Variable pitch propeller

Claim 1

A VARIABLE PITCH PROPELLER COMPRISING; A HUB, BLADE MEANS SUPPORTED ON AND EXTENDING RADIALLY FROM THE HUB AND BEING ROTATABLE ON THE HUB FOR CHANGING THE BLADE PITCH, MEANS OPERABLE DURING ROTATION OF THE PROPELLER FOR URGING THE BLADE MEANS TOWARD REDUCED PITCH POSITION, FLUID MOTOR MEANS CARRIED BY THE HUB OPERABLE IN RESPONSE TO A SUPPLY OF PRESSURE FLUID THERETO FOR URGING THE BLADE MEANS TOWARD INCREASED PITCH POSITION, AND MEANS CARRIED IN ITS ENTIRETY BY THE PROPELLER HUB FOR EFFECTING A CONTROLLED SUPPLY OF PRESSURE FLUID TO SAID FLUID MOTOR MEANS, SAID LAST MENTIONED MEANS INCLUDING A FLUID RESERVOIR, A PUMP HAVING ITS INLET CONNECTED TO SAID RESERVOIR AND HAVING AN OUTLET, A FIRST CIRCUIT CONNECTING SAID OUTLET WITH SAID MOTOR MEANS, A SECOND CIRCUIT CONNECTING SAID OUTLET WITH SAID RESERVOIR INCLUDING THEREIN A PROPELLER SPEED RESPONSIVE GOVERNOR MEANS TO CONTROL THE FLUID FLOW IN SAID SECOND CIRCUIT, AND MEANS OPERATIVELY CONNECTED WITH SAID PUMP AND ARRANGED AT THE NOSE END OF SAID PROPELLER OPERATIVE FOR EFFECTING ACTUATION OF SAID PROPELLER IN RESPONSE TO ROTATION OF SAID PROPELLER, SAID GOVERNOR MEANS COMPRISING A CONTROL SPRING, A CAM ASSOCIATED WITH SAID SPRING MOVABLE FOR ADJUSTING THE BIAS OF THE SPRING THEREBY TO ADJUST THE CONTROL SPEED OF THE PROPELLER, AND MEANS SENSITIVE TO THE SPEED OF THE PROPELLER THROUGH THE AIR FOR ADJUSTING SAID CAM.