tim53
Postmaster
Reged: 12/17/04
Loc: Highland Park, CA
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Re: My latest, earliest project.
[Re: Al8236]
#4711686 - 07/25/11 10:57 AM
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Okay, I promise not to post lathe pictures unless I'm turning a telescope part with them!
-Tim.
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JoseBorrero
Carpal Tunnel
Reged: 09/04/09
Loc: MI
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Re: My latest, earliest project.
[Re: tim53]
#4959077 - 12/09/11 11:06 PM
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I'm really impressed how a scope arrived to the right person. Excellent Job! Tulley and Sons should be proud! 
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Pollux556
Pooh-Bah
Reged: 12/14/08
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Re: My latest, earliest project.
[Re: tim53]
#4959497 - 12/10/11 09:44 AM
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Tim,
This is very beautiful scope and interesting thread ! 
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tim53
Postmaster
Reged: 12/17/04
Loc: Highland Park, CA
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Re: My latest, earliest project.
[Re: JoseBorrero]
#4959499 - 12/10/11 09:45 AM
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Thanks for the comments, Jose! I'm ashamed to admit that I haven't had much time to work on the Tulley in several months. Doing home fixit jobs and other telescopes, plus the MSL launch!
I keep watching the ad sites for another Tulley, at least an OTA with an original lens, but haven't seen anything in a while. Lots of things like Broadhurst Clarksons, but most are 100 years newer than the Tulley.
I'll get 'er done one day, though!
-Tim.
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Svezda
scholastic sledgehammer
Reged: 06/01/07
Loc: Texas
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Re: My latest, earliest project.
[Re: Lew Chilton]
#5211477 - 05/08/12 05:26 AM
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Quote:
Quote:
Hi Tim,
In genreal, very old glass that I`ve seen has a distinctive green tint. I`m attaching a photo of a O. Hempel 90mm objective from around 1850. I hope the green shows.
Dan
If mememory serves, soda glass was used to make the old lenses, hence the green tint.
I think I remember reading that the Mt. Wilson 60- and 100-inch mirrors were made of soda glass by the St. Gobain glass works in France.
Yes indeed - and those mirrors when viewed through the back show the prettiest emerald green color that I've ever seen! -Jason
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PhilCo126
Carpal Tunnel
Reged: 01/14/05
Loc: coastline of Belgium
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Re: My latest, earliest project.
[Re: Svezda]
#5250147 - 06/01/12 09:24 AM
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Thanks for sharing, that's a real beauty 
This would fit very nice next to it in an exhibition:
The Victorian Amateur Astronomer: independent astronomical research in Britain 1820-1920
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tim53
Postmaster
Reged: 12/17/04
Loc: Highland Park, CA
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Re: My latest, earliest project.
[Re: PhilCo126]
#5250196 - 06/01/12 09:59 AM
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Hi Phil:
That mount pictured in the lower circle image is the closest thing I've seen to the Tulley mount! It'd be great if the book was chock full of pictures and old ads, but I suppose it's not?
Regardless, it might be a good one to add to the reference library!
-Tim
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PhilCo126
Carpal Tunnel
Reged: 01/14/05
Loc: coastline of Belgium
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Re: My latest, earliest project.
[Re: tim53]
#5251551 - 06/02/12 04:51 AM
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The book has lots of illustrations (check the Amazon.com preview which shows the contents & list of illustrations).
You might contact the writers of this book "in the making" to share some of Your practical insights 
Classic Telescopes: A Guide to Collecting, Restoring, and Using Telescopes of Yesteryear
By Neil english (Springer - 30 Sep 2012)
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PhilCo126
Carpal Tunnel
Reged: 01/14/05
Loc: coastline of Belgium
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Re: My latest, earliest project.
[Re: PhilCo126]
#5275476 - 06/17/12 11:19 AM
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O.K; Tim let us know when You've worked on this beauty... even when You just took some dust off 
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tim53
Postmaster
Reged: 12/17/04
Loc: Highland Park, CA
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Re: My latest, earliest project.
[Re: PhilCo126]
#5275481 - 06/17/12 11:23 AM
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Hi Phil:
It's been a while! I've been watching the ads for any signs of another Tulley, of course. Been tempted by a few offerings of refractors by other makers of similar vintage, though. Haven't been strongly attracted to anything yet, though I missed out on a Steward that apparently sold for a great price while I wasn't watching!
-Tim.
