Straightedge info

[Eric Brown]

Thought I would share this info on straightedges and winding sticks. Eric

135546

135547

[Steve Hamlin]

Interesting, thanks for posting.
There's actually a problem with the scribed line test as described:

The straightedge is ... turned end to end...
This test will only ensure mirrored symmetry of the two halves. An "S" shaped edge would pass the test.

[glenn bradley]

Interesting, thanks for posting.
There's actually a problem with the scribed line test as described:
The straightedge is ... turned end to end...
This test will only ensure mirrored symmetry of the two halves. An "S" shaped edge would pass the test.


It may be the manner of speaking but I'm sure they mean (what I would say as) "flipped on it's long axis". As you say; end to end means something different to me ;-) The method is the same as many of us employ to verify our squares. We just use a known flat edge as a reference. Good stuff.

[Steve Hamlin]

Yep, that's how I do it Glenn.
Alas, the text is quite clear and continues...

... turned end to end so that the mark (A) is in contact with the face of the board at B end.
The referenced picture (FIG. 4 - TESTING A STRAIGHTEDGE) shows the straight edge marked A to the left and the work board marked B to the right - so it does mean end over end, and not like opening a tall thin book (which method works only as well as the stuff is trued.)

[Chuck Nickerson]

Eric - great stuff. But what book is it from? I want the whole book.

[Eric Brown]

I got this from cornishworkshop.co.uk (http://cornishworkshop.co.uk) under galootishgleanings

They apparently are "Scans from 1920's annuals of The Woodworker magazine".

Another one I like is: http://www.fullchisel.com/alburnam2.htm#Plane%20Apps

I hope Sawmill will allow these links. If not, sorry.

Eric