Mechanical control by cable with automatic adjustment

Claim 1

A mechanical control by a cable sliding in a sheathing conduit, comprising an automatic adjustment device including a releasable locking device interconnecting selectively and firmly together during actuation of the mechanical control an outer ferrule structure and an inner ferrule structure which is fixed firmly to one end of the conduit and housed telescopically in the outer ferrule structure, the ferrule structures biased axially apart relative to one another, the locking device comprising disengageable, radially expandible locking means arranged between the inner and outer ferrule structures and adapted for cooperation with a cam surface formed on one of said ferrule structures and movable between a locked position interconnecting firmly together the ferrule structures and an unlocked position under the action of a control member engaging frictionally the cable, said locking means comprising at least one jaw structure having externally at least one tooth to cooperate with indentations formed in an inside wall of the outer ferrule structure, and having internally a ramp surface to cooperate with said cam surface which is formed on the inner ferrule structure, the jaw structure carried by a cage surrounding the inner ferrule structure and associated with the control member, the inner ferrule structure being an end body of enlarged diameter having a portion with an external conical surface forming said cam surface, and the control member formed integral with the cage.