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terraclarke
Pooh-Bah
Reged: 05/29/12
Loc: Over the river and thru the wo...
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Re: My latest, earliest project.
[Re: tim53]
#5616256 - 01/10/13 08:53 PM
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Wow, I can't believe that I read this entire thread this evening after dinner and it was absolutely fascinating. Tim, you have an amazing telescope here and your work to restore it down to making your own nuts and bolts that look like the originals is even more amazing. Even getting a late 19th century lathe to make some of these parts, things with totally unstandard threads, wow! Double wow! Like I said, I am just amazed.
I do have a question. You were looking for brass tubing to cut and turn down to fabricate a new lens cell. Then you mentioned, in your own words, that you might have to "bite the bullet" and buy a large block of solid brass. Well you saying "bullet" got me to thinking of an ash tray that my dad brought back from WWII. It was fashioned from a shell casing from the 3 inch gun on his ship- a picket class sub chaser. Have you thought of using a brass shell casing for stock? Standard tank rounds, mortar rounds, and other small artillery rounds range for 75 to 88 mm and larger. Perhaps you could find a brass shell casing of approximate size and go from there (unless of course, you have already done so.)
Anyway, thanks for a fascinating read.
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Z28500
sage
Reged: 02/27/12
Loc: N. 30.1 W.-95.6 Texas
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Re: My latest, earliest project.
[Re: terraclarke]
#5643512 - 01/25/13 10:46 PM
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I'm sure you've already done the cell but here is a brass site for brass tube (other than speedymetals which is a site I use a lot):
http://www.lewisbrass.com/rbt.htm
I work with a lot of brass myself on a scope I built and you've done a great job on that scope of yours!
Z
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tim53
Postmaster
Reged: 12/17/04
Loc: Highland Park, CA
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Re: My latest, earliest project.
[Re: Z28500]
#5644207 - 01/26/13 11:13 AM
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Terra. That's an interesting suggestion I likely would have never thought of!
Z. No, I haven't worked on this scope for a long time. I need to get back to it! Thanks for the link.
Tim
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tim53
Postmaster
Reged: 12/17/04
Loc: Highland Park, CA
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Re: My latest, earliest project.
[Re: tim53]
#5808991 - 04/19/13 04:08 PM
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Deleted
Edited by tim53 (04/19/13 06:53 PM)
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Masvingo
sage
Reged: 01/10/12
Loc: Ayrshire, Scotland
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Re: My latest, earliest project.
[Re: tim53]
#5809009 - 04/19/13 04:21 PM
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Interesting picture, Tim. Did Dan say where it was taken?
James
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tim53
Postmaster
Reged: 12/17/04
Loc: Highland Park, CA
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Re: My latest, earliest project.
[Re: Masvingo]
#5809014 - 04/19/13 04:23 PM
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Oops, yeah. William Keith Murray Observatory (though I don't know where that is), between 1870-1890.
-Tim.
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tim53
Postmaster
Reged: 12/17/04
Loc: Highland Park, CA
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Re: My latest, earliest project.
[Re: tim53]
#5809023 - 04/19/13 04:28 PM
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Actually, the pic is from this website, apparently: http://www.dspace.cam.ac.uk/handle/1810/221778
The observatory was built by WKM, but was called Ochtertyre Observatory, Perthshire, Scotland. The website says that the pictures date to 1858, and that WKM lived from 1801-1861.
courtesy University of Cambridge, Institute of Astronomy Library
-Tim
Edited by tim53 (04/19/13 04:29 PM)
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Masvingo
sage
Reged: 01/10/12
Loc: Ayrshire, Scotland
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Re: My latest, earliest project.
[Re: tim53]
#5809027 - 04/19/13 04:31 PM
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Thanks Tim.
 Small world, fancy it being in Scotland!
I will need to read up on some history.
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tim53
Postmaster
Reged: 12/17/04
Loc: Highland Park, CA
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Re: My latest, earliest project.
[Re: tim53]
#5809033 - 04/19/13 04:38 PM
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Something along these lines would be nifty, too:
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Masvingo
sage
Reged: 01/10/12
Loc: Ayrshire, Scotland
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Re: My latest, earliest project.
[Re: tim53]
#5809039 - 04/19/13 04:43 PM
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Sure would, apart from a lot of the clear nights here being windy (high wind chill factor)  , the garden is also well illuminated by street lights (does make it easy reading the setting circles though) and something like that would give plenty of protection.
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