Browse Prior Art Database

Unified Gap Magnetic Head

IP.com Disclosure Number: IPCOM000096176D
Original Publication Date: 1963-Jan-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 62K

Publishing Venue

IBM

Related People

Shew, LF: AUTHOR

Abstract

The electromagnetic transducer 10 has a plurality of pole tips or gaps on a common line for erasing, recording and reproducing at the same point along the track of a magnetic recording medium.

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Unified Gap Magnetic Head

The electromagnetic transducer 10 has a plurality of pole tips or gaps on a common line for erasing, recording and reproducing at the same point along the track of a magnetic recording medium.

Supporting and shielding member 12 is of generally U-shaped cross-section in the direction of relative movement between the transducer and the recording medium. Alternatively, member 12 is in the form of a cup generated by the revolution of the cross-section line about the vertical axis through the central pole tip. Opposing lips 14 and 15 of member 12 are arranged at an angle theta of minimum electromagnetic coupling of the magnetic flux traversing core members 16 and 18-19.

With this construction the core members have only one bend. Such allows conventional windings 26, 28 and 29 (shown in phantom lines) to be slipped snugly on the cores. Three spring clips 30 hold the subassemblies of cores and windings firmly at an end on the lips 14 and 15 of member 12 while the entire assembly is potted in epoxy. Alignment of the pole tips in the slot is facilitated by core extensions 16', 18' and 19' which are gripped in the potting jig. Then, core extensions 16', 18' and 19' are clipped. Next, both faceplate 32 and the pole faces are ground to a smooth plane surface for presentation to the associated magnetic recording medium.

For vertical recording, a probe head is effected by a narrow slot in member 12 just surrounding the pole tips. For horizontal record...