Ride my see saw

I picked this little beauty up at the flea market. It was the swing arm for a banker's style lamp. I hope to use this as my see-saw multiplier.

Let me explain.

I connect the crank wheel to one end of this see-saw and connect the reciprocating shaft to the other. If I set the pivot point in the middle then when the crank moves an inch the rod, in turn, will be moved an inch. If I move the pivot point closer to the crank end then I start to get a multiplier effect. Like leverage but in reverse. As I move the pivot point in this direction the rod will go a greater distance for every inch the crank moves. The negative effect of all of this is that being on the short end of a lever means you have to work harder. So I hope my motor, which I haven't even gotten yet, will be up to the challenge.

All this will be more clear when I put it into practice. Could it be less clear?