The Central Florida Aerospace Academy has this antique propeller duplicator.
The linkage on the side twists the axis of the cutter to match the roller
It follows the pattern with a roller.
I suspect the handle that looks like a baseball bat works the tilt.
I think these are style samples, not patterns. It's not as sophisticated as new fangled pantographs.
But it can get go going when your spouse dings the prop on your flying car.