Coil for electromagnetic apparatus

Claim 1

A COIL ASSEMBLY FOR ELECTROMAGNETIC APPARATUS COMPRISING AN INSULATING BOBBIN HAVING A CENTRAL COLUMN AND A PAIR OF RADIALLY-EXTENDING AXIALLY SPACED FLANGES, SAID FLANGES HAVING OUTER EDGES BEVELED SO AS TO FORM BEVELED SURFACES EXTENDING FROM THE INNER CONFRONTING SURFACES OF THE FLANGES INWARDLY TOWARD THE COLUMN TO THE OUTER SURFACES OF THE FLANGES, A COIL OF INSULATED WIRE SURROUNDING THE COLUMN IN THE SPACE BETWEEN THE FLANGES, SAID COIL HAVING A RADIAL DIMENSION SUBSTANTIALLY LESS THAN THE RADIAL DIMENSION OF THE INNER SURFACES OF THE FLANGES, ONE OF SAID FLANGES HAVING SPACED SLOTS EXTENDING RADIALLY FROM THE EDGE THEREOF TOWARD THE COIL, A PAIR OF L-SHAPED TERMINALS EACH HAVING ONE LEG PROJECTING AXIALLY INTO A SEPARATE SLOT OF THE ONE FLANGE AND HAVING THE OTHER LEG OVERLYING THE OTHER FLANGE AND EXPOSED TO RECEIVE A CONTACT THE ENDS OF SAID COIL BEING CONNECTED TO THE ONE LEG OF SAID TERMINALS, AND A BAND OF SOLID THERMOSETTING INSULATING MATERIAL WHICH SHRINKS ON SETTING FILLING THE SPACE BETWEEN THE INNER SURFACES OF THE FLANGES AND IN INTIMATE CONTACT WITH THE PERIPHERY OF THE COIL AND SAID INNER SURFACES, SAID BAND EXTENDING RADIALLY BEYOND THE EDGES OF THE FLANGES AND EXTENDING AT LEAST TO THE OUTER SURFACES OF THE FLANGES TO OVERLAP THE BEVELED SURFACES IN INTIMATE CONTACT THEREWITH, SAID BAND COMPLETELY IMPEDING THE ONE LEGS OF SAID TERMINALS.