Mystery Instrument

[Martin King 2Participant @martinking2]

Hi All,

Just got this is an auction lot of tooling along with some tractor models and about 15 very odd case drill bits with strange inserts by ISCAR. the bits have longitudinal holes through them, (for coolant?), they look expensive !

Have not been able to research any idea of what this is used for.

Any help here would be most welcome.

Regards,

Martin

[Martin King 2Participant @martinking2]

ZEISS Snap Marker? What is it please?

[Roger Provins 2Participant @rogerprovins2]

The only reference I can find is …

"In this project a simple mirror stereoscope has been adapted to allow for the stereoscopic inspection of X-ray pictures and a Zeiss 'snap' marker …"

http://link.springer.com/article/10.1007/BF02442296#page-1

Not that I'm any the wiser!

[Neil WyattModerator @neilwyatt]

It's a Zeiss "Snap" marker used for chiseling out a circle of emulsion on x-rays so that you can mark a feature.

link.springer.com/article/10.1007/BF02442296#page-1

Only one relevant hit on google! You learn something useless every day

Neil

Edited By Neil Wyatt on 06/09/2015 18:51:40

[Clive HartlandParticipant @clivehartland94829]

Maybe now totally redundant because of magnetic resonance imaging!

Clive

[John McNamaraParticipant @johnmcnamara74883]

Hi Martin

I rather like it in particular the serrated Hirth coupling?

Looking at the picture it appears the two two faces can join properly. a very accurate way of indexing two parts

the indexed angles become more accurate with use due to the wear averaging the spacing over time.

**LINK**

One of my dreams is to own a Moore indexing table, a last century marvel that is still in high demand today.

**LINK**

Maybe you could repurpose the device and make a micro version of the Moore table?

Regards
John

[mark costello 1Participant @markcostello1]

Could someone explain this is a regular language?

[Martin King 2Participant @martinking2]

Hi All,

Despite having a VERY rudimentary knowledge of X-Ray diffraction from Uni many years ago I still cannot quite understand what this thing actually does and totally echo Mark's post above

I think this is destined for EBay as it is of no use to me at all!

Martin

[Neil WyattModerator @neilwyatt]

It's not clear, but I think that you align the images (manually) for stereoscopic viewing, which means getting rotation and alignment correct.

This beast is then used to place reference marks on the two x-rays so that they can easily be re-aligned.If you don't want to make and re-use stereo pairs of x-ray photos, it is no more than a curiosity.

Neil

[KWILParticipant @kwil]

Not only redundant due to MRI (Magnetic resonance imaging) but also by CT scanning and 3D reconstruction algorithms. Both of which you can rotate which you could not do with the stereo original method.

[IanTParticipant @iant]

I rather liked John's idea of re-purposing it as a super accurate indexing table – but I will admit to having quite a few odd things still lurking under the bench awaiting "re-purposing" many years later!

I was also thinking about how they cut the radial teeth on the Moore rotary tables – initially thinking it would be easy on the shaper but I don't think it would be quite that simple.

Regards,

IanT

[John McNamaraParticipant @johnmcnamara74883]

Hi All

It you are interested in how Moore tables were made look for Foundations of Mechanical accuracy here:

**LINK**

Worth a browse for other old text's too I found one I have been after for a while.

Regards
John

[Martin King 2Participant @martinking2]

Now listed on the 'Bay!

Thanks to all for the info.

Martin

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