| 主权项 |
1. A transmission for a bicycle, comprising:
(a) a rigid base plate for rotating about a central axis of rotation; (b) a plurality of adjustment glide tracks attached between an outer portion of the rigid base plate and a central portion of the rigid base plate, each of the plurality of adjustment glide tracks comprising at least two locking notches; (c) a plurality of gear segments, each one of the plurality of gear segments having a plurality of teeth for engaging a drive chain, each of the plurality of gear segments being attached to said rigid base plate to allow said plurality of gear segments to slide radially inward and outward along one of the plurality of adjustment glide tracks, and each one of the plurality of gear segments comprising a sliding pin for engaging the one of the plurality of adjustment glide tracks via one of the locking notches; (d) a non-rotating control guide for engaging a sliding pin of each of the plurality of gear segments with one of the plurality of adjustment glide tracks; and (e) a control cable for movement of the non-rotating control guide by an operator of the bicycle, wherein operation of the control cable moves the non-rotating control guide backward or forward for engaging a sliding pin of each of the plurality gear segments, moving each of the plurality of gear segments in a direction toward the outer portion of the rigid base plate or toward the central portion of the base plate and changing an effective radius of a curved path formed by the plurality of gear segments. |
