A variable gear assembly has a cam gear with a plurality of teeth of varying size and configuration, and a rotatably mounted roller gear has {HEAD ~ a plurality} of {TAIL ~ rollers} for meshing engagement with the teeth 
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A variable gear assembly has a cam gear with a plurality of teeth of varying size and configuration , and a rotatably mounted roller gear has { HEAD ~ a plurality } of { TAIL ~ rollers } for meshing engagement with the teeth
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH