1928 Drinker Respirator.

The Drinker Respirator ie, ’The Iron Lung’ ,often referred to in the early days as the “Drinker respirator”, was invented by Philip Drinker (1894–1972) and Louis Agassiz Shaw, Jr., professors of industrial hygiene at the Harvard School of Public Health.The machine was powered by an electric motor with air pumps from two vacuum cleaners. The air pumps changed the pressure inside a rectangular, airtight metal box, pulling air in and out of the lungs.

1928 The Iron Lung – Drinker Respirator