Alternating current synchronous reciprocating motor unit

Claim 1

ALTERNATING CURRENT SYNCHRONOUS RECIPROCATING MOTOR UNIT, WITH A TRANSVERSE MEDIAN PLANE OF SYMMETRY COMPRISNG TWO ANNULAR FERRITE MAGNETS HAVING AXIAL MAGMETIZATION, AN ENERGIZING COIL FED WITH ALTERNATING CURRENT, FOUR SETS OF ANNULAR SOFT-IRON PLATES CONSTITUING TWO PAIRS OF POLE PIECES, A PLURALITY OF COAXIAL CYLINDRICAL PLATES CONSTITUTING A MAGNETIC YOKE, A CYLINDRICAL TUBE OF NONMAGNETIC MATERIAL, AN ARMATURE OF SUBSTANTIALLY CYLINDRICAL SHAPE HAVING A CYLINDRICAL BULGE AT EACH OF ITS ENDS, TWO MEANS FOR ELASTICALLY DRAWING BACK SAID ARMATURE, A FIRST POLE PIECE OF SAID POLE PIECES, A FIRST ANNULAR MAGNET OF SAID ANNULAR MAGNETS, A SECOND POLE PIECE OF SAID POLE PIECES, AND ENERGIZING COIL, A THIRD POLE PIECE OF SAID POLE PIECES ,A SECOND ANNULAR MAGNET OF SAID ANNULAR MAGNETS, AND THE FOURTH POLE PIECES OF SAID POLE PIECES BEING ARRANGED IN THE ABOVE SEQUENCE WITH EACH ADJACENT TO THE FOLLOWING AND COAXIALLY ALIGNED ON SAID TUBE, THE TRANSVERSE MEDIAN PLANE OF SYMMETRY GOING TRANVERSLY THROUGH THE MIDDLE OF SAID COIL, SAID TWO ANNULAR MAGNETS BEING ARRANGED SO THAT THEIR POLARITY IS SYMMERICAL RELATIVE TO SAID PLANE, SAID YOKE COXAIALLY SURROUNDING SaID COIL WITH THE TWO POLE PIECES ADJACENT TO SAID COIL, SAID ARMATURE BEING MOUNTED INSIDE SAID TUBE FOR LENGRHWISE RECIPROCATION, THE OUTER DIAMETER OF SAID BULGES BEING CLOSE TO THE INNER DIAMETER OF SAID TUBE, EACH OF SAID BULGES BEING OPPOSITE ONE OF SAID MAGNETS WHEN SAID ARMATURE REVERSING WHEN THE MIDDLE OF THE LATTER IN SAID ARMATURE REVERSING WHEN THE MIDDLE OF THE LATTER MOVES FROM ONE SIDE OF SAID PLANE TO THE OTHER, AND EACH OF SAID TWO MEANS FOR ELASTICALLY DRAWING BACK SAID ARMATURE BEING MOUNTED AGAINST ONE END OF SAID ARMATURE TO PUSH THE LATTER ELASTICALLY TO ITS MIDDLE POSITION.