Magnetic head construction

Claim 1

A SCANNING HEAD FOR A MAGNETIC TRACK, COMPRISING A CASING HAVING TWO OPPOSING SHELLS FORMED OF MATERIAL HAVING HIGH MAGNETIC PERMEABILITY, EACH OF THE SHELLS HAVING A FRONT END WALL, A REAR END WALL, OPPOSING SIDE WALLS, AND A CENTRAL WALL DISPOSED BETWEEN THE FRONT, REAR AND SIDE WALLS, EACH SHELL HAVING A PAIR OF SPACED SLOTS EXTENDING THROUGH THE FRONT END WALL AND CENTRAL WALL AND DEFINING A STRIP-LIKE SHELL PORTION THEREBETWEEN, A THIN NONMAGNETIC SPACER MEMBER DISPOSED BETWEEN FACING EDGES OF THE FRONT WALLS OF THE SHELLS, A TAB EXTENDING INWARDLY OF EACH SHELL FROM EACH STRIP-LIKE PORTION, REAR ENDS OF THE STRIP-LIKE SHELL PORTIONS BEING DETACHED FROM THE SHELLS, AND A COIL ASSEMBLY IN THE CASING ENGAGED ON THE TABS OF THE OPPOSING SHELLS, THE STRIP-LIKE PORTIONS OF THE OPPOSING SHELLS CONSTITUTING COOPERATING MAGNETIC POLE PIECES FOR THE COIL ASSEMBLY.