births
Charles Momsen, American admiral, invented the Momsen lung (died 1967)
Related Wikipedia articles
Charles Momsen
US Navy admiral, submarine rescue (1896–1967)
Charles Bowers Momsen, nicknamed "Swede", was born in Flushing, New York. He was an American pioneer in submarine rescue for the United States Navy, and he invented the underwater escape device later called the "Momsen lung", for which he received the Navy Distinguished Service…Source: Wikipedia (CC BY-SA)
Momsen lung
Rebreather system for escaping sunken submarines
The Momsen lung was a primitive underwater rebreather used before and during World War II by American submariners as emergency escape gear. It was invented by Charles Momsen, who worked on it from 1929 to 1932. Submariners trained with this apparatus in an 80 ft (24 m) deep…Source: Wikipedia (CC BY-SA)
June 21
Day of the year
June 21 is the 172nd day of the year in the Gregorian calendar; 193 days remain until the end of the year.Source: Wikipedia (CC BY-SA)