Abstract: An automatic transmission is provided in which the torque from the motor is converted and coupled to the load via n (typically n=3) intermediate mechanisms, each delivering power to the load with a constant phase difference of .phi.=360.degree./n between successive deliveries. Three different intermediate mechanisms consisting of springs, springs and a crankshaft, and levers with variable lever arms are provided. These systems have no frictional or hydraulic or other dissipative clutch mechanisms, and are regenerative in that power not delivered to the load goes back to the motor. Also, there are no discrete gears, and as the torque required by the load varies, the torque conversion is accomplished automatically and continuously as if an infinite number of gears were provided. The system also has infinite gear ratio capability in reverse as well as in forward direction.