CONDITION RESPONSIVE MEANS TO VARY CONTACT PRESSURE:
(under the class definition) Subject matter including means to sense a condition or change of conditions in the environment of said friction gear transmission; and, in response to such sensing, said means act to increase pressure of frictional contact between said rotary motion transmitting parts. [figure] [caption] A ring roller is mounted on an input shaft by a left-hand thread so that when the shaft is rotated in the clockwise direction the sun roller tends to unscrew along the shaft. The sun roller thus drives planet rollers axially along the shafts on which they are rotatably supported into a ring roller which is mounted on an output shaft by a left-hand thread so that it tends, upon being driven in a counter-clockwise direction by the planet rollers, to screw onto the output shaft. The axial movement of the sun roller ceases upon a suitable preloading between the sun, planet, and ring rollers' being established.
SEE OR SEARCH THIS CLASS, SUBCLASS:
37, 41 and 48, for other condition responsive pressure
variation in specific kinds of friction gearing.
SEE OR SEARCH CLASS
475, Planetary Gear Transmission Systems or Components,
195, for torque responsive means to vary contact pressure in a planetary friction transmission.