sentences:  The first iron lung used in the treatment of polio victims was invented by Philip Drinker, Louis Agassiz Shaw, and James Wilson at Harvard, and tested October 12, 1928, at Children's Hospital, Boston.The original Drinker iron lung was powered by an electric motor attached to two vacuum cleaners, and worked by changing the pressure inside the machine.When the pressure is lowered, the chest cavity expands, trying to fill this partial vacuum.