17th – 18th century diving suits
Modern suits
diving explorations found on internet
In 1834, the first U.S. patent for a practical underwater diving suit was issued to Leonard Norcross of Dixfield, Maine (No. X8255).* Calling it a “Diving Armor,” he designed an airtight leather outfit with a brass helmet connected via a rubber hose to an air bellows pump on a boat. http://todayinsci.com/6/6_14.htm Image source: USPTO
Underwater diving designs from 17th-18th century. Diving bell of Dr. Edmond Halley (1680), diving bell of Charles Spalding (1787), Marten Triewald’s diving bell (1741). http://longstreet.typepad.com/thesciencebookstore/2012/07/underwater-cyborg-diving-suit.html