Eastman-kodak Company

Ashok K Agarwala

Paul Albert Christian

Bijay S Saha

Kenneth B Quinn

A novel method for forming homogeneous silver high temperature superconductor (HTS) composites. The novel method comprises a chemical coprecipitation of silver, barium, yttrium, and copper salts solutions, followed by calcination and milling processes. The novel method has an advantage of retaining all the virtues immanent in a composite HTS, for example, increased critical current density (Jc), and improved mechanical properties, while bypassing extant and deficient methodologies for forming a composite, the deficient composites characterized by heterogeneity.

Method of preparation of silver composite high temperature ceramic

A bearing system that includes a superconductor bearing and a magnetic rotor that can carry a load. The bearing system exploits the Meissner effect to levitate the magnetic rotor. The magnetic rotor can rotate or translate with respect to the superconductor bearing in response to an applied external force or torque. Advantages of the bearing system are that a coefficient of friction developed in the interface between the superconductor bearing and the magnetic rotor is approximately zero, and the bearing system may be used for vibration isolation and non-mechanical coupling.

Bearing system employing a superconductor element

A magnetic brush useful in an electrophotographic apparatus. An outer sleeve is made of non-magnetic metal. An inner core is disposed within the outer sleeve so as to permit relative rotation of the inner core and the outer sleeve. The inner core comprises a shaft, which is made of magnetic or non-magnetic metal, and a magnetic layer covering a generally cylindrical surface of the shaft. The magnetic layer consists essentially of a plasma-sprayed alloy of iron, a rare earth, and boron. The rare earth is selected from the group consisting of neodymium, praseodymium, and mixtures thereof. Neodymium is preferred. A bonding layer may be optionally provided, preferably an alloy of nickel, chromium, aluminum, and yttrium.

Magnetic brush, inner core therefor, and method for making such core

A method employing torque magnetometry for measuring magnetic properties of a workpiece, for example, measuring the anisotropy of a magnetic thin film. The present method utilizes a novel alternative to known methods of torque magnetometry, namely, employing a viscometer, as modified in accordance with the present invention. The present method preserves all the virtues of torque magnetometry, yet realizes method objectives of efficiency, low cost, and accurate measurement.

Modified viscometer for employment in torque magnetometry

A method of magnetizing high energy rare earth alloy magnets by applying a magnetic field while heating the magnetic alloy.

Method of magnetizing high energy rare earth alloy magnets

An electric machine that includes a superconductor bearing to position and levitate a magnetic rotor. The machine also includes an armature circuit that is electro-magnetically coupled to the rotor, and an associated drive electronics. The machine can function as a generator, or a motor to drive a load, and has an advantage of frictionless operation.

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Penfield, NY, United States of America

Ashok K Agarwala