The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 28, 2000
Filed:
Mar. 20, 1998
Edward P Furlani, Lancaster, NY (US);
Christopher C Williams, Livonia, NY (US);
Syamal K Ghosh, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
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.