Bearing torque test instrument

Claim 1

A BEARING TORQUE TEST INSTRUMENT FOR TESTING A BEARING HAVING INNER AND OUTER RACE MEMBERS AND ROLLING ELEMENTS DISPOSED THEREBETWEEN COMPRISING A HOUSING, A SHAFT ROTATABLY MOUNTED WITHIN SAID HOUS ING AND ADAPTED TO MATE WITH THE INNER RACE MEMBER OF SAID TEST BEARING , DRIVING MEANS MOUNTED ON SAID HOUSING AND ADAPTED TO APPLY TORQUE TO THE OUTER RACE MEMBER OF SAID TEST BEARING, WHEREBY A TRANSMITTED TORQUE IS APPLIED TO THE SAID INNER RACE MEMBER AND SHAFT FROM THE SAID OUTER RACE MEMBER THROUGH THE SAID ROLLING ELEMENTS THEREBETWEEN AN ELECTRICAL SERVOLOOP ROTATION-RESTRAINING SYSTEM COMPRISING A SIGNAL GENERATOR AND A TORQUE GENERATOR EACH HAVING A ROTOR AND A STATOR RESPECTIVELY, THE SAID ROTORS BEING MOUNTED ON SAID SHAFT IN COAXIAL SYMMETRY THEREWITH, EACH OF THE SAID STATORS BEING MOUNTED ON SAID HOUSING IN OPERATIVE RELATIONSHIP WITH THE ROTOR ASSOCIATED THEREWITH, SAID SIGNAL GENERATOR BEING ADAPTED TO PRODUCE AN OUTPUT SIGNAL IN PROPORTION TO ANGULAR DISPLACEMENT OF ITS SAID ROTOR, ELECTRICAL CONNECTING MEANS FOR APPLYING SAID OUTPUT SIGNAL FROM SAID SIGNAL GENERATOR TO THE SAID TORQUE GENERATOR, SAID TORQUE GENERATOR BEING ADAPTED TO