Check this out: http://homepage.ntlworld.com/scrumpy/cider/press3.htm
It looks quite similar to what my great uncle used to use for his scrumpy production but a bit smaller, I wouldn't mess around with any hand powered presses, you just can't generate the neccessary power to do a particularly effective job with them. Make sure you try a glass full of the apple juice as it's being squeezed, it's easily the nicest soft drink on the planet!