Gear selector with predetermined developments, particularly for bicycles.

摘要

Selector (1) speeds with predetermined developments, in particular bicycle, for control cables (3, 4), from a grip (2) rotating one of gearshifts (5, 6) respectively associated with a elastic return means, such as a spring, said selector (1) comprising, housed inside a box (18), at least two mechanisms (7, 8) operating cable, one (7) for operating the cable (3) of the gear change (5) forward or exchanger plates, and the other (8) for operating the cable (4) of the gearshift (6) posterior or changer pinions and this second mechanism (8) , integral in rotation with the handle (2), suitable for causing, when a rotation of the handle (2) in one sense a loose or a subsequent shot of the cable (4), wherein the rotating assembly formed takes place by at least by the mechanism (8) for operating the cable (4) back and the handle (2) it is engageable in r otation intermittently to the mechanism (7) for operating the cable (3) forward changer (5) of plates, and this mechanism (7) for operating the cable (3) forward, in coupled condition appropriate to cause, in depending on the direction of rotation of the handle (2), a pulled or slackened cable (3) forward changer (5) of plates.