Method of producing high energy permanent magnets

Claim 1

A METHOD OF PRODUCING PERMANENT MAGNETS HAVING RELATIVELY HIGH ENERGY CONTENTS COMPRISING THE STEPS OF PROVIDING A PLURALITY OF MULTI-DOMAIN ROD-LIKE FERROMAGNETIC ELEMENTS COMPOSED OF A DUCTILE MATERIAL SELECTED FROM THE GROUP CONSISTING OF DUCTILE FERROMAGNETIC METALS AND DUCTILE FERROMAGNETIC ALLOYS OF METALS, ENCLOSING EACH ELEMENT IN AT LEAST A FIRST CASING COMPOSED OF A WELDABLE MATERIAL SELECTED FROM THE GROUP CONSISTING OF METALS AND ALLOYS OF METALS AND DIFFERENT TO THE MATERIAL SELECTED FOR THE FERROMAGNETIC ELEMENTS BUT HAVING SUBSTANTIALLY THE SAME DUCTILITY, CLEANING THE EXTERNAL SURFACES OF THE ENCASED FERROMAGNETIC ELEMENTS, ENCLOSING A PLURALITY OF THE ENCASED FERROMAGNETIC ELEMENTS IN A SECOND CASING COMPOSED OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF METALS AND ALLOYS OF METALS AND DIFFERENT TO THE MATERIAL SELECTED FOR THE FERROMAGNETIC ELEMENTS BUT HAVING SUBSTANTIALLY THE SAME DUCTILITY TO FORM A PRIMARY COMPOSITE BODY AND HAVING A FIRST RATIO OF FERROMAGNETIC MATERIAL TO WELDABLE CASING MATERIAL HIGHER THAN THE DESIRED RATIO OF THE FINISHED PRODUCT, DRAWING THE PRIMARY COMPOSITE BODY BY A SERIES OF DRAWING OPERATIONS WITH ANNEALING OF THE PRIMARY COMPOSITE BODY BETWEEN EACH DRAWING OPERATION SO THAT THE FIRST CASINGS ENCLOSING THE FERROMAGNETIC ELEMENTS ARE WELDED TO EACH OTHER, REMOVING AT LEAST A PORTION OF THE SECOND CASING FROM THE COMPOSITE BODY TO YIELD A DESIRED RATIO OF THE SECOND WELDABLE CASING MATERIAL TO THE RATIO OF THE FERROMAGNETIC MATERIAL ELEMENTS, REPEATING THE FOREGOING STEPS TO FORM A PLURALITY OF SAID PRIMARY COMPOSITE BODIES, ENCLOSING THE PLURALITY OF SAID PRIMARY COMPOSITE BODIES IN A THIRD CASING COMPOSED OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF METALS AND ALLOYS OF METALS AND DIFFERENT TO THE MATERIAL SELECTED FOR THE FERROMAGNETIC ELEMENTS BUT HAVING SUBSTANTIALLY THE SAME DUCTILITY TO FORM A SECONDARY COMPOSITE BODY, DRAWING THE SECONDARY COMPOSITE BODY BY A SERIES OF DRAWING OPERATIONS WITH ANNEALING OF THE SECONDARY COMPOSITE BODY BETWEEN EACH DRAWING OPERATION SO THAT THE PRIMARY COMPOSITE BODIES ARE WELDED TO EACH OTHER, AND REPEATING THE FOREGOING STEPS AS NECESSARY WITH ADDITIONAL COMPOSITE BODIES UNTIL SUBSTANTIALLY ALL OF THE FERROMAGNETIC ELEMENTS ARE SINGLE DOMAIN THEREBY TO PROVIDE A PERMANENT MAGNET HAVING HIGH ENERGY CONTENT AND FERROMAGNETIC MATERIAL IN THE DESIRED RATIO TO THE WELDABLE SECOND CASING MATERIAL.

Claim 2

A METHOD OF PRODUCING PERMANENT MAGNETS HAVING RELATIVELY HIGH ENERGY CONTENTS COMPRISING THE STEPS OF PROVIDING A PLURALITY OF MULTI-DOMAIN ROD-LIKE FERROMAGNETIC ELEMENTS COMPOSED OF A DUCTILE MATERIAL SELECTED FROM THE GROUP CONSISTING OF DUCTILE FERROMAGNETIC METALS AND DUCTILE FERROMAGNETIC ALLOYS OF METALS, ENCLOSING EACH ELEMENT IN AT LEAST A FIRST CASING COMPOSED OF A WELDABLE MATERIAL SELECTED FROM THE GROUP CONSISTING OF METALS AND ALLOYS OF METALS AND DIFFERENT TO THE MATERIAL SELECTED FOR THE FERROMAGNETIC ELEMENTS BUT HAVING SUBSTANTIALLY THE SAME DUCTILITY, CLEANING THE EXTERNAL SURFACES OF THE ENCASED FERROMAGNETIC ELEMENTS, ENCLOSING A PLURALITY OF THE ENCASED FERROMAGNETIC ELEMENTS IN A SECOND CASING COMPOSED OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF METALS AND ALLOYS OF METALS AND DIFFERENT TO THE MATERIAL SELECTED FOR THE FERROMAGNETIC ELEMENTS BUT HAVING SUBSTANTIALLY THE SAME DUCTILITY TO FORM A PRIMARY COMPOSITE BODY AND HAVING A FIRST RATIO OF FERROMAGNETIC MATERIAL TO WELDABLE CASING MATERIAL HIGHER THAN THE DESIRED RATIO OF THE FINISHED PRODUCT, DRAWING THE PRIMARY COMPOSITE BODY BY A SERIES OF DRAWING OPERATIONS WITH ANNEALING OF THE PRIMARY COMPOSITE BODY BETWEEN EACH DRAWING OPERATION SO THAT THE FIRST CASINGS ENCLOSING THE FERROMAGNETIC ELEMENTS ARE WELDED TO EACH OTHER, REMOVING AT LEAST A PORTION OF THE SECOND CASING FROM THE COMPOSITE BODY TO YIELD A DESIRED RATIO OF THE SECOND WELDABLE CASING MATERIAL TO THE RATIO OF THE FERROMAGNETIC MATERIAL ELEMENTS, REPEATING THE FOREGOING STEPS TO FORM A PLURALITY OF SAID PRIMARY COMPOSITE BODIES, ENCLOSING THE PLURALITY OF SAID PRIMARY COMPOSITE BODIES IN A THIRD CASING COMPOSED OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF METALS AND ALLOYS OF METALS AND DIFFERENT TO THE MATERIAL SELECTED FOR THE FERROMAGNETIC ELEMENTS BUT HAVING SUBSTANTIALLY THE SAME DUCTILITY TO FORM A SECONDARY COMPOSITE BODY, DRAWING THE SECONDARY COMPOSITE BODY BY A SERIES OF DRAWING OPERATIONS WITH ANNEALING OF THE SECONDARY COMPOSITE BODY BETWEEN EACH DRAWING OPERATION SO THAT THE PRIMARY COMPOSITE BODIES ARE WELDED TO EACH OTHER, AND REPEATING THE FOREGOING STEPS AS NECESSARY WITH ADDITIONAL COMPOSITE BODIES UNTIL SUBSTANTIALLY ALL OF THE FERROMAGNETIC ELEMENTS ARE SINGLE DOMAIN THEREBY TO PROVIDE A PERMANENT MAGNET HAVING HIGH ENERGY CONTENT AND FERROMAGNETIC MATERIAL IN THE DESIRED RATIO TO THE WELDABLE SECOND CASING MATERIAL.