Abstract: A device which automatically eliminates play due to wear of a motor vehicle clutch by the engagement, during a working stroke, of a pawl carried by a control arm with teeth on an intermediate member and subsequent disengagement of said pawl upon return of the control arm to its rest position, due to the abutment of a first stop, carried by a connecting arm, with a second stop, which allows a release spring to disengage the pawl, thereby allowing the intermediate member to assume a play-eliminating position prior to the next working stroke.

Abstract: A device for automatically compensating for wear in a friction clutch of the kind which is released by a pedal-operated control lever acting on a cable through an intermediate element articulated to the control lever, has a toothed sector on the intermediate element which meshes with a pinion carried by structure which is pivoted on the intermediate element about the axis of the toothed sector. When the control lever is depressed to disengage the clutch the pinion is engaged by a stop surface which prevents rotation of the pinion, so that the intermediate member moves with the control lever; when the control lever returns to its rest position, however, the stop surface disengages from the pinion, allowing the latter to rotate, so that the intermediate member can assume a new position relative to the control lever, thereby taking up wear in the clutch.

Abstract: A control lever mechanism which operates to provide a different mechanical advantage at different points in the range of movement of a main operating control member and in dependence on the force applied to, and the force of resistance to the movement of, the main control member is disclosed. The main control lever is pivoted to a fixed fulcrum and linked to a force transmission member by a second pivot forming a fulcrum which is movable along an arcuate path closer to or further away from the fixed fulcrum. When both the fixed fulcrum and the movable fulcrum lie on the same side of the line of action of the force transmission member a component of the applied force tends to move the movable fulcrum towards the fixed fulcrum to increase the mechanical advantage of the control lever.