Marine turbine drive system

Claim 1

A MARINE PROPULSION SYSTEM COMPRISING A PRIME MOVER HAVING A ROTARY FREE POWER TURBINE DRIVING AN OUTPUT SHAFT AND A THROTTLE FOR CONTROLLING THE APPLICATION OF FLUID UNDER PRESSURE TO SAID TURBINE TO CAUSE ROTATION THEREOF, A BRAKE ON SAID OUTPUT SHAFT, A PROPELLER, A FORWARD-REVERSE TRANSMISSION DRIVEN BY SAID OUTPUT SHAFT AND POSITIONED BETWEEN SAIMD PROPELLER AND SAID BRAKE, AND MEANS FOR ENERGIZING SAID BRAKE TO RETARD ROTATION OF SAID OUTPUT SHAFT DURING OPERATION OF SAID PRIME MOVER WITH SAID THROTTLE OPEN, SAID BRAKE COMPRISING A HYDRODYNAMIC BRAKING MECHANISM AND SAID LAST-NAMED MEANS INCLUDING MEANS FOR FILLING SAID BRAKE WITH LIQUID, SAID FILLING MEANS COMPRISING A LIQUID PRIME PUMP DRIVEN BY SAID OUTPUT SHAFT, PUMP INLET MEANS IN THE BOAT BELOW THE WATERLINE, MEANS CONNECTING THE OUTLET OF THE PUMP WITH SAID HYDRODYNAMIC BRAKE AND, MANUALLY CONTROLLED VALVE MEANS CONTROLLING SAID OUTLETS, SAID LAST-NAMED CONTROL MEANS HAVING TIME DELAY MEANS AUTOMATICALLY CLOSING SAID VALVE MEANS AFTER A PREDETERMINED DELAY AND OPENING A SECOND SOURCE OF LIQUID TO THE INLET OF SAID HYDRODYNAMIC BRAKE.