Overload clutch or torque limiting device

Claim 1

AN OVERLOAD CLUTCH COMPRISING (A) A DRIVING CLUTCH MEMBER; (B) A DRIVEN CLUTCH MEMBER, SAID MEMBERS BEING ROTATABLE ABOUT A COMMON AXIS AND HAVING (C) OPPOSED PLANE FACES, SAID FACES DEFINING (D) TWO LIKE SETS OF BALL RECEIVING BORES, ALL OF SAID BORES HAVING THE SAME RADIAL DISTANCE FROM SAID AXIS AND SAID SETS OF BORES BEING IN REGISTER WITH ONE ANOTHER IN ONE RELATIVE ROTATIONAL POSITION OF THE TWO CLUTCH MEMBERS; (E) A PLURALITY OF TORQUE TRANSMITTING BALLS EACH OF A DIAMETER GREATER THAN THE DIAMETER OF SAID BALL RECEIVING BORES AT SAID FACES; (F) MEANS YIELDINGLY URGING SAID OPPOSTED FACES TOWARDS ONE ANOTHER WHEREBY SAID BALLS ARE IN TORQUE TRANSMITTING ENGAGEMENT WITH TWO REGISTERING ONES OF SAID BORES WHEN THE TWO SETS OF BORES ARE IN SAID ONE RELATIVE ROTATIONAL POSITION; (G) A BALL RETAINING MEANS ROTATABLE WITH ONE OF SAID CLUTCH MEMBERS AND ARRANGED BETWEEN SAID OPPOSED FACES, SAID BALL RETAINING MEANS DEFINING (H) A PLURALITY OF BALL RETAINING SLOTS, SAID SLOTS EACH HAVING ONE PART AT THE SAME RADIAL DISTANCE FROM SAID AXIS AS SAID BORES AND ANOTHER PART AT A DIFFERENT RADIAL DISTANCE FROM SAID AXIS WHEREBY SAID OTHER PART OF THE SLOTS IS OUT OF REGISTER WITH THE BORES AT ALL RELATIVE ROTATIONAL OSITIONS OF THE CLUTCH MEMBERS, AND SAID BALLS BEING FREELY ADVANCEABLE ALONG SAID SLOTS WHEN THE BALLS ARE OUT OF TORQUE TRANSMITTING ENGAGEMENT WITH SAID BORES.