Found this in a lot of T parts years ago, cleaned it up and took a video to show the parts and motion - anyone know what it is, and if it's actually T related?
Agree with Kevin, saw set for cross cut
Just in case you don't know what "saw set" means:
The teeth of a saw, whether hand or circular, rip or crosscut, or even hack for that matter, have to cut a kerf a bit wider than the body of the blade, or the saw will bind up in its own kerf. After sharpening the teeth of a saw, the device you pictured is used to bend every other tooth an adjustable amount, then you turn around and bend the others the other way.
About 10 or 15 years ago, my wife and I went camping in CO. with some good friends of ours. After we got all set up, we went looking for some firewood. My buddy said he had a small bow saw. I started to cut a small branch that was on the ground and just got about a half inch through and it started binding up. When I looked closer, it had no set at all. Yep, it was a Chinese saw. Dave
And it seems we have an answer - and a patent to go with it! Thanks, I actually thought it was for cutting leather or a sheet metal nipper..