Friction plate clutch

Claim 1

A CLUTCH COMPRISING A HUB AND A ROTARY PART, FRICTION PLATES RESPECTIVELY CONNECTED TO THE HUB AND TO THE ROTARY PART AND SHIFTABLE BETWEEN ENGAGED AND RELEASED POSITIONS, A BACK PLATE FIXED ON THE HUB, A PRESSURE PLATE FOR ENGAGING THE FRICTION PLATES AGAINST THE BACK PLATE, AND ACTUATING MECHANISM POSITIONED WITH THE PRESSURE PLATE BETWEEN IT AND THE BACK PLATE AND COMPRISING A COLLAR COAXIAL WITH AND MOVABLE TOWARDS AND AWAY FROM THE HUB, AND A PLURALITY OF TOGGLE LEVER MEANS CIRCUMFERENTIALLY SPACED AROUND THE AXIS OF THE CLUTCH, EACH TOGGLE LEVER MEANS INCLUDING A LEVER AND A LINK RESPECTIVELY PIVOTED AT ONE END ON THE HUB AND COLLAR AND HAVING PIVOTAL ATTACHMENT WITH EACH OTHER AT THEIR OPPOSITE ENDS, RESPECTIVELY, THE PIVOTAL ATTACHMENT OF EACH LEVER TO THE ASSOCIATED LINK BEING POSITIONED RADIALLY INWARD OF THEIR RESPECTIVE PIVOTAL CONNECTIONS WITH THE HUB AND COLLAR IN ENGAGED AND RELEASED POSITIONS OF THE CLUTCH, AND SEPARATE SHOULDER AND NOSE PARTS ON EACH LEVER POSITIONED RADIALLY INWARD OF THE PIVOT CONNECTION THEREOF WITH THE HUB FOR RESPECTIVELY SHIFTING THE PRESSURE PLATE TO ENGAGED AND RELEASED POSITIONS WHEN THE COLLAR IS MOVED TOWARDS AND AWAY FROM THE HUB, THE COLLAR HAVING A LIMITING POSITION IN CONTACT WITH THE HUB TO DETERMINE A SELF-LOCKED CONDITION OF THE TOGGLE LEVER MEANS WHEN THE CLUTCH IS ENGAGED AND CENTRIFUGAL FORCE ACTING ON THE TOGGLE LEVER MEANS EFFECTING AN ACCELERATED RELEASE OF THE CLUTCH WHEN THE SELF-LOCKED CONDITION OF THE TOGGLE LEVER MEANS IS BROKEN.