Eastman-kodak Company

Christopher C Williams

Edward P Furlani

Syamal K Ghosh

Charles E Brugger

Bijan Barzideh

Svetlana Reznik

A translational, bias-field device for a magneto-optical system having a magneto-optical recording clement moving through a magnetic field created by the bias-field device so that information can be selectively recorded on or erased from the recording element, the device comprises a housing and a first rail for enabling translational movement attached to the housing. A permanent magnet is positioned adjacent the recording element for providing the magnetic field to the recording element, and is attached to the first rail which enables translational movement of the magnet. A mechanical driver is attached to the magnet which driver imparts movement the permanent magnet.

Translational, bias-field device for a magneto-optical system

A bias-field apparatus for a magneto-optical system having a magneto-optical recording element which includes a conductive substrate and which moves through a magnetic field created by the bias-field device so that information is selectively recorded on or erased from the recording element, the device comprising: a support member; a magnet mounted for rotation in the support member such that when the recording element rotates the conductive substrate creates a magnetic coupling with the magnet for causing said magnet to rotate; and a ferromagnetic element having a coil disposed thereon that releases said magnetic for rotation when the coil is energized, and prevents rotation when said coil is de-energized for permitting said magnet to be selectively rotated.

Method and apparatus for inverting a bias field for magneto-optic

A bias-field apparatus for a magneto-optical system having a magneto-optical recording element which includes a conductive substrate and which moves through a magnetic field created by the bias-field device so that information is selectively recorded on or erased from the recording element, the device comprises a support member; a magnet mounted for rotation in the support member such that, when the recording element rotates, the conductive substrate creates a magnetic coupling with the magnet for causing the magnet to rotate; and (c) a ferromagnetic element enclosing a portion of said magnet and having a plurality of spatially separated pole teeth, each of said pole teeth having an operably connected coil disposed thereon that releases said magnet for rotation caused by the conductive substrate when the coil is energized, and prevents rotation when said coil is de-energized for permitting said magnet to be selectively rotated.

Magnetically coupled apparatus for inverting a bias field for

A bias-field device for a magneto-optical system having a magneto-optical recording element which includes a conductive substrate and which moves through a magnetic field created by the bias-field device so that information is selectively recorded on or erased from the recording element, the device comprises: a rotatable magnet that rotates so that when the recording element rotates the conductive substrate creates a magnetic coupling with the magnet for causing the magnet to rotate; and an escapement mechanism that releases and latches the magnet for permitting the magnet to be selectively rotated.

Motorless bias-field device and method having magnetic coupling between

A translational, bias-field device for a magneto-optical system having a magneto-optical recording element moving through a first magnetic field created by the bias-field device so that information is selectively recorded on or erased from the recording element, the device comprises a housing and a first rail for enabling translational movement attached to said housing. A permanent magnet structure is polarized through its cross-section having a first set of north and south poles on a first surface positioned adjacent the magneto-optic recording element for providing the first magnetic field to the recording element, and a second set of north and south poles on a second surface, and the permanent magnet structure attached to the first rail which enables translational movement of the magnet structure. A first coil is positioned adjacent to the magnet which, when energized, imparts a second magnetic field to the permanent magnet structure for imparting motion to the permanent magnet structure, and a second coil is positioned adjacent to the magnet which, when energized, imparts a third magnetic field to the permanent magnet structure for also imparting motion to the permanent magnet structure.

Dual coil, translational bias-field device for a magneto-optical system

A translational, bias-field device for a magneto-optical system having a magneto-optical recording element moving through a first magnetic field created by the bias-field device so that information can be selectively recorded on or erased from the recording element, the device comprises a housing. Two bars are positioned in a spaced apart relationship, disposed substantially parallel to each other and supported by the housing. A permanent magnet is positioned adjacent the recording element for providing the first magnetic field to the recording element, and is attached to the bars which induce translational movement to the magnet when the magnet is induced with a second magnetic field. A coil is positioned adjacent to the magnet which, when energized, imparts the second magnetic field to the permanent magnet.

Translational bias-field device for a magneto-optical system

An apparatus for selectively inverting an external magnetic field in a magneto-optic recording system so that information can be selectively recorded on or erased from a magneto-optic recording element of the system moving through the field, the apparatus comprises a permanent magnet including a first and second portion positioned adjacent to each other and each portion having north and south poles oriented along their cross-sectional dimension, wherein the north pole of the first portion is abuttingly adjacent to the south pole of the second portion, and the south pole of the first portion is abuttingly adjacent the north pole of the second portion; and a coil for imparting a magnetic field to the permanent magnet for moving the permanent magnet.

Growing community of inventors

Rochester, NY, United States of America

Christopher C Williams