Gm Global Technolgoy Operations, Inc.

Larry J Eshelman

James R Bish

Kevin A Young

Joseph J Worden

Donald E Merritt

Donald S Kirk

Chester A Hammer

This invention describes a practice for the hot pressing and/or hot working of rare earth element-containing alloy powders using open-to-the-air presses. The rare earth-containing powder is pressed into a compact at ambient temperatures using a solid lubricant only on the die wall. This compact is then hot pressed in an open air press utilizing a heated die flooded with argon.

Hot pressed magnets in open air presses

A permanent magnet assembly wherein a permanent magnet is encapsulated in a metallic housing that hermetically seals the permanent magnet. The metallic housing is formed from two stainless steel parts that are joined by a continuous impervious seam weld. The stainless steel parts take the form of a retainer having a cup portion and a plate welded to a flanged portion of the retainer. The permanent magnet is disposed within the cup portion. The permanent magnet assemblies can be welded to the internal surface of a metallic frame of a dynamoelectric machine to provide field and frame assembly for the machine.

Permanent magnet assembly

A method of coiling a flat strip, including the steps of advancing and supporting the strip, forming a partial loop on the leading end thereof while continuing to advance the strip toward an upcoiling nest where the coiling is completed, shearing the advancing strip when the coil attains a predetermined size, completing the coiling of the sheared end thereof, and ejecting the finished coil.

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Pendleton, IN, United States of America

Larry J Eshelman