Transducer apparatus

Claim 1

AN ULTRASONIC SCANNING SYSTEM FOR LOCATING THE POSITION OF AN ECHOING BODY RELATIVE TO AT LEAST TWO INTERSECTING AXES, SAID SYSTEM COMPRISING: A FIRST TRANSDUCER RESPONSIVE TO AN ELECTRICAL SIGNAL FOR TRANSMITTING AN ULTRASONIC SIGNAL TOWARD THE BODY TO PRODUCE AN ULTRASONIC ECHO SIGNAL THEREFROM; A SOURCE OF ELECTRICAL SIGNAL CONNECTED TO SAID FIRST TRANSDUCER FOR SUPPLYING THE ELECTRICAL SIGNAL THERETO; AN ARRAY OF AT LEAST FOUR OTHER TRANSDUCERS EQUIDISTANTLY SPACED FROM SAID FIRST TRANSDUCER ALONG THE INTERSECTING AXES FOR DETECTING THE ULTRASONIC ECHO SIGNAL FROM THE BODY, EACH OF SAID OTHER TRANSDUCERS PRODUCING A CORRESPONDING ELECTRICAL ECHO SIGNAL AS IT DETECTS THE ULTRASONIC ECHO SIGNAL FROM THE BODY; MEANS FOR SUPPORTING ALL OF SAID TRANSDUCERS IN FIXED RELATIONSHIP TO ONE ANOTHER; A COINCIDENCE GATING CIRCUIT; CIRCUIT MEANS CONNECTING EACH OF SAID OTHER TRANSDUCERS TO SAID COINCIDENCE GATING CIRCUIT FOR APPLYING THE ELECTRICAL ECHO SIGNALS FROM SAID OTHER TRANSDUCERS TO SAID COINCIDENCE GATING CIRCUIT;