Magnetic head with protective pockets of glass adjacent the corners of the gap

Claim 1

A magnetic transducer comprising a pair of complementary magnetic core halves forming a substantially closed magnetic path, the core halves including abutting pole members defining a head face and confronting pole faces, the confronting pole faces defining therebetween a non-magnetic transducing gap oriented in the width direction of said core halves, one core half defining an opening adjacent the pole pieces distal the head face and oriented in the width direction of said one core half, the pole member of the other core half being notched on each side of said non-magnetic gap, the residual width of said notched pole member or said other core half defining the width of said non-magnetic transducing gap, said notches extendIng from said head face to a level which overlaps with at least a portion of said opening to provide a passageway between said opening and said notches, an integral body of glass filling said notches and the free space region between said confronting pole faces, said integral body of glass bonding said core members together and providing pockets of glass in said notches to protect the edges of said notched pole member from edge chipping and granular pull-outs, and a coil winding disposed about at least one of said core members through said opening.