Method of making a laminated core

Claim 1

THE METHOD OF MAKING A WOUND RECTANGULAR TRANSFORMER CORE HAVING A RECTANGULAR WINDOW FORMED FROM A PLURALITY OF INTERNESTED SINGLE TURN LAMINATIONS IN WHICH THE OPPOSITE ENDS OF EACH LAMINATION ARE IN ABUTMENT COMPRISING THE STEPS OF CUTTING A PLURALITY OF SUCCESSIVELY SHORTER STRIPS OF CORE MATERIAL OF SUBSTANTIALLY CONSTANT THICKNESS EACH DIFFERING IN LENGTH FROM THE NEXT LONGER STRIP BY AN AMOUNT EQUAL TO AT LEAST 2$T WHERE T IS THE STRIP MATERIAL THICKNESS, STACKING THE STRIPS IN SIZE ORDER END-SHIFTING THE STRIPS IN THE SAME DIRECTION RELATIVE TO ONE ANOTHER TO DISPLACE THE STRIP ENDS AT ONE END OF THE STACK BY PREDETERMINED AMOUNTS, AT LEAST ONE OF THE SAID STRIPS BEING END-SHIFTED BY AN AMOUNT SUBSTANTIALLY GREATER THAN THE AMOUNT OF END-SHIFT OF THE REMAINING STRIPS, MAINTAINING THE STRIPS IN THEIR END-SHIFTED CONDITION WHILE BENDING THE STACK INTO CIRCULAR ANNULAR FORM WITH THE SHORTEST STRIP DISPOSED ON THE INSIDE OF THE ANNULUS TO BRING THE OPPOSITE ENDS OF EACH STRIP INTO ABUTMENT AND FORM A FIRST CORE SECTION HAVING A JOINT DEFINED BY THE SUCCESSIVELY DISPLACED ABUTMENTS OF THE STRIPS, MAKING ADDITIONAL ANNULAR CORE SECTIONS IN THE SAME MANNER AS THAT BY WHICH THE SAID FIRST CORE SECTION WAS MADE BUT OF SUCCESSIVELY LARGER SIZE TO THAT ALL CORE SECTIONS MAY BE CLOSELY INTERNESTED, INTERNSTING ALL OF SAID CORE SECTIONS WITH THE SECTION JOINTS OF SAID ADDITIONAL SECTIONS OVERLYING ONE AN-

Claim 2

THE METHOD OF MAKING A WOUND RECTANGULAR TRANSFORMER CORE HAVING A RECTANGULAR WINDOW FORMED FROM A PLURALITY OF INTERNESTED SINGLE TURN LAMINATIONS IN WHICH THE OPPOSITE ENDS OF EACH LAMINATION ARE IN ABUTMENT COMPRISING THE STEPS OF CUTTING A PLURALITY OF SUCCESSIVELY SHORTER STRIPS OF CORE MATERIAL OF SUBSTANTIALLY CONSTANT THICKNESS EACH DIFFERING IN LENGTH FROM THE NEXT LONGER STRIP BY AN AMOUNT EQUAL TO AT LEAST 2$T WHERE T IS THE STRIP MATERIAL THICKNESS, STACKING THE STRIPS IN SIZE ORDER END-SHIFTING THE STRIPS IN THE SAME DIRECTION RELATIVE TO ONE ANOTHER TO DISPLACE THE STRIP ENDS AT ONE END OF THE STACK BY PREDETERMINED AMOUNTS, AT LEAST ONE OF THE SAID STRIPS BEING END-SHIFTED BY AN AMOUNT SUBSTANTIALLY GREATER THAN THE AMOUNT OF END-SHIFT OF THE REMAINING STRIPS, MAINTAINING THE STRIPS IN THEIR END-SHIFTED CONDITION WHILE BENDING THE STACK INTO CIRCULAR ANNULAR FORM WITH THE SHORTEST STRIP DISPOSED ON THE INSIDE OF THE ANNULUS TO BRING THE OPPOSITE ENDS OF EACH STRIP INTO ABUTMENT AND FORM A FIRST CORE SECTION HAVING A JOINT DEFINED BY THE SUCCESSIVELY DISPLACED ABUTMENTS OF THE STRIPS, MAKING ADDITIONAL ANNULAR CORE SECTIONS IN THE SAME MANNER AS THAT BY WHICH THE SAID FIRST CORE SECTION WAS MADE BUT OF SUCCESSIVELY LARGER SIZE TO THAT ALL CORE SECTIONS MAY BE CLOSELY INTERNESTED, INTERNSTING ALL OF SAID CORE SECTIONS WITH THE SECTION JOINTS OF SAID ADDITIONAL SECTIONS OVERLYING ONE AN-