Using a slider crank opposite to the conventional sense, (ie, input to the slider and output obtained at the crank) should do the job. This should help you : http://www.youtube.com/watch?v=PZO-BhkWIMM
The most common means is by use of a spiral. Think of a long screw and a nut. If you keep the nut in one position and you rotate the screw threaded into the nut...the screw will move up or down as...
there are three ways something can move:
translational -- like my car going down the road
vibrational -- like a slinky or spring
rotational -- like a baton that twirls end over end.
When...