Speed-lock-nut

Claim 1

A LOCK-NUT COMPRISING A BODY HAVING AN AXIAL UNTHREADED CYLINDRICAL BORE AND A FRONT AND REAR FACE, SAID BODY HAVING A SEGMENTAL GROOVE RUNNING AXIALLY THEREOF AND OPENING INTO SAID BORE, SAID GROOVE HAVING A BOTTOM WALL SLANTING RADIALLY OUTWARDLY FROM SAID FRONT FACE TO SAID REAR FACE, THE LATERAL WALLS OF SAID GROOVE EACH TEMPERING TOWARDS SAID FRONT FACE, SAID LATERAL WALLS CONVERGING TRANSVERSELY IN THE GENERAL RADIAL DIRECTION TOWARDS THE AXIS OF THE BORE IN DOVETAIL FASHION, THE LONGITUDINAL EDGES OF SAID GROOVE DEFINED BY SAID LATERAL WALLS AND THE SURFACE OF SAID BORE BEING SUBSTANTIALLY STRAGHT AND CONVERGING LONGITUDINALLY AXIALLY OF SAID BORE TOWARDS SAID REAR FACE OF SAID NUT BODY, A WEDGING INSERT, SHORTER IN LENGTH THAN SAID GROOVE AND SLIDABLY RECEIVED THEREIN, HAVING A REAR AND A FRONT FACE, AN ARCUATE SCREW-THREADED RADIALLY INNER FACE, A RADIALLY OUTER FACE MAKING A RADIAL INCLUDED ANGLE WITH SAID THREADED FACE, AND FLAT SIDE FACES WHICH CONVERGE RADIALLY IN THE DIRECTION OF SAID THREADED FACE AND LONGITUDINALLY AXIALLY OF THE INSERT TOWARDS THE REAR FACE THEREOF, THE SIDE FACES AND RADIALLY OUTER FACE OF SAID INSERT BEING GENERALLY PARALLEL TO AND CONFORMING TO THE LATERAL WALLS AND BOTTOM WALL OF SAID GROOVE AND THE SCREW-THREADED RADIALLY INNER FACE OF SAID INSERT BEING A PORTION OF A CYLINDRICAL SURFACE SUBSTANTIALLY PARALLEL TO THE CYLINDRICAL SURFACE OF SAID BORE.