Reversible marine propulsion system

Claim 1

A MARINE PROPULSION SYSTEM FOR OPERATING THE PROPELLER OF A VESSEL HAVING A STACK, SAID SYSTEM COMPRISING A GAS TURBINE ENGINE ROTATING AT A CONSTANT RATE IN ONE DIRECTION AND MOUNTED VERTICALLY INSAID VESSEL FOR GAS EXHAUST INTO SAID STACK, A PLANETARY GEAR ASSEMBLY, MEANS INCLUDING A PRIMARY INPUT SHAFT EXTENDING AT RIGHT ANGLES TO THE VERTICAL AXIS OF SAID ENGINE COUPLING SAID ENGINE TO ONE INPUT OF SAID ASSEMBLY, A SECONDARY POWER SOURCE OPERATIVELY COUPLED TO SAID ENGINE AND INCLUDING ADJUSTABLE MEANS TO PRODUCE AN OUTPUT WHOSE SPEED VARIES FROM ZERO TO A SPEED CORRESPONDING TO SAID CONSTANT SPEED, MEANS INCLUDING A SECONDARY INPUT SHAFT COUPLING SAID SECONDARY SOURCE TO ANOTHER INPUT OF SAID PLANETARY GEAR ASSEMBLY TO PRODUCE AN OUTPUT WHOSE DIRECTION AND SPEED MAY BE VARIED IN ACCORDANCE WITH SAID ADJUSTMENT OF SAID SECONDARY SOURCE, AND AN OUTPUT SHAFT COUPLING SAID ASSEMBLY TO SAID PROPELLER.