Magnetic transducer head having an integral magnetic shield and wear indicator
AssigneeBurroughs Corporation
InventorJohn Ebenezer Sargunar
Life of this patent
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Abstract
Described is a magnetic transducer head assembly provided with a wear indicator to produce an indication when the head wear has proceeded to a predetermined point. For this purpose, the magnetic shield of the head includes a portion aligned with the pole faces of the head and which portion is subject to wear with the pole faces, such that the electrical continuity of the magnetic shield is interrupted upon the occurrence of a predetermined amount of wear of the pole faces. The magnetic shield further includes terminals for connection to an electrical device to test the electrical continuity of the shield portion, and thereby to provide an indication of the occurrence of the predetermined amount of wear.
Claims8
A magnetic transducer head assembly comprising a magnetic head including a magnetic core defining a pair of pole faces and a gap therebetween, the pole faces being subject to wear during use with respect to a recording medium, and a magnetic shield of magnetic material disposed adjacent to said magnetic core for shielding same, said magnetic shield being electrically-conductive and including a pair of terminals electrically connected together only by a bridging portion aligned with the pole faces and subject to wear therewith so that the electrical continuity between said terminals is interrupted upon the interruption of said bridging portion occurring upon a predetermined amount of wear of the pole faces, said terminals being connectable to an electrical monitoring device for monitoring the electrical continuity of said shield bridging portion and thereby for providing an indication of the occurrence of the predetermined amount of wear.
A magnetic transducer head assembly comprising a magnetic head including a magnetic core defining a pair of pole faces and a gap therebetween, the pole faces being subject to wear during use with respect to a recording medium, and a magnetic shield of magnetic material for shielding the head, said magnetic shield being electrically-conductive and including a portion aligned with the pole faces and subject to wear therewith so that the electrical continuity of said shield portion is interrupted upon the occurrence of a predetermined amount of wear of the pole faces, said magnetic shield portion including a sheet of magnetic material extending in a plane laterally of the magnetic core, said sheet being of a configuration defining a pair of legs joined by a connecting web, the connecting web being aligned with the gap with the outer edge of the web flush with the pair of pole faces, the connecting web being of a length spanning the pair of pole faces and the gap therebetween, and being of a width corresponding to said predetermined amount of wear, said pair of legs constituting terminals for testing the electrical continuity of the connecting web.
Dependencies are inferred from the claim text.