Abstract: An alternator rotor for use in an internal combustion engine having a primary rotated crank shaft. The alternator rotor comprises generally cylindrical rotor housing and a balancing member secured to the rotor housing. The rotor housing is mountable to the crank shaft of the internal combustion engine such that rotation of the crank shaft causes rotation of the rotor housing along an axis of rotation generally parallel to the axis of rotation of the crank shaft. The balancing member includes a moveable mass that is capable of movement generally about the axis of rotation of the rotor housing in response to the rotation of the rotor housing such that upon rotation of the rotor housing the moveable mass moves about the axis of rotation of the rotor housing in response to the both the centrifugal force applied to the moveable mass and to the unbalanced forces generated by rotation of the engine.

Abstract: A process is provided for recovering silver and plastics material from photographic film. For exposed film, film is shredded or chopped, subjected to bleach treatment, washed, and subjected to fixing treatment, the fixing solution being circulated in closed circuit through an electrolytic silver recovery plant in which silver is deposited on one or more cathodes. For unexposed film, the bleach and washing steps can be omitted. For high silver recovery, the main fixing treatment is followed by a tailings treatment in fix solution, the tailings solution being circulated through a separate silver recovery unit of lower capacity and lower power. To maintain the fixing solution pH, a first wash in plain water is followed, before fixing, by a second wash in water treated with an alkaline chemical to raise its pH.