Method of bonding laminated electromagnetic cores

Claim 1

IN A METHOD OF MANUFACTURING CORES FOR MOUNTING ELECTROMAGNETIC OILS THEREON TO FORM ELECTROMAGNETIC DEVICES WHEREIN SAID CORES INCLUDE OUTER WINDING LEGS AND A CENTER WINDING LEG, EACH FORMED OF A STACK OF A PREDETERMINED NUMBER OF INDIVIDUAL LAMINATION PARTS OF SIZE AND CONFIGURATION TO FORM SAID LEGS AND IN WHICH THE METHOD INCLUDES THE STEPS OF ASSEMBLING THE INDIVIDUAL PARTS INTO STACKS TO FORM THE OUTER WINDING LEGS AND A CENTRAL WINDING LEG AND ASSEMBLING SAID SO-FORMED WINDING LEGS WITH THE ELECTROMAGNETIC COILS MOUNTED THEREON TO FORM SAID CORE CONSTRUCTION BY PLACING END PORTIONS OF SAID OUTER WINDING LEGS ABUTTING ADJACENT END PORTIONS OF SAID CENTRAL WINDING LEG; THE INVENTION COMPRISING THE STEPS OF APPLYING AN EXTERIOR COATING OF A POLYMERIZABLE RESINOUS COMPOSITION AT A FIRST VISCOSITY STAGE OF LOW FLOWABILITY TO THE ABUTTING PORTIONS OF SAID WINDING LEGS PRIOR TO THEIR ASSEMBLY TO FORM SAID CORE CONSTRUCTION, PLACING DISPOSABLE BINDER MEANS OVER THE ENDS OF SAID ASSEMBLED WINDING LEGS AND SPACED FROM SAID ENDS, AND THEREAFTER, WITH THE DISPOSABLE BINDER MEANS SO PLACED, CURING SAID RESINOUS COMPOSITION TO AN INTERMEDIATE VISCOSITY STAGE OF HIGH FLOWABILITY TO INTRODUCE, AS BY CAPILLARY ACTION, BETWEEN JUXTAPOSED INDIVIDUAL LAMINATION PARTS AND THEREAFTER COMPLETING THE CURE OF SAID RESINOUS COMPOSITION TO A CURED VISCOSITY STAGE OF ZERO FLOWABILITY WHEREBY SAID LAMINATIONS ARE PERMANENTLY BONDED.