Rotary clutches

Claim 1

A ROTARY TOOTHED CLUTCH COMPRISING A FIRST ROTARY CLUTCH MEMBER AND A SECONDARY CLUTCH MEMBER, AN INTERMEDIATE MEMBER, MEANS CONSTRAINING SAID INTERMEDIATE MEMBER FOR HELICAL MOVEMENT RELATIVE TO SAID SECOND CLUTCH MEMBER IN ONE HELICAL DIRECTION TO ENGAGE THE CLUTCH TEETH AT LEAST PARTIALLY AND IN THE OTHER HELICAL DIRECTION TO DISENGAGE SAID CLUTCH TEETH, THE APPLICATION OF DRIVING TORQUE TO THE CLUTCH IN ONE ANGULAR DIRECTION, WITH SAID CLUTCH TEETH ENGAGED, TENDING TO DISENGAGE SAID CLUTCH TEETH BY RELATIVE HELICAL MOVEMENT OF SAID INTERMEDIATE MEMBER IN SAID OTHER HELICAL DIRECTION, CLUTCH LOCKING MEANS ADJUSTABLE, WITH THE CLUTCH ENGAGED, TO AN OPERATIVE SETTING IN WHICH SAID LOCKING MEANS OPPOSE SAID RELATIVE HELICAL MOVEMENT OF SAID INTERMEDIATE MEMBER IN SAID OTHER HELICAL DIRECTION, WHEREBY DISENGAGEMENT OF THE CLUTCH UNDER THE ACTION OF DRIVING TORQUE IS OPPOSED BY A LOADED CONDITION OF SAID LOCKING MEANS THAT OPPOSE ADJUSTMENT OF SAID LOCKING MEANS OUT OF SAID OPERATIVE SETTING, AND THE CLUTCH INCLUDING LOAD RELIEF MEANS ENERGIZABLE FROM A CONTROLLABLE POWER SOURCE TO URGE SAID INTERMEDIATE MEMBER IN SAID ONE HELICAL DIRECTION WHEN THE CLUTCH IS ENGAGED, WHEREBY TO RELIEVE SAID LOCKING MEANS FROM SAID LOADED CONDITION AND THEREBY ENABLE SAID CLUTCH LOCKING MEANS TO BE ADJUSTED OUT OF SAID OPERATIVE SETTING, SO THAT THE CLUTCH IS DISENGAGEABLE UNDER THE ACTION OF DRIVING TORQUE WHEN SAID LOAD RELIEF MEANS CEASE TO BE ENERGIZED.