Synchro self-shifting clutch with invertible parts

Claim 1

A SYNCHRONOUS SELF-SHIFTING CLUTCH COMPRISING A FIRST CLUTCH MEMBER, A FIRST RING OF CLUTCH TEETH CARRIED BY SAID FIRST CLUTCH MEMBER, A HELICALLY SPLINED SECOND CLUTCH MEMBER, A HELICALLY SPLINED INTERMEDIATE MEMBER CARRIED BY SAID SECOND CLUTCH MEMBER WITH THE SPLINES OF SAID INTERMEDIATE AND SECOND CLUTCH MEMBER INTERENGAGED, AXIALLY SPACED FIRST AND SECOND STOP MEANS LOCATED TO PERMIT LIMITED HELICAL MOVEMENT OF SAID INTERMEDIATE MEMBER RELATIVE TO SAID SECOND CLUTCH MEMBER, A SECOND RING OF CLUTCH TEETH CARRIED BY SAID INTERMEDIATE MEMBER, THE CLUTCH COMPRISING COACTING MEANS CARRIED RESPECTIVELY BY SAID FIRST CLUTCH MEMBER AND SAID INTERMEDIATE MEMBER AND ADAPTED, WHEN SAIED INTERMEDIATE MEMBER IS AGAINST SAID FIRST STOP MEANS TO PERMIT FREE-WHEELING OF SAID FIRST AND SECOND MEMBERS UPON RELATIVE ANGULAR MOVEMENT THEREOF IN ONE DIRECTION AND TO INITIATE MOVEMENT OF SAID INTERMEDIATE MEMBER INTO A POSITION IN WHICH IT IS IN TOOTHED ENGAGEMENT WITH SAID FIRST CLUTCH MEMBER AND AGAINST SAID SECOND STOP MEANS UPON RELATIVE ANGULAR MOVEMENT OF SAID FIRST AND SECOND CLUTCH MEMBERS IN THE OTHER DIRECTION, AT LEAST ONE OF SAID STOP MEANS BEING FITTED TO THE CLUTCH SO AS TO BE REMOVABLE THEREFROM TO PERMIT SAID INTERMEDIATE MEMBER TO BE REMOVED FROM SAID SECOND CLUTCH MEMBER, SAID RINGS OF CLUTCH TEETH AND COACTING MEANS HAVING DISPOSITIONS IN RELATION TO SAID INTERMEDIATE MEMBER SUCH THAT THE REMOVAL OF AT LEAST THE INTERMEDIATE MEMBER FROM THE CLUTCH AND ITS REPLACEMENT IN AN AXIALLY REVERSED DISPOSITION RELATIVE TO ITS FORMER POSITION PROVIDES A SYNCHRONOUS SELF-SHIFTING CLUCTH IN WHICH WHEN THE INTERMEDIATE MEMBER IS AGAINST SAID SECOND STOP MEANS, SAID COACTING MEANS PERMIT FREEWHEELING IN THE DIRECTION OPPOSITE TO THE FORMER DIRECTION AND INITATE MOVEMENT OF SAID INTERMEDIATE MEMBER INTO A POSITION IN WHICH IT IS IN TOOTHED ENGAGEMENT WITH SAID FIRST CLUTCH MEMBER AND AGAINST SAID FIRST STOP MEANS UPON RELATIVE ANGULAR MOVEMENT OF SAID FIRST AND SECOND CLUTCH MEMBERS IN THE DIRECTION OPPOSITE TO SAID OTHER DIRECTION.