Abstract A magnetic recording head for recording on a magnetically responsive recording medium is arranged to incorporate a core structure of high magnetic retentivity material with individual core members being magnetized by a respective winding to produce a magnetic flux through the magnetically responsive recording medium. A flux return path is arranged to distribute the magnetic flux in the return path to a flux density level which is ineffective to produce a recording on a recording medium and is arranged to provide a flux return path on the other side of the recording medium from the magnetic recording head. A common bias and reset winding is arranged on the core structure and is separately energized to normally bias the core structure to a magnetic state which is ineffective to produce a recording on the recording medium during the absence of a signal on the individual windings on the core members and to reset the core structure to a non-recording state after the core members have been placed in a recording state by a signal applied to the respective windings on the core members.
A magnetic recording head comprising a first magnetic core member having a first end face of a predetermined surface area and a second end face spaced from said first end face and being in a common plane therewith while having a predetermined surface area substantially greater than said surface area of said first end face, whereby a magnetic flux concentration insufficient to cause recording is associated with said second end face said first magnetic core member being made of a high magnetic retentivity characteristic material, an energizing winding wound on said magnetic core member and arranged to be connected to a source of an energizing signal suitable for producing a magnetic flux from said first and second end faces, a bias and reset winding wound on said magnetic core and arranged to be connected to a source of a bias and reset signal suitable for normally biasing said first core member into a non-magnetic flux producing state and to reset said core member into said state after the application and termination of an energizing signal to said energizing winding, and a second core member forming a magnetic flux return path and being located adjacent to said first and second end faces and separated therefrom by a distance sufficient to allow a recording medium to pass therebetween.
Claim 2
Dependent Claim
216 words
A magnetic recording head comprising a first magnetic core member having a first end face of a predetermined surface area and a second end face spaced from said first end face and being in a common plane therewith while having a predetermined surface area substantially greater than said surface area of said first end face, whereby a magnetic flux concentration insufficient to cause recording is associated with said second end face said first magnetic core member being made of a high magnetic retentivity characteristic material, an energizing winding wound on said magnetic core member and arranged to be connected to a source of an energizing signal suitable for producing a magnetic flux from said first and second end faces, a bias and reset winding wound on said magnetic core and arranged to be connected to a source of a bias and reset signal suitable for normally biasing said first core member into a non-magnetic flux producing state and to reset said core member into said state after the application and termination of an energizing signal to said energizing winding, and a second core member forming a magnetic flux return path and being located adjacent to said first and second end faces and separated therefrom by a distance sufficient to allow a recording medium to pass therebetween.
Claim 3
Dependent Claim
15 words
A magnetic recording head as set forth in claim 1 wherein said material is ferrite.
Claim 4
Dependent Claim
57 words
A magnetic recording head as set forth in claim 1 wherein said first end face is divided into a plurality of separate core projections forming recording stylii and said energizing winding means includes a separate winding on each of said projections and said bias and reset winding is arranged to be common to all of said projections.
Claim 5
Dependent Claim
28 words
A magnetic recording head as set forth in claim 1 wherein said second core member is made from a low magnetic retentivity and low magnetic reluctance characteristic material.
Claim 6
Dependent Claim
16 words
A magnetic recording head as set forth in claim 4 wherein said material is soft iron.