Sliding clutch gear

Claim 1

A DRIVE MECHANISM COMPRISING A CLUTCH, DRIVE MEANS AND A SHAFT; SAID CLUTCH COMPRISING A PAIR OF MEMBERS EACH HAVING A TOOTHED SURFACE ADAPTED TO SELECTIVELY COACT IN MESHING INTERENGAGEMENT; ONE OF SAID TOOTHED MEMBERS FORMING A PART OF THE DRIVE MEANS; MEANS SUPPORTING THE OTHER TOOTHED MEMBER FREE FROM ENGAGEMENT WITH THE SHAFT AND FOR RELATIVE AXIAL MOVEMENT DIRECTLY INTO AND OUT OF THE TOOTHED ENGAGEMENT WITH SAID ONE OF SAID TOOTHED MEMBERS; MEANS INDEPENDENT OF SAID OTHER TOOTHED MEMBER FOR COUPLING THE DRIVE MEANS WITH THE SHAFT; SAID TOOTHED MEMBERS COACTING INDEPENDENTLY OF THE SHAFT WHEN ENGAGED AND DISENGAGED RESPECTIVELY TO CHANGE THE DRIVE RELATIONSHIP BETWEEN THE DRIVE MEANS AND THE SHAFT; THE TEETH ON EACH OF SAID MEMBERS HAVING CHORDAL WIDTHS ADAPTED TO COACT IN MESHING ENGAGEMENT TO RESTRAIN RELATIVE ROTATION BETWEEN THE TEETH; THE MATING AXIAL END FACES ON THE TEETH OF SAID TOOTHED MEMBERS ADJACENT EACH OTHER, WHEN NOT IN MESHING ENGAGEMENT, BEING INCLINED IN PARALLEL PLANES AT SUBSTANTIALLY THE SAME ANGLE WITHIN 30 TO 40 DEGREES TO THE AXIS OF ROTATION OF SAID TOOTHED MEMBERS, SAID MATING AXIAL END FACES INDEPENDENTLY COACTING TO SYNCHRONIZE AND THEREBY FACILITATE THEIR MESHING ENGAGEMENT.