Name of the Inventor of the first submarine inventor?

Answer 1

1580 The first published prescription for a submarine came from the pen of WILLIAM BOURNE, an English innkeeper and scientific dilettante. Bourne first offered a lucid description of why a ship floats - by displacing its weight of water -- and then described a mechanism by which: 'It is possible to make a Ship or Boate that may goe under the water unto the bottome, and so to come up again at your pleasure. [If] Any magnitude of body that is in the water . . . having alwaies but one weight, may be made bigger or lesser, then it Shall swimme when you would, and sinke when you list . . . .' In other words, decrease the volume to make the boat heavier than the weight of the water it displaces, and it will sink. Make it lighter, by increasing the volume, and it will rise. He wrote of watertight joints of leather, and a screw mechanism to wind the volume-changing "thing" in and out. Bourne was describing a principle, not a plan for a submarine, and offered no illustration.