cosner

Claim 1

FOR USE IN A MATERIALS TENSILE TESTING MACHINE HAVING A FIXED FRAME, A MOVABLE PORTION ADAPTED TO MOVE RECIPROCALLY IN RELATIONSHIP TO THE FIXED FRAME, CONTROL AND ACTUATING MEANS WHEREBY PRECISE MOVEMENTS OF SAID MOVABLE PORTION MAY BE CONTINUALLY AND REPEATEDLY MADE, MEANS FOR SENSING LOAD DATA DURING OPERATION, MEANS FOR INDICATING SENSED LOAD DATA, AND A PAIR OF SPECIMEN HOLDING JAWS; A SUBASSEMBLY FOR PERFORMING HARDNESS TESTS, WHICH SUBASSEMBLY COMPRISES, IN COMBINATION, A FIRST YOKE ASSEMBLY HAVING A BOTTOM JAW PIN ADAPTED TO FIT ONE OF THE SPECIMEN HOLDING JAWS, A BOTTOM YOKE ARM TRANSVERSELY AFFIXED TO AN END OF SAID BOTTOM JAW PIN, A PROBE RETAINER BASE DISPOSED PARALLEL TO THE BOTTOM YOKE ARM AND ATTACHED THERETO BY AT LEAST TWO SPACER RODS, AND POINTED PROBE INDENTER MEANS ATTACHED CENTRALLY TO THE PROBE RETAINER BASE; AND A SECOND YOKE ASSEMBLY HAVING A TOP JAW PIN ADAPTED TO FIT THE OTHER OF SAID PAIR OF SPECIMEN HOLDING JAWS, A TOP YOKE ARM TRANSVERSELY AFFIXED TO AN END OF SAID TOP JAW PIN, AND A SPECIMEN HOLDING TABLE DISPOSED PARALLEL TO THE TOP YOKE ARM AND ATTACHED THERETO BY AT LEAST ANOTHER TWO SPACER RODS; SAID FIRST AND SAID SECOND YOKE ASSEMBLIES BEING ARRANGED IN OPPOSED INTERLOCKED SLIDEABLY COOPERABLE RELATIONSHIP WITH THE POINTED PROBE INDENTER MEANS OF THE FIRST YOKE ASSEMBLY SUBTENDING THE SPECIMEN HOLDING TABLE OF THE SECOND YOKE ASSEMBLY.