Working in a university fabrication workshop today, and they've got an unusual bench shear or notching machine. With a lever mechanism similar to a typical bench shear, but the blade descends between two edges so rather than a normal shearing action it takes out a strip of waste maybe 4mm wide up to 100mm long leaving the surrounding metal flat. The workshop people simply refer to it as a slotting or notching machine, but my Google-fu fails me in identifying it. Anyone identify it?