Activated-fin installation on board ships

Claim 1

AN ACTIVATED-FIN SYSTEM FOR SHIPS COMPRISING AT LEAST ONE PAIR OF FINS, ONE FIN ON EITHER BROADSIDE OF THE SHIP, EACH ACTUATED INDIVIDUALLY BY AN ACTUATING MECHANISM CONTROLLED, THROUGH A SERVOAMPLIFIER BY A SIGNAL COMING FROM AN ELECTRIC BRIDGE CONTROL STATION, CHARACTERIZED IN THAT SAID ELECTRIC BRIDGE CONTROL STATION IS FED BY A SIGNAL GENERATED BY AN APPARATUS RESPONSIVE TO THE HYDRODYNAMIC THRUST ACTING UPON EACH FIN AND BY A SIGNAL TRANSMITTED BY A DEVICE SELECTED FROM A GROUP, COMMON TO ALL OF THE FINS, COMPRISING A DEVICE RESPONSIVE TO THE SHIP''S ROLLING MOTION AND WHOSE ACTUATION CAUSES THE SIMULTANEOUS OPPOSITE MOVEMENT OF THE FINS FOR STABILIZING THE SHIP, A DEVICE WHOSE ACTUATING CAUSES THE UPWARD ROTATION OF THE FIN PLACED ON THE LEFT-HAND BROADSIDE OF THE SHIP AND THE SIMULTANEOUS INACTIVATION OF THE FIN PLACED ON THE RIGHT-HAND BROADSIDE OF THE SHIP, A DEVICE WHOSE ACTUATION CAUSES THE UPWARD ROTATION OF THE FIN PLACED ON THE RIGHT-HAND BROADSIDE OF THE SHIP AND THE SIMULTANEOUS INACTIVATION ON THE FIN PLACED ON THE LEFT-HAND BROADSIDE, AND A DEVICE, WHOSE ACTUATION CAUSES THE SIMULTANEOUS ROTATION IN THE SAME DIRECTION OF BOTH FINS OF THE PAIR, CONTROL MEANS BEING PROVIDED FOR THE SELECTIVE ACTUATION OF EACH OF THE DEVICES AFORESAID.