Bending-strain transducer

Claim 1

A BENDING STRAIN TRANSDUCER FOR THE INVESTIGATION OF STRAIN GRADIENTS IMPOSED UPON A WORKPIESE, SAID TRANSDUCER COMPRISING FIRST AND SECOND SIMILAR BONDED RESISTANCE STRAIN GAUGES HAVING EQUAL GAUGE LENGTHS, AN ELONGATED BASE SEPARATOR STRIP OF A PLASTIC MATERIAL HAVING A MODULUS OF ELASTICITY LESS THAN THE MODULUS OF ELASTICITY OF THE WORKPIECES, SAID PLASTIC MATERIAL HAVING A DISPERSION OF METAL PARTICLES THEREIN, SAID BASE STRIP HAVING A UNIFORM THICKNESS AND A PREDETERMINED BASE LENGTH EXCEEDING SAID GUAGE LENGTHS BY AT LEAST TEN TIMES SAID THICKNESS, SAID GUAGES BEING BONDED SYMMETRICALLY UPON OPPOSITE SURFACES OF SAID BASE STRIP WITH THEIR RESPECTIVE GUAGE LENGTHS PARALLELING SAID BASE LENGTH AND SUBTENDING THE SAME PORTION OF SAID BASE STRIP, AND MEANS SUBSTANTIALLY COEXTENSIVE WITH A GUAGED SURFACE OF SAID TRANSDUCER BONDING SAID TRANSDUCER TO SAID WORKPIECE THROUGHOUT THE AREA OF ONE SURFAE OF THE WORKPIECE SUBTENDED BY SAID BASE STRIP.