hinges used in 4-fold rulers?

[Jeff Ranck]

So you know the hinges used in 4-fold rules? What are they called? I'm going to make a sector out of an old 4-fold rule, but I was wondering if you could buy the brass hinges and what type of hinge they are. Weird, but I've never thought to ask what type of hinge it is.

[Jim Koepke]

One is a pinned scissor joint, the other two are folding hinges.

This is from > http://www.walkemooretools.com/disse...-folding-rule/

As to where to buy, that may be answered by another consultation with Dr. Google.

Here is a useful chart for use with a four fold 24" rule:

Stanley Rule Protractor Angles & Distance.jpg

jtk

[Jeff Ranck]

thank you Jim!

[David Dalzell]

You might try "Henderson Hardware" in Fort Bragg, Calif. I don't have their phone number. They make a variety of brass hinges of very good quality. I don't know if they make the specific type of hinges you are looking for.