Chest portion of an iron lung devised by Charles E. H. Armbruster (1868-1920), a homeopathic physician and proprietor of Armbruster’s Optical Establishment in Denver, Colorado.
Ref: Charles E. H. Armbruster, “System for the Treatment of Diseases of the Human Body by Vacuum or Air-Pressure,” U.S. Patent 1,172,660 (Feb. 22, 1916).
Charles E. H. Armbruster, “Mechanism for Controlling the Flow of Fluid To and From an Air-Tight Chamber,” U.S. Patent 1,172,661 (Feb. 22, 1916).
Charles E. H. Armbruster, “Casing for Producing an Air-Tight Chamber Over or Around a Portion of the Human Body,” U.S. Patent 1,172,662 (February 22, 1916).