| 摘要 |
A mechanical clutch free transmission in which a power input shaft concurrently rotates a rigid sphere and a first gear of a differential, which differential has a second gear. A circumferentially extending sequence of rollers are supported in frictional contact with the sphere by a power transmitting ring that rotates within a tilt ring that may be selectively pivoted about an axis that is normal to the axis of rotation of the sphere. The power transmitting ring has a ring gear secured thereto that by a gear train rotates the second gear of the differential. The first and second gears of the differential engage a pair of idling gears supported on a cross piece connected to the power output shaft of the transmission. When the tilt ring is normal to the axis of rotation of the sphere the sequence of rollers rotate at the same rate as the sphere and the power output shaft rotates at a maximum rate in a positive direction relative to the rate of rotation of the power input. As the control shaft is used to pivot the tilt ring towards the axis of rotation of the sphere the rate of rotation of the power transmitting ring decreases as does that of the second gear relative to the first gear, with the rate of rotation of the power output shaft in a positive direction decreasing, then becoming stationary, and then starting to increase in a negative direction.
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