderwerp: Re: [ATM] mechanical setting circles / computer program?
>>
>>
>> Dear Charles,
>>
>> And all:
>>
>> I have devised a wholly original method of producing setting
>> circles with a
>> beam trammel compass, that will allow you to infinitely
>> divide a circle with
>> UNBELIEVABLE ACCURACY. It is a new modification of a method
>> of subdividing
>> angles "hexigesimally". I provided my big Phoenix mount with
>> declination
>> circles that were very large, and easily readable, this way.
>> If any of you
>> would like a picture of an example of one of those
>> declination circles (I
>> subdivided them both down to five degree increments, and
>> planned to add the
>> one degree increments later) I have some very nice pictures
>> of them on my
>> hard drive. Please ask for them.
>>
>> Usign a computer program to do it is fine; the trouble is,
>> many printers
>> will not print exactly equal increments in X and Y (exactly identical
>> increments). I guarantee my method for producing uncannily accurately
>> subdivided angular (declination cirles, or "Cs" as I call
>> them; you will see
>> why if you ask for the pictures) arcs with marked divisions.
>> Takes a little
>> bit of time, but what is atm-ing for? The old Albert
>> Ingalls/Scientific
>> American Telescope making books asserted (there is a quote in
>> one of them,
>> certainly) to the effect that telescope making is quite
>> appropriately for
>> "killing time". Ask for my help, Charles.
>>
>> I think you, and others, will be delighted to find out that
>> you can do
>> something without a computer or a complicated machine, and be
>> able to do it
>> perfectly.
>>
>> David
>> N9606H
>>
>>
>> ----- Original Message -----
>> From: "j h" <quantemlp@hotmail.com>
>> To: <atm@atmlist.net>
>> Sent: Thursday, March 16, 2006 9:18 PM
>> Subject: [ATM] mechanical setting circles / computer program?
>>
>>
>> > Greetings,
>> >
>> > I am planning on using mechanical setting circles on my dob that Im
>> > building. I have heard of, and came across mention of computer
>> > programs, simply designed, that will do the math for me so
>> all i have
>> > to do is align to my setting circles and off I go. Can
>> anybody offer
>> > some information on this. I even heard something about a tape
>> > measure????
>> >
>> > thanks
>> >
>> > Charles Federico
>> >
>> >
>> > _______________________________________________
>> > ATM mailing list http://www.atmlist.net/
>> >
>>
>>
>> _______________________________________________
>> ATM mailing list http://www.atmlist.net/
>>
>
> Waterleidingbedrijf Amsterdam is per 1 januari 2006 gefuseerd met DWR tot
> Waternet.
> De adressen en telefoonnummers blijven voorlopig gelijk. De emailadressen
> zijn al
> wel gewijzigd maar de oude emailadressen blijven voorlopig bestaan.
>
> _________________________________________________________________
>
> De informatie verzonden in dit e-mailbericht is vertrouwelijk en
> uitsluitend bestemd voor de geadresseerde. Openbaarmaking,
> vermenigvuldiging, verspreiding en/of verstrekking van deze informatie aan
> derden is, behoudens voorafgaande schriftelijke toestemming van Waternet,
> niet toegestaan.
> Waternet staat niet in voor de juiste en volledige overbrenging van de
> inhoud van een verzonden e-mailbericht, noch voor tijdige ontvangst
> daarvan.
>
> _________________________________________________________________
>
_______________________________________________
ATM mailing list http://www.atmlist.net/