When I worked around paper mills, some of the moter bases used something like that. Seems like it was on the winder and rewinder motor bases, but cant remember for sure. I wonder if it could be used with the Corbin swedger for making gas checks?
Molɔ̀ːn Labé Grandpa:the road to hell is paved with good intentions. Dad:son you have 2 choices for supper eat or don't eat.