Synchronous self-shifting clutches

Claim 1

A SYNCHRONOUS SELF-SHIFTING CLUTCH COMPRISING FIRST AND SECOND ROTARY CLUB PARTS, A FIRST INTERMEDIATE MEMBER, MEANS CONSTRAINING SAID FIRST INTERMEDIATE MEMBER FOR HELICAL MOVEMENT BETWEEN FIRST AND SECOND POSITIONS RELATIVE TO SAID FIRST ROTARY CLUTCH PART, A SECOND INTERMEDIATE MEMBER, MEANS CONSTRAINING SAID SECOND INTERMEDIATE MEMBER FOR HELICAL MOVEMENT BETWEEN FIRST AND SECOND POSITIONS RELATIVE TO SAID SECOND ROTARY CLUTCH PART, A FIRST SET OF CLUTCH TEETH ON SAID FIRST INTERMEDIATE MEMBER, A SECOND SET OF CLUTCH TEETH ON SAID SECOND INTERMEDIATE MEMBER, THE FULLY ENGAGED CONDITION OF THE CLUTCH CORRESPONDING TO FULL INTERENGAGEMENT OF SAID SETS OF CLUTCH TEETH FOR THE TRANSMISSION OF DRIVING TORQUE BETWEEN SAID FIRST AND SECOND CLUTCH PARTS, SAID SETS OF CLUTCH TEETH BEING INTERENGAGEABLE AND DISENGAGEABLE BY RELATIVE AXIAL MOVEMENT OF SAID FIRST AND SECOND INTERMEDIATE MEMBERS, AND THE CLUTCH INCLUDING MEANS OPERATIVE UPON RELATIVE ANGULAR MOVEMENT OF SAID FIRST AND SECOND ROTARY CLUTCH PARTS IN ONE DIRECTION TO EFFECT AT LEAST INITIAL INTERENGAGEMENT OF SAID SETS OF CLUTCH TEETH.