Automatic power transmission control

Claim 1

IN AN AUTOMATIC CONTROL SYSTEM FOR A MULTIPLE SPEED, POWER TRANSMISSION MECHANISM HAVING A SYSTEM OF PLANETARY GEAR ELEMENTS DEFINING A POWER DELIVERY PATH BETWEEN A DRIVING MEMBER AND A DRIVEN MEMBER, MEANS FOR CONTROLLING THE RELATIVE MOTION OF SAID GEAR ELEMENTS INCLUDING A FIRST FLUID PRESSURE OPERATED CONTROL ELEMENT THAT IS ACTUATED DURING SAID TORQUE DELIVERY THROUGH SAID SYSTEM IN ONE DIRECTION, A SECOND FLUID PRESSURE OPERATED CONTROL ELEMENT THAT IS ACTUATED DURING TORQUE DELIVERY THROUGH SAID SYSTEM IN THE OPPOSITE DIRECTION, A SOURCE OF FLUID PRESSURE, CONDUIT STRUCTURE INTERCONNECTING SAID PRESSURE SOURCE AND SAID CONTROL ELEMENTS, A PRESSURE DISTRIBUTION VALVE SITUATED IN AND PARTLY DEFINING SAID CONDUIT STRUCTURE, SAID DISTRIBUTION VALVE BEING MOVABLE AUTOMATICALLY BETWEEN ONE OPERATING POSITION AND ANOTHER UPON A CHANGE IN THE DIRECTION OF DELIVERY OF TORQUE THROUGH THE SYSTEM TO RESPECTIVELY DISTRIBUTE FLUID PRESSURE TO SAID FIRST CONTROL ELEMENT WHILE EXHAUSTING SAID SECOND CONTROL ELEMENT AND TO DISTRIBUTE FLUID PRESSURE TO SAID SECOND CONTROL ELEMENT WHILE EXHAUSTING SAID FIRST CONTROL ELEMENT, SPEED GOVERNOR MEANS DRIVABLY COUPLED TO SAID DRIVEN MEMBER FOR ESTABLISHING A CONTROL PRESSURE SIGNAL PROPORTIONAL IN MAGNITUDE TO THE SPEED OF SAID DRIVEN MEMBER, PRESSURE PASSAGE MEANS FOR SUBJECTING SAID DISTRIBUTION VALVE TO SAID PRESSURE SIGNAL FOR URGING THE LATTER TOWARD ONE OPERATING POSITION, AND MEANS CONTINUOUSLY BIASING SAID DISTRIBUTION VALVE TOWARD THE OTHER OPERATING POSITION.