Ratio control for toroidal transmission

Claim 1

A VARIABLE SPEED TRANSMISSION COMPRISING CO-AXIAL INPUT AND OUTPUT MEMBERS HAVING FACING TORIC SURFACES, A PLURALITY OF CIRCUMFERENTIALLY-SPACED ROLLERS DISPOSED BETWEEN AND IN DRIVING CONTACT WITH SAID SURFACES FOR TRANSMITTING TORQUE FROM THE INPUT MEMBER TO THE OUTPUT MEMBER, SUPPORT MEANS FOR EACH ROLLER INCLUDING PIVOT MEANS PROVIDING FOR SPEED-RATIO-CHANGING PIVOTAL MOVEMENT OF SAID ROLLER ACROSS SAID TORIC SURFACES, EACH ROLLER SUPPORT MEANS ALSO INCLUDING MEANS PROVIDING FOR MOVEMENT OF ITS ROLLER IN A SECOND MODE IN RESPONSE TO CHANGES IN THE TRACTION FORCES BETWEEN SAID ROLLER AND SAID TORIC SURFACES SUCH THAT IN RESPONSE TO MOVEMENT IN SAID SECOND MODE SAID SPEED-RATIO-CHANGING PIVOTAL MOVEMENT OF THE ROLLER IS INITIATED, CONTROL MEANS INCLUDING A SOURCE OF FLUID PRESSURE OPERATIVELY CONNECTED TO EACH ROLLER SUPPORT MEANS FOR APPLYING A FLUID PRESSURE FORCE THERETO FOR CONTROLLING MOVEMENT OF EACH ROLLER IN ITS SAID SECOND MODE THEREBY DETERMINING THE SPEED-RATIO POSITION OF SAID ROLLERS, AND MEANS OPERATIVELY CONNECTED TO SAID CONTROL MEANS FOR AUTOMATICALLY VARYING SAID FLUID PRESSURE FORCE IN RESPONSE TO MOVEMENT OF SAID ROLLERS IN SAID SECOND MODE.