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Browse Prior Art Database

Wide write, Narrow read Transducer

IP.com Disclosure Number: IPCOM000097029D
Original Publication Date: 1962-Apr-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Kornei, O: AUTHOR

Abstract

A wide write, narrow read transducer 10 is realized by providing core 12 with central laminations 14 of magnetic material of very high initial permeability. These are arranged between outer laminations 16. The latter has low initial permeability. The two materials have approximately the same saturation value.

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Wide write, Narrow read Transducer

A wide write, narrow read transducer 10 is realized by providing core 12 with central laminations 14 of magnetic material of very high initial permeability. These are arranged between outer laminations 16. The latter has low initial permeability. The two materials have approximately the same saturation value.

Both central and outer laminations approach saturation upon application of the write current. A magnetic record of width approximately equal to the width of the entire core is written. During reading, however, the very much lower field strength does not appreciably affect the outer laminations 16 of the core. The flux change is substantially confined to central laminations 14. Thus, if transducer 10 is positioned off center of the record track, little or no flux change is detected in the adjacent record track by outer laminations 16. Spurious signals due to transducer positioning error are avoided. Also, the read signal amplitude is independent, within limits, of head displacement.

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