Member postings for Michael Gilligan

Is this any help, vic ?

**LINK**

https://www.furniturenmarkt.de/Spannzangen-BOLEY

… aside from making you feel fortunate.

MichaelG.

This may be of interest: **LINK**

https://books.google.co.uk/books/about/An_Epitome_of_Navigation_and_Nautical_As.html?id=rvg_BRfIckEC&redir_esc=y

She also has a Wikipedia page

MichaelG.

Bernard,

It may be worth looking at this thread from another forum: **LINK**

https://bbs.homeshopmachinist.net/forum/general/1874266-third-machinist-bedside-reader-free-download

… there are some ‘warnings from the wise’ included there.

MichaelG.

Thanks, as always, David

MichaelG.

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Likewise … and particularly intrigued by this little ‘teaser’ …

Besides detailed drawings, machining instructions and how-to-use info, several ‘extras’ are included, like how to make a lathe sub-faceplate that thinks it’s a magnetic chuck. The "power supply" costs about $2, and it works on ferrous and non-ferrous materials alike - this info alone could be worth the whole price of the drawings!

[sorry about the font change … I just copied and pasted]

MichaelG.

I think you might find this previous thread useful, Neville: **LINK**

https://www.model-engineer.co.uk/forums/postings.asp?th=97908&p=1

MichaelG.

Try this, Sam :**LINK**

https://books.google.co.uk/books?id=bd7pbFyPCuIC&pg=RA6-PA30&lpg=RA6-PA30&dq=hartnup+bond+escapement&source=bl&ots=eeymCh9dla&sig=ACfU3U1ypyCJ2BYoogJ1oCgiKOubcUQKRA&hl=en&sa=X&ved=2ahUKEwimo5mt17_4AhWMCcAKHcIKCN0Q6AF6BAgeEAM#v=onepage&q=hartnup%20bond%20escapement&f=false

MichaelG.

The missing teeth were, I believe, an improvement introduced after the original build

I do have some information about the modification, but cannot locate it at present.

MichaelG.

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What makes you think that the rod of the conical pendulum is 1m long

MichaelG.

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Edited By Michael Gilligan on 21/06/2022 20:23:59

PTFE washers are available

MichaelG.

Nicely put, John

In my opinion … The Bond was a work of genius

MichaelG.

[ sorry]  … duplicate post

MichaelG.

Edited By Michael Gilligan on 21/06/2022 00:57:38

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It’s worth watching this :

Be wary of ‘unsophisticated’ black anodising … it tends to fade to purple with prolonged exposure to light, and also on contact with soluble cutting oil.

Obviously, these characteristics will vary with the specific materials.

MichaelG.

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Edited By Michael Gilligan on 19/06/2022 13:15:09

Loosen the belt

Seriously … if you can’t do that, you are either using the wrong size belt or a very badly designed machine.

MichaelG.

Too late to edit, but this is the style of pin clamping/connecting used on my big LOMO microscope:

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MichaelG.

Gallum

I think the underlying problem that you have is the inadequate quality of contact in that type of holder.

The lamp pins oxidise because of the heat generated by contact resistance

A much better arrangement [commonly used in microscope illuminators] is to clamp the pins down on a vee groove; but, of course, you may not have space to do this.

MichaelG.

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P.S. __ digressing somewhat: This article may be of general interest

https://zeiss-campus.magnet.fsu.edu/articles/lightsources/tungstenhalogen.html

Edited By Michael Gilligan on 19/06/2022 06:57:11

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Not sure if that “… well” was intended for me

… but, if so, it completely misses my point.

MichaelG.

Hopper’s explanation seems eminently logical to me

My only slight misgiving is that I would find it difficult to describe those areas as V-shaped

… perhaps I need help

MichaelG.

My guess is that the nominal PCD might be 75mm

… if you share your raw measurements, everyone can have a go at working from those

MichaelG.