Magnetic core

Claim 1

A THREE-LEGGED LAMINATED MAGNETIC CORE HAVING SIMILARLY CONSTRUCTED ALTERNATELY REVERSED SUPERPOSED EDGEWISE COINCIDENT FLAT LAYERS EACH FORMED OF AT LEAST ONE LAMINATION SHEET CONTAINING SEVEN LAMINATION PIECES, SAID SEVEN LAMINATION PIECES IN EACH SHEET COMPRISING SEVEN DIFFERENT LAMINATION PATTERNS ALL OF WHICH ARE REPEATED IN SUCCESSIVE SHEETS OF ALL LAYERS SO THAT THE CORE IS COMPOSED OF SEVEN DIFFERENT LAMINATION PATTERNS, SAID LAMINATION PIECES OF EACH SHEET BEING EQUAL WIDTH RELATIVELY THIN DIFFERENT LENGTH STRIPS OF MAGNETIC MATERIAL HAVING A MOST FAVORABLE MAGNETIC DIRECTION COINCIDING WITH THEIR LENGTHWISE DIMENSION AND WITH THE NORMAL DIRECTION OF MAGNETIC FLUX THEREIN, THREE OF SAID PIECES IN EACH SHEET BEING SIDE BY SIDE PARALLEL LEG PIECES AND FOUR OF SAID PIECES BEING YOKE PIECES EXTENDING PERPENDICULAR TO SAID LEG PIECES AND BRIDGING THE SPACE BETWEEN CORRESPONDING ENDS OF ADJACENT LEG PAIRS WHEREBY SAID CORE HAS FOUR CORNER JOINTS BETWEEN AN END OF THE FOUR YOKE PIECES AND THE ENDS OF THE TWO OUTER LEG PIECES AND TWO T JOINTS BETWEEN THE OTHER ENDS OF THE FOUR YOKE PIECES AND THE ENDS OF THE CENTER LEG PIECE, EACH T JOINT BEING A MITRE JOINT ON ONE SIDE AND A SQUARE JOINT ON THE OTHER SIDE, THE SQUARE JOINTS IN EACH LAYER BEING ON OPPOSITE SIDES OF THE CENTER LEG, ALL FOURT OF SAID CORNER JOINTS BEING MITRE JOINTS IN EACH OF SAID LAYERS, THE FIRST OF SAID SEVEN PATTERNS BEING A GENERALLY PARALLELOGRAM SHAPED CENTER LEG PIECE WITH ITS ENDS AT FORTY-FIVE ANGULAR DEGREES TO ITS LONGITUDINAL CENTER LINE AND HAVING ONE CORNER NOTCHED AND ANOTHER CORNER SQUARED TO THE SAME WIDTH AS THE DEPTH OF THE NOTCH AND ON THE SAME SIDE, THE SECOND OF SAID SEVEN PATTERNS BEING A GENERALLY ISOSCELES TRAPEZOID SHAPED FIRST OUTER LEG PIECE WITH PARALLEL SIDES AND ENDS OF FORTY-FIVE DEGREES TO ITS SIDES AND HAVING ITS ENDS ADJACENT THE LONG SIDE SQUARE CUT TO THE SAME DEPTH, THE THIRD OF SAID SEVEN PATTERNS BEING A GENERALLY ISOSCELES TRAPEZOID SHAPED SECOND OUTER LEG PIECE WITH PARALLEL SIDES AND ENDS OF FORTY-FIVE DEGREES TO ITS SIDES AND HAVING ITS ENDS ADJACENT THE SHORT SIDE NOTCHED TO THE SAME DEPTH, THE FOURTH OF SAID SEVEN PATTERNS BEING A YOKE PIECE OF THE SAME GEOMETRICAL SHAPE AS THE THIRD PATTERN AND JOINING FORTY-FIVE DEGREE EXTENDING ADJACENT ENDS OF THE FIRST AND SECOND PATTERNS, THE FIFTH OF SAID SEVEN PARTH BEING A YOKE PIECE OF THE SAME GEOMETRICAL SHAPE AS THE SECOND PATTERN AND JOINING FORTH-FIVE DEGREE EXTENDING ADJACENT ENDS OF THE FIRST AND THIRD PATTERNS, THE SIXTH OF TSAID SEVERN PATTERNS BEING A YOKE PIECE HAVING A SQUARE END AND A NOTCHED CORNER FORTY-FIVE DEGREE END JOINING THE OTHER ENDS OF THE FIRST AND SECOND PATTERNS, THE SEVENTH OF SAID SEVEN PATTERNS BEING A YOKE PIECE HAVING A SQUARE END AND A SQUARE CORNER FORTYFIVE DEGREE END JOINING THE OTHER ENDS OF THE FIRST AND THIRD PATTERNS, THE LAYOUT OF PIECES IN THE SHEETS OF ALTERNATE LAYERS BEING REVERSED RELATIVE TO THE LONGITUDINAL CENTER LINE OF THE CENTER LEG.