Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

High Resolution Magnetic Recording Head

IP.com Disclosure Number: IPCOM000096558D
Original Publication Date: 1963-Jul-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Schlaeppi, HP: AUTHOR

Abstract

The magnetic recording head has three magnetic circuits, cooperating to obtain a pulse-sharpening effect.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

High Resolution Magnetic Recording Head

The magnetic recording head has three magnetic circuits, cooperating to obtain a pulse-sharpening effect.

Two strips of soft magnetic material, bent in tear drop shape, are mounted one inside the other. Three gaps are thus formed between four magnetic pole pieces. The three magnetic circuits operate like three consecutive magnetic heads sensing identical flux signals from the same track of the record medium, but staggered in time. The common pick-up winding is so arranged that the leading and the trailing signals are superimposed upon the main signal with opposite polarity and suitable weight.

The flux paths are built up as in the drawing. Hence, the auxiliary fluxes in the inner legs oppose the main signal flux induced in these legs. The part of the magnetic circuit where both magnetic strips are in close magnetic contact carries only the main signal flux, but no auxiliary fluxes. By division of the winding between the legs, the matched-filter effect is achieved. Such effect otherwise requires the use of a tapped delay line in an allotted playback amplifier.

1

Page 2 of 2

2

[This page contains 1 picture or other non-text object]