Abstract: Link mechanism of a mechanical transducer, especially of a toothed amplifying gauge, consisting of an input member performing a rectilinear motion and contacting in a point with one arm of a double-arm lever, the other arm of which remains in point contact with an output lever, characterized in a preferred example in that the mechanism is equipped with a non-linearity compensator of the transmission in the form of an intermediate member, preferably a shaft rigidly mounted on the rotating arm and arranged between a working surface of the double-arm lever and the working surface of the output lever. The arm of the compensator preferably has an arcuate opening through which the axle of the output lever passes, the latter having an arcuate opening through which the axle of the compensator passes. The latter is preferably positioned parallel and in the same plane as the axes of rotation of the double-armed lever and the output lever.