Apparatus for signal reflection ultrasonic flaw testing

Claim 1

AN ULTRASONIC SIGNAL REFLECTION TYPE FLAW TEST UNIT COMPRISING A CRANK HAVING A SHAFT DEFINING AN AXIS OF ROTATION THEREFOR, A RIGID SLEEVE ADAPTED TO BE SUITABLY SUPPORTED, SAID RIGID SLEEVE BEING DISPOSED IN SURROUNDING RELATIONSHIP TO SAID SHAFT AND MOUNTED FOR ROTATION RELATIVE TO SAID SHAFT WHEREBY SAID SHAFT IS ADAPTED TO BE ROTATABLY SUPPORTED BY SAID SLEEVE WHEN THE SLEEVE IS SUITABLY SUPPORTED, MEANS FOR LIMITING AXIAL MOVEMENT OF SAID SLEEVE WITH RESPECT TO SAID SHAFT, A CONTACT ELEMENT MOUNTED ON ONE END OF SAID SHAFT AND ENGAGEABLE WITH A TEST PIECE TO ROTATE ABOUT SAID AXIS UPON ROTATION OF SAID CRANK, AN ELECTROMECHANICAL TRANSDUCER COMPONENT MOUNTED ON SAID CONTACT ELEMENT AT A LOCATION SPACED FROM SAID AXIS TO SWING ABOUT SAID AXIS UPON ROTATION OF THE CRANK AND ESTABLISH SLIDING ULTRASONIC COUPLING WITH A TEST PIECE, AN ULTRASONIC TRANSCEIVER SUPPORTED BY SAID SHAFT AND HAVING MEANS FOR PERIODICALLY GENERATING ELECTRICAL TEST SIGNALS OF ULTRASONIC FREQUENCY, MEANS FOR RECEIVING ELECTRICAL SIGNALS OF ULTRASONIC FREQUENCY, AND MEANS CONNECTING SAID GENERATING MEANS TO SAID TRANSDUCER COMPONENT TO TRANSMIT CORRESPONDING MECHANICAL TEST SIGNALS INTO A TEST PIECE AND CONNECTING THE TRANSDUCER COMPONENT TO SAID RECEIVING MEANS TO TRANSMIT ELECTRICAL SIGNALS CORRESPONDING TO MECHANICAL REFLECTION SIGNALS RETURNING FROM DISCONTINUITIES IN A TEST PIECE, AND INDICATING MEANS SUPPORTED BY SAID SHAFT AND BEING RESPONSIVE TO THE OUTPUT OF SAID RECEIVING MEANS.