Browse Prior Art Database

Static Sensing Head Construction

IP.com Disclosure Number: IPCOM000098116D
Original Publication Date: 1960-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Bradford, RC: AUTHOR

Abstract

The device illustrated is an improved structure for a static sensing head, the laminations of which sandwich conductive sheets that carry the AC current needed for periodically varying the reluctance in the head in a magnetic tape static sensing system.

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

Static Sensing Head Construction

The device illustrated is an improved structure for a static sensing head, the laminations of which sandwich conductive sheets that carry the AC current needed for periodically varying the reluctance in the head in a magnetic tape static sensing system.

The magnetic head senses for the presence, at its gap 1, of a flux inducing signal on a magnetic tape 2. An AC current is fed through copper strips 3, sandwiched between laminations 4. The AC current is of sufficient magnitude to periodically saturate the laminations 4 in the two legs 5 of the head, and, consequently, periodically vary the reluctance of the laminations 4. The presence of the signal at the gap 1 and the varying reluctance thus cause a varying flux in the laminations 4, which in turn produces a varying voltage in the coils 6 which may be sensed by a circuit not shown.

The advantage of the head, in addition to ease of construction, is that the AC current in the copper strips 3 sets up a flux which has a minimum linkage with the coils 6 so that there is a minimum output from the coils 6 when there is no tape signal at the gap 1.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]