If I remember to take my old Canon camera with me when I go to my brother next week I´ll take a photo of his Splitting machine.
It´s a bench on 3 legs, in one end there is a wheel Ø 5´ for a belt. The speed is 50-100 rpm. On the axle there is a crank, pulling/pushing a horizontal knife in the other end. He place a piece of wood, usally spruce, on the bench and the knife split it. You have to turn the small log right all the time to get a good product.
We use to make them 18-20" and 1/8" thick. Making a good roof we nail them in 4 layers and turn them so the water want to flow off, not flow into the wood.
This machine is all made of wood, I think, and looks very old.
Swede.