Patent #2,463,743 for a hydrogen tube designed by H. Howard Cary and Warren Baxter during their time at National Technical Labs, a precursor to Beckman Instruments. This tube was designed for use in UV spectrophotometers to provide a consistent source of ultraviolet radiation. It improved on previous designs by being smaller, but avoiding the problems with decreased tube life that usually accompanied a decrease in size.
Cary, H. Howard (Henry Howard), and Warren P. Baxter. “Patent for Hydrogen Tube,” March 8, 1949. Beckman Historical Collection, Box 19, Folder 22. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/br86b4380.