Who might have made this?

[Robert DoddsParticipant @robertdodds43397]

An aid to marking out, maybe.

[Robert DoddsParticipant @robertdodds43397]

Hi,

I've recently joined the Super Adept owners club and amongst the little bag of extras that goes with these things I spotted this little plate. I recollect that style of scribing being on old plastic 12" school rulers and the angled lines allowed you to split a dimension to 1/100" pretty easily. What type of craftsman would be likely to make and use something like this after school days?
I don't know the history of the Adept but is this plate typical of perhaps a watchmaker's toolkit or is there a better explanation of its history?

Bob D

[Michael GilliganParticipant @michaelgilligan61133]

Bob,

That's an interesting, and potentially useful litle device; it may have been used as a fine-reading scale on the Super Adept. … I wonder if you will find matching screw-holes on your lathe?

Incidentally; that marking is known as a Diagonal Scale, and I suspect that the third hole in your plate [upper-left in your photo] relates to the way it was engraved.  Although it's not a particularly pretty piece of work, I think it was probably made by someone who knew what he was doing.

MichaelG.

.

Edit: for those who may not be familiar; here is a good note about Diagonal Scales.

Edited By Michael Gilligan on 07/12/2014 04:39:13

[Michael GilliganParticipant @michaelgilligan61133]

^^ Bumped ^^

[because I think it's interesting]

MichaelG.

[WALLACEParticipant @wallace]

I could have done with something like this a few days ago when adapting a light to take a GU10 bulb…

A brief look with a rule gave the impression the bulb holder fixing screws where 12mm apart – the poor fit and a search on the net showed they should have been 12.1 !

W.

[mark costello 1Participant @markcostello1]

How does it work? Never seen one before.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by mark costello 1 on 10/12/2014 17:02:53:

How does it work? Never seen one before.

.

Mark,

[as mentioned above]

Edit: for those who may not be familiar; here is a good note about Diagonal Scales.

MichaelG.

[IanTParticipant @iant]

Always educational Michael – thank you.

IanT

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