High-speed-drill chuck with frictiontype coupling

Claim 1

IN A TRANSMISSION FOR THE TRANSFER OF TORQUES, IN COMBINATION, A DRIVING AND A DRIVEN MEMBER; HOUSING MEANS ON ONE OF SAID MEMBERS FORMING AN ENCLOSURE; A SPINDLE EXTENDING WITHIN SAID ENCLOSURE AND ROTATABLE RELATIVELY TO SAID HOUSING MEANS, SAID SPINDLE BEING OPERATIVELY CONNECTED TO THE OTHER OF SAID MEMBERS; BEARING MEANS WITHIN SAID ENCLOSURE INTERCONNECTING SAID HOUSING MEANS AND SAID SPINDLE COUPLING SAID DRIVING AND DRIVEN MEMBRS FOR JOINT ROTATION, SAID BEARING MEANS INCLUDING FIRST RACE MEANS ROTATABLE JOINTLY WITH SAID HOUSING MEANS, SECOND RACE MEANS ROTATABLE JOINTLY WITH SAID SPINDLE, AND ROLLER MEANS INTERMEDIATE SAID FIRST AND SECOND RACE MEANS AND IN FRICTIONAL CONTACT THEREWITH FOR MUTUAL ROTARY ENTRAINMENT OF SAID RACE MEANS UPON SAID DRIVEN MEMBER ENCOUNTERING AN IMPEDING RESISTANCE BELOW A PREDETERMINED LEVEL AND PERMITTING SUBSTANTIALLY FREE RELATIVE DISPLACEMENT OF SAID RACE MEANS UPON THE TORQUE APPLIED TO SAID DRIVEN MEMBER AND REQUIRED TO OVERCOME SAID IMPEDING RESISTANCE EXCEEDING A PREDETERMINED MAXIMUM, AND SUPPLEMENTARY ADJUSTABLE SLIP-CLUTCH MEANS INTERCONNECTING SAID DRIVING AND DRIVEN MEMBERS FOR SELECTIVELY INCREASING THE TORQUE APPLIED TO SAID DRIVEN MEMBER ABOVE THAT PROVIDED BY SAID BEARING MEANS.