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Dual Gap Magnetic Recording Head

IP.com Disclosure Number: IPCOM000082203D
Original Publication Date: 1974-Oct-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Wentink, WS: AUTHOR

Abstract

Recording head A utilizes two write gaps 30 and 31 and two read gaps 32 and 33 in a single assembly, to achieve magnetic writing and magnetic reading on two adjacent magnetic disks 22 and 24.

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Dual Gap Magnetic Recording Head

Recording head A utilizes two write gaps 30 and 31 and two read gaps 32 and 33 in a single assembly, to achieve magnetic writing and magnetic reading on two adjacent magnetic disks 22 and 24.

Disks 22 and 24 are fixed with respect to a drive hub 50 for rotating disks 22 and 24, and head A is moved to be in contact with either disk 22 or disk 24 by any suitable means.

The right half of head A comprises a U-shaped relatively wide magnetic core part 26 and a straight relatively wide magnetic core part 28, with gaps 30 and 31 existing between the parts 26 and 28. A side bar 52 extends between parts 26 and 28 and has a write coil 54 wound on it. When coil 54 has a "write" signal applied to it, magnetic flux flows in two different directions, toward gap 30 and also toward gap 31. If head A is moved into contact with one or the other of disks 22 and 24, this disk has a surface of it written with information utilizing the corresponding gap 3O or gap 31.

The left half of head A includes relatively narrow parts 34 and 36, which correspond to parts 26 and 28 and provide the read gaps 32 and 33. Side bar 38 is fixed with respect to parts 34 and 36, on the side of head A opposite that on which side bar 52 is disposed; and read coil 40 is wound on side bar 38. Reading takes place using gaps 32 and 33 when head A is moved into contact with either disk 22 or 24.

When the right half of head A is used for writing, flux generated by winding 54 passe...