Who might have made this?

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

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

^^ Bumped ^^

[because I think it's interesting]

MichaelG.

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.

Always educational Michael - thank you.

IanT