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Process for making a magnetic armature of divided structure and armature thus obtained

  • US 4,347,449 A
  • Filed: 03/06/1980
  • Issued: 08/31/1982
  • Est. Priority Date: 03/20/1979
  • Status: Expired due to Term
First Claim
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1. A process for forming a magnetic armature having an annular shape and a concentric annular groove defined in part by concentric inner and outer radial rings, said inner ring having a radial thickness greater than that of said outer ring, said process comprising the steps of:

  • winding a filamentary magnetic material on an annular mandrel having a cross-section on one side of a plane at right angles to the axis of said mandrel, which cross-section corresponds in part to the cross-sectional contour of said groove, to produce a toroidal winding having an outer shape on said side of said plane which at least approximately corresponds to the desired outer shape of said armature;

    impregnating said winding with a hardenable material capable when hardened of joining together the turns of said winding;

    hardening said material; and

    cutting said winding along said plane to form said armature.

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