Browse Prior Art Database

Method for Making a Magnetic Transducer

IP.com Disclosure Number: IPCOM000096271D
Original Publication Date: 1963-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Brown, EA: AUTHOR [+2]

Abstract

A low mass magnetic head, particularly for use in contact recording, is formed from a single piece of magnetic material to insure a low reluctance flux path. Since the maximum recording density is determined by the length of the air gap, it is desired to maintain the air gap uniform over its height so that the gap does not change as the head is worn down due to contact with the record member. This is accomplished by turning one of the pole faces perpendicular to the direction of movement of the head and turning the other pole piece parallel to the direction of movement of the head.

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Method for Making a Magnetic Transducer

A low mass magnetic head, particularly for use in contact recording, is formed from a single piece of magnetic material to insure a low reluctance flux path. Since the maximum recording density is determined by the length of the air gap, it is desired to maintain the air gap uniform over its height so that the gap does not change as the head is worn down due to contact with the record member. This is accomplished by turning one of the pole faces perpendicular to the direction of movement of the head and turning the other pole piece parallel to the direction of movement of the head.

The head has a core member 14 (upper drawing) formed from a continuous piece of magnetic material. The core structure is fixed within a housing 34 (lower drawing), a coil 40 is placed on the core structure, and the end of the central portion 44 is then bent down to form one of the pole pieces. The gap is determined by the non-magnetic spacer 42 so that a gap, as uniform as the spacer, is produced.

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