Torque measuring device

Claim 1

A TORQUE MEASURING DEVICE COMPRISING AN ELONGATED TORSION ROD, FIRST AND SECOND RIGID MEMBERS ATTACHED TO DIFFERENT ENDS OF SAID TORSION ROD, A LINEAR VOLTAGE DIFFERENTIAL TRANSFORMER HAVING AN ANNULARLY WOUND PRIMARY WINDING WITH A PAIR OF SERIES OPPOSING ANNULARLY WOUND SECONDARY WINDINGS IN AXIAL ALIGNMENT THEREWITH AND ON EITHER SIDE OF SAID PRIMARY WINDING AND A MAGNETIC CORE MOVABLE ALONG THE AXES OF SAID WINDINGS WITHIN THE ANNULAR OPENINGS PROVIDED THEREBY, SAID PRIMARY AND SECONDARY WINDINGS BEING CONNECTED TO SAID FIRST RIGID MEMBER AND SAID CORE BEING CONNECTED TO SAID SECOND RIGID MEMBER FOR RELATIVE MOVEMENT BETWEEN SAID CORE AND SAID WINDINGS DUE TO THE TORSIONAL DISPLACEMENT OF THE ENDS OF SAID ROD AND WHEREIN SAID FIRST RIGID MEMBER HOLDS SAID WINDINGS WITH THEIR AXES TANGENTIAL TO A RADIUS OF THE TORSIONAL DISPLACEMENT, AND SAID SECOND RIGID MEMBER HOLDS SAID CORE FOR RELATIVE MOVEMENT ALONG THE AXIS OF SAID WINDINGS, A SOURCE OF ALTERNATING CURRENT CONNECTED TO SAID PRIMARY WINDING TO PRODUCE AN ALTERNATING MAGNETIC FIELD COUPLING THROUGH SAID CORE TO EACH OF SAID SECONDARY WINDINGS, WHEREBY THE VOLTAGE ACROSS SAID SECONDARY WINDINGS IS PROPORTIONAL TO THE TORSIONAL FORCE ON SAID ROD.