Square of Thales

[Lurker]

I was talking to a friend ( who incidentally has an engineering degree) about erecting a workshop he has ordered.
You need a square of Thales says I.
Never heard of it says he
Difficult to explain in a few words so we googled.
The AI thingy on the top refers almost immediately to Steve’s u tube and most of the following references can be traced back to the same source.
Friend is impressed saying , it’s obvious when you think about it, but I’ve never come across that before, how did you find it?
He’s a friend of mine, I say nonchalantly

 

[Mike G]

He’s a friend of mine, I say nonchalantly

But he's been dead for two and a half thousand years.

 

[Lurker]

But he's been dead for two and a half thousand years.

Not THAT one I meant the u tube bloke

 

[Steve Maskery]

Thank you, Lurker. It's been a crap few days and that made me laugh.
And some days I do feel as if I've been dead for two-and-a-half-thousand years...
S

 

[Steve Maskery]

And just for the Bots...

 

[Just4fun]

Funnily enough I had a short time spare in the workshop last month and made one of these after watching the video. Not sure why as I have no immediate use for it, but I found it interesting.

 

[Woodbloke]

Funnily enough I had a short time spare in the workshop last month and made one of these after watching the video. Not sure why as I have no immediate use for it, but I found it interesting.

Same here. Interesting bit of kit but I've never yet used mine - Rob

 

[Doug]

Made one about 5 years ago great for shuttering for foundations & setting out lines for starting corners on brickwork

 

[Mike G]

Made one about 5 years ago great for shuttering for foundations & setting out lines for starting corners on brickwork

View attachment 54082

.....which works great if your lines are at the same level! Mine never seem to work that way.

 

[Steve Maskery]

Can I suggest to anyone who is thinking of making one of these that you make the points long and slender rather than short and fat. That way you will have greater degree of movement, which is handy if you have something tall but narrow, such as a cabinet, to square up.

 

[Mike G]

Can I suggest to anyone who is thinking of making one of these that you make the points long and slender rather than short and fat. That way you will have greater degree of movement, which is handy if you have something tall but narrow, such as a cabinet, to square up.

......and can I suggest that you make and fit the short arm first, and then use it to bring the long arms to their final length. And avoid having any slop in the pivot.

 

[AndyT]

Here's mine getting used, back in March this year

 

[Lons]

Made one about 5 years ago great for shuttering for foundations & setting out lines for starting corners on brickwork

It would never have crossed my mind to use one for brickwork. I always used the 3,4,5 method which is quick, easy and accurate.

 

[Woodbloke]

This is my SofT:



....together with another very 'handy' widget which appears to be a Golden Ratio gauge, again which I've never used...but ought to. It was sent to me by somebody a long time ago from a galaxy far far away - Rob