Bobbin with grooves in edge of flange

Claim 1

A BOBBIN INTEGRALLY MOLDED FROM AN ELECTRICALLY INSULATING MATERIAL COMPRISING A TUBE AND A FIRST FLANGE AND A SECOND FLANGE JOINED TO THE TUBE AT THE ENDS THEREOF, SAID FLANGES BEING DISPOSED SUBSTANTIALLY AT RIGHT ANGLES TO THE AXIS OF SAID TUBE, A LENGTH OF WIRE COILED ABOUT SAID TUBE BETWEEN SAID FLANGES AND HAVING A PAIR OF LEADS EXTENDING THEREFROM, A PAIR OF CONDUCTIVE TERMINAL LUGS EMBEDDED IN SAID FIRST FLANGE, SAID FIRST FLANGE HAVING A PERIPHERAL EDGE, AN UNDERCUT POCKET FORMED IN SAID FIRST FLANGE AT A PLACE REMOTE FROM SAID TERMINAL LUGS, AND EXTENDING FROM ADJACENT SAID TUBE TO SAID PERIPHERAL EDGE, SAID UNDERCUT POCKET BEING DEFINED IN PART BY A LIP PORTION WHICH PARTIALLY ENCLOSES THE UNDERCUT POCKET, A FIRST GROOVE IN THE PERIPHERAL EDGE OF SAID FIRST FLANGE EXTENDING FROM SAID UNDERCUT POCKET TO A POSITION ADJACENT ONE CONDUCTIVE TERMINAL LUG, A SECOND GROOVE IN THE PERIPHERAL EDGE OF SAID FIRST FLANGE EXTENDING FROM SAID UNDERCUT POCKET TO A POSITION ADJACENT THE OTHER CONDUCTIVE TERMINAL, ONE LEAD OF THE WIRE EXTENDING THROUGH THE UNDERCUT POCKET INTO SAID FIRST GROOVE AND BEING SECURED AT ITS END TO SAID ONE CONDUCTIVE TERMINAL LUG, THE OTHER LEAD OF THE WIRE EXTENDING OVER SAID LIP PORTION AND THROUGH SAID UNDERCUT POCKET INTO SAID SECOND GROOVE IN SPACED AND INSULATED RELATIONSHIP WITH RESPECT TO SAID ONE LEAD, THE END OF SAID LEAD BEING AFFIXED TO SAID OTHER CONDUCTIVE TERMINAL LUG, WHEREBY THE LEADS CROSS OVER ONE ANOTHER IN INSULATED AND SPACED RELATIONSHIP.