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:
Feb. 29, 2000
Filed:
Mar. 04, 1999
Herbert A Leupold, Eatontown, NJ (US);
Arthur Tauber, Elberon, NJ (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
In the preferred embodiment, a variable magnetic reluctor structure comprng an iron yoke having two opposing 'U'-shaped bodies, magnetic flux sources formed by portions of the yoke, a magnetic flux path, a working space and a reluctor space is provided. A reluctor member comprising diamagnetic disks is inserted within the reluctor space decreasing the magnetic permeability of the magnetic flux path to a value lesser than that of air (1.0). The iron disks increase permeability, while either a Type I or a Type II superconducting disk or a combination of iron disks interspersed between Type II superconducting disks decreases permeability. Reluctor members comprising disks constructed solely of either iron, a Type I superconducting material, a Type II superconducting material, or a diamagnetic material, can be mounted in a rotating arrangement so that a different reluctor member can be mechanically inserted within the reluctor space resulting in increases or decreases to the magnetic permeability of the magnetic flux path to a value greater than that of air (1.0). In other embodiments of this invention, a permanent magnetic reluctor structure comprising a horseshoe-shaped magnetic flux source and two reluctor members comprised of stacked superconducting baffles, as well as structures utilizing thermal controls on permeability of reluctor members of a variable magnetic reluctor structure are provided. Methods of varying permeance are also shown.