Machine and method for forming laminations for magnetic cores

Claim 1

IN A MACHINE FOR MAKING LAMINATIONS FOR MAGNETIC CORES WITH LAMINATION LAYERS FORMED OF PAIRS OF LAMINATION SECTIONS, EACH OF THE LAMINATION SECTIONS HAVING A PAIR OF LEG PORTIONS AND A CROSS MEMBER JOINING SAID LEG PORTIONS, A STRIP MATERIAL SUPPLY MEANS, A STRIP THICKNESS GAUGING MEANS FOR MEASURING THE ACTUAL STRIP THICKNESS, A STRIP LENGTH INDEXING MEANS FOR INDEXING A FIRST, SECOND AND THIRD LENGTH OF STRIP MATERIAL, SAID FIRST LENGTH FORMING ONE LEG PORTION, SAID SECOND LENGTH FORMING SAID CROSS MEMBER, AND SAID THIRD LENGTH FORMING THE OTHER LEG PORTION OF A LAMINATION SECTION, MEANS COUPLED WITH SAID INDEXING MEANS FOR ADJUSTABLY VARYING THE INDEXED LENGTHS BY AN INCREMENT PROPORTIONAL TO THE ACTUAL STRIP THICKNESS AS DETERMINED BY SAID GAUGING MEANS TO PROVIDE A FIRST AND A THIRD INDEXED LENGTH FOR LAMINATION SECTIONS OF A SUCCEEDING LAMINATION LAYER THAT DIFFERS FROM THE FIRST AND THIRD LENGTHS OF THE LAMINATION SECTION OF A PRECEDING LAMINATION LAYER ESSENTIALLY ONE INCREMENT PROPORTIONAL TO THE STRIP THICKNESS, AND TO PROVIDE A SECOND INDEXED LENGTH FOR LAMINATION SECTIONS OF THE SUCCEEDING LAMINATION LAYER THAT DIFFERS FROM THE SECOND LENGTH OF THE LAMINATION SECTION OF A PRECEDING LAMINATION LAYER BY ESSENTIALLY TWO INCREMENTS THEREBY TO PROGRESSIVELY PROVIDE THE INDEXED LENGTHS FOR EACH SUCCESSIVE LAYER BY ALTERATION OF SAID LENGTHS BY SAID RESPECTIVE INCREMENTS BETWEEN THE FORMATION OF EACH SUCCESSIVE LAMINATION LAYER, FORMING MEANS FOR BENDING SAID STRIP MATERIAL AT SAID FIRST AND SECOND INDEXED LENGTHS, AND MEANS FOR SHEARING AID STRIP MATERIAL AT THE THIRD INDEXED LENGTH TO CUT OFF SAID LAMINATION SECTIONS.