Magnetic data processing apparatus

Claim 1

MAGNETIC DATA PROCESSING APPARATUS, COMPRISING A DATA ENTERING UNIT, A DATA STORING UNIT AND A DATA REPRODUCING UNIT; SAID DATA STORING UNIT HAVING A CARRIER STRUCTURE AND HAVING AN ORDERED GROUP OF PERMANENT MAGNETS ROTATABLY MOUNTED INDIVIDUALLY ON SAID CARRIER STRUCTURE; SAID DATA ENTERING UNIT HAVING A NUMBER OF MAGNETIC FIELD MEANS OF SELECTIVELY VARIABLE INDIVIDUAL MAGNETIC ORIENTATION AND CAPABLE OF ROTATING SAID PERMANENT MAGNETS WITHOUT MECHANICAL CONTACT WHEN SAID ENTERING UNIT AND SAID STORING UNIT ARE IN PROXIMITY TO EACH OTHER WHEREBY SAID PERMANENT MAGNETS ASSUME RESPECTIVE ORIENTATIONS JOINTLY CORRESPONDING TO THE INFORMATIVE CONTENT EXHIBITED BY SAID DATA ENTERING UNIT; SAID STORING UNIT AND SAID REPRODUCING UNIT BEING MOVABLE RELATIVE TO EACH OTHER ON A PATH INCLUDING A POSITION OF MUTUAL PROXIMITY; AND SAID REPRODUCING UNIT HAVING AN ORDERED GROUP OF TRANSDUCER HEADS OF WHICH EACH IS RESPONSIVE TO THE FIELD AND MAGNETIC ORIENTATION OF ONE OF SAID RESPECTIVE MAGNETS WHEN SAID REPRODUCING UNIT AND SAID STORING UNIT ARE IN PROXIMITY TO EACH OTHER, EACH OF SAID TRANSDUCER HEADS HAVING MAGNETIZABLE CORE MEANS WITH A FIELD GAP AND HAVING A HALL PLATE LOCATED IN SAID GAP, AND CURRENT SUPPLY MEANS CONNECTED TO SAID HALL PLATES WHEREBY EACH PLATE FURNISHES AN OUTPUT VOLTAGE WHOSE CHARACTERISTIC IS INDICATIVE OF THE MAGNETIC ORIENTATION OF THE PARTICULAR PERMANENT MAGNET OF THE STORER UNIT RESPONDED TO BY SAID HALL PLATE.