Apparatus for furnishing electrical signals for torque measurement

Claim 1

APPARATUS FOR FURNISHING ELECTRICAL SIGNALS FOR TORQUE MEASUREMENT, COMPRISING A SHAFT, THE TORQUE ON WHICH IS TO BE MEASURED, FIRST AND SECOND WHEELS CO-AXIAL WITH THE SHAFT AND SECURED TO THE SHAFT AT FIRST AND SECOND LOCATIONS SPACED APART ALONG THE SHAFT SO AS TO TURN IN ACCORDANCE WITH THE TURNING OF THE SHAFT AT SAID FIRST AND SECOND LOCATIONS, RESPECTIVELY, A THIRD WHEEL CO-AXIAL WITH THE SHAFT AND MOUNTED TO TURN WITH RESPECT THERETO, A RING OF TEETH OF MAGNETIC MATERIAL ON THE SECOND WHEEL, A RING OF TEETH OF MAGNETIC MATERIAL ON THE THIRD WHEEL OF EQUAL PITCH TO THE TEETH ON THE SECOND WHEEL, COUPLING THE MEANS COUPLING THE THIRD WHEEL TO THE FIRST AND SECOND WHEELS SUCH THAT RELATIVE TURNING BETWEEN THE FIRST AND SECOND WHEELS BRINGS ABOUT A PROPORTIONALLY GREATER RELATIVE TURNING BETWEEN THE SECOND AND THIRD WHEELS, A STATOR ADJACENT THE RINGS OF TEETH, MEANS IN THE STATOR FOR CO-OPERATING WITH THE TEETH OF THE SECOND WHEEL FOR THE GENERATION OF ALTERNATING CURRENT WHEN THE SHAFT TURNS AND MEANS IN THE STATOR FOR COOPERATING WITH THE TEETH OF THE THIRD WHEEL FOR THE GENERATION OF ALTERNATING CURRENT, WHEN THE SHAFT TURNS, WHICH IS PHASE-DISPLACED FROM THE FIRST-MENTIONED ALTERNATING CURRENT BY AN AMOUNT DEPENDENT UPON THE TORQUE ON THE SHAFT.