Combined magnetic head for recording and playback having adjustable end faces

Claim 2

A magnetic head apparatus for recording and playing back information in cooperation with an elongated magnetizable recording medium which may be selectively traversed, the combination which comprises: a first core part disposed with at least a portion thereof proximate the magnetizable recording medium; a second core part disposed with at least a portion thereof proximate the magnetizable recording medium, said portion of said first core part and said portion of said second core part being disposed in proximate, opposed, spaced relationships; means for varying the alignment between said first core part portion and said second core part portion in a direction transverse to the elongated magnetizable recording medium, said means selectively causing said one of said parts to be aligned with a different longitudinal portion of said magnetizable recording means and the other of said parts.

Claim 3

The apparatus as described in claim 1 wherein said means for varying the transverse alignment comprises an electrostrictive material.

Claim 4

The apparatus of claim 1 wherein each of said parts is generally planar and at least one has disposed on the main plane thereof a generally planar plate of an electrostrictive material having a direction of polarization at right angles to the main plane of the plate, said plate upon the selective application of a predetermined value and polarity of applied voltage varying the transverse alignment of said one head.

Claim 5

The apparatus as claimed in claim 3 wherein one of said plates is disposed on each main plane of each part.

Claim 6

A magnetic head apparatus for recording and playing back of information in cooperation with an elongated magnetizable recording medium which may be selectively traversed, the combination which comprises: a closing yoke having two legs extended in spaced parallel relationship; a recording winding extending around one of said legs and a playback winding extending around the other of said legs; a first poleshoe disposed proximate said one of said legs and having a face; a second poleshoe disposed proximate said other of said legs and having a face disposed in opposed spaced apart rElationship to said face of said first pole shoe; means for varying the transverse alignment of at least one of said poleshoes with respect to said elongated magnetizable recording medium said means causing said one poleshoe to be transversely aligned with a different longitudinal portion of said elongated magnetizable recording medium than the other of said poleshoes.

Claim 7

A magnetic head apparatus for recording and playing back of information in cooperation with an elongated magnetizable recording medium which may be selectively traversed, the combination which comprises: a closing yoke having two legs extended in spaced parallel relationship; a recording winding extending around one of said legs and a playback winding extending around the other of said legs; a first poleshoe disposed proximate said one of said legs and having a face; a second poleshoe disposed proximate said other of said legs and having a face disposed in opposed spaced apart rElationship to said face of said first pole shoe; means for varying the transverse alignment of at least one of said poleshoes with respect to said elongated magnetizable recording medium said means causing said one poleshoe to be transversely aligned with a different longitudinal portion of said elongated magnetizable recording medium than the other of said poleshoes.

Claim 8

The apparatus as described in claim 5 wherein said means for varying the transverse alignment of said poleshoes comprises a generally planar plate of an electrostrictive material.

Claim 9

The apparatus as described in claim 6 wherein said poleshoes are generally planar and one of said generally planar plates is disposed on opposite faces of each of said poleshoes.