Magnetic recording device with rotating head
AssigneeThomson-CSF
InventorsErnst Huijer, Jean C. Lehureau, Claude Monlouis
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Abstract
The magnetic recording device with rotating head according to the invention comprises a magnetic recording medium, a cylindrical and rotating head, a fixed magnetic excitation circuit; the head comprising, on its surface, two movable pole pieces separated by a gap and each magnetically linked to an initial and a second magnetic circuit in the shape of a portion of a ring and providing a rotating joint to the passage of the magnetic flux, with the fixed, magnetic excitation circuit possessing an excitation coil that induces an magnetic field in a magnetic circuit having two fixed pole pieces, each magnetically coupled by a gap to one of the said rings. Application: Video tape recorders in particular.
Claims2
A magnetic recording device having a rotating head comprising:
- a magnetic recording medium;
- a cylindrical rotating head;
- a fixed magnetic excitation circuit;
- two movable mounted pole pieces on the surface of said cylindrical rotating head wherein said two movable pole pieces are separated by a first gap and are each linked magnetically to a first and a second magnetic circuit wherein each of said first and second magnetic circuit have the shape of a portion of a ring and wherein said first and second magnetic circuit provide a rotation link for the passage of magnetic flux;
- said fixed magnetic excitation circuit including an excitation coil which induces a magnetic field in a magnetic circuit having two fixed pole pieces wherein each of said fixed pole pieces are magnetically coupled to said rings by a second and third gap respectively;
- and
- wherein said first magnetic circuit is located on a circular surface of said rotating head and wherein said second magnetic circuit and said first gap are located on a plane surface of said rotating head.
The magnetic recording device according to claim, 1 wherein said first gap and said first and second magnetic circuits are located on the circumferential surface of said rotating head.
Dependencies are inferred from the claim text.