Data tracking system

Claim 1

A TRANSDUCER POSITIONING SYSTEM COMPRISING: A MAGNETIC STORAGE MEMBER HAVING A DATA STORAGE PATH; SERVO CONTROLLED POSITIONING MEANS; A SERVO TRANSDUCER AND A READ-WRITE TRANSDUCER MOUNTED A PREDETERMINED DISTANCE APART ON SAID POSITIONING MEANS FOR SYNCHRONOUS MOVEMENT ADJACENT THE SURFACE OF SAID STORAGE MEMBER; AN ARRAY OF FREQUENCY SIGNIFICANT PAIRS OF CONVERGING EDGE FORMATIONS ON SAID STORAGE MEMBER AND ASSOCIATED WITH SAID SERVO TRANSDUCER, SAID FORMATIONS BEING POSITIONED ALONG AND EXTENDING ON EITHER SIDE OF A REFERENCE LINE SITUATED IN PARALLEL WITH AND AT A DISTANCE FROM SAID STORAGE PATH WHICH CORRESPONDS TO SAID PREDETERMINED DISTANCE; MEANS FOR IMPARTING RELATIVE MOVEMENT BETWEEN SAID STORAGE MEMBER AND SAID POSITIONING MEANS SO THAT STANDARD FREQUENCY SIGNAL PAIRS ARE CREATED IN SAID SERVO TRANSDUCER BY PASSAGE OF SAID PAIRS OF EDGE FORMATIONS WHEN SAID TRANSDUCER IS TRACKING ALONG SAID REFERENCE LINE, AND SO THAT NON-STANDARD FREQUENCY SIGNAL PAIRS ARE CREATED IN SAID SERVO TRANSDUCER BY PASSAGE OF SAID PAIRS OF EDGE FORMATIONS WHEN SAID TRANSDUCER IS TRACKING ON EITHER SIDE OF SAID REFERENCE LINE; AND CIRCUIT MEANS RESPONSIVE TO SAID NON-STANDARD SIGNAL PAIRS OF FOR ACTUATING SAID POSITIONING MEANS SO THAT SAID TRANSDUCERS ARE MOVED IN AN APPROPRIATE DIRECTION FOR RE-ESTABLISHING SAID STANDARD FREQUENCY, WHEREBY SAID READ-WRITE TRANSDUCER IS MAINTAINED IN ACCURATE TRACKING RELATION WITH RESPECT TO SAID DATA STORAGE PATH.