The transmission ratio is set by defining a continuously variable pivoted position of {TAIL ~ the intermediate roller} between the input disk and {HEAD ~ the output disk} 
The transmission ratio is set by defining a continuously variable pivoted position of { TAIL ~ the intermediate roller } between the input disk and { HEAD ~ the output disk }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD