Submergible hull propulsion and control system

Claim 1

A SUBMERGIBLE VESSEL COMPRISING: (A) A SUBSTANTIALLY FIXED PRESSURE CHAMBER HAVING WALLS OF SUFFICIENT STRENGTH TO WITHSTAND ALL DIFFERENTIAL PRESSURES TO WHICH THE CHAMBER MAY BE SUBJECTED; (B) A VARIABLE PRESSURE CHAMBER HAVING WALLS CAPABLE OF WITHSTANDING A DIFFERENTIAL IN PRESSURE LOWER THAN THOSE TO WHICH THE VESSEL IS TO BE SUBJECTED; (C) SAID FIXED AND VARIABLE PRESSURE CHAMBERS BEING CONNECTED TO FORM A UNITARY BODY; (D) POWERPLANT MEANS LOCATED IN SAID FIXED PRESSURE CHAMBER; (E) PROPELLER SHAFT MEANS LOCATED IN SAID VARIABLE PRESSURE CHAMBER AND RESPONSIVE TO SAID POWERPLANT MEANS FOR DRIVING SAID VESSEL THROUGH WATER; (F) A POOL OF LIQUID SUBSTANTIALLY ENTIRELY FILLING SAID VARIABLE PRESSURE CHAMBER; (G) SAID VARIABLE PRESSURE CHAMBER HAVING APERTURE MEANS IN THE WALLS THEREOF; AND (H) VOLUME CHANGING MEANS WATERTIGHTLY SURROUNDING SAID APERTURE AND DISPOSED IN THE INTERIOR OF SAID VARIABLE PRESSURE CHAMBER FOR VARYING THE PRESSURE IN SAID VARIABLE PRESSURE CHAMBER IN RESPONSE TO THE SEA WATER PRESSURE ACTING THROUGH SAID APERTURE MEANS ON SAID VOLUME CHANGING MEANS.