Abstract: A method of applying solventless varnish to stator windings in electrical machinery. A magnetic core having a plurality of stator windings disposed in the slots of the core is positioned above a tank containing a solventless varnish, and the tank is then raised to immerse the end turns of the windings on one end of the core into the varnish. The windings are energized to heat them and the varnish which adheres to the end turns to reduce the viscosity of the varnish. The tank is then lowered and the stator and windings are inverted so that a portion of the reduced viscosity varnish which adheres to the end turns flows downwardly through the slots of the stator. This is repeated until varnish begins to flow freely through the slots to the other end, thereby indicating that good coating of the winding within the slots has been accomplished.

Abstract: A method of locking coiled conductors in slots of a dynamoelectric machine rotor by placing deformable locking members over selected axially limited areas of the coiled conductors and driving the ends of the locking members under tips of salient rotor poles to secure the locking members firmly in position against the outer surfaces of the conductors. In one form of the invention preformed sheets of insulating material are positioned around the coiled conductors and under the deformable locking members to insulate the coils from the sides of the rotor poles and from the locking members. An aspect of the invention includes the combination in a dynamoelectric machine rotor of a plurality of deformable locking members positioned to secure coiled conductors in rotor slots and to secure preformed sheets of insulating material between the outer surfaces of the conductors and the locking members when they are arranged in their coil-locking positions.

Abstract: A method of locking coiled conductors in slots of a dynamoelectric machine rotor by placing deformable locking members over selected axially limited areas of the coiled conductors and driving the ends of the locking members under tips of salient rotor poles to secure the locking members firmly in position against the outer surfaces of the conductors. In one form of the invention preformed sheets of insulating material are positioned around the coiled conductors and under the deformable locking members to insulate the coils from the sides of the rotor poles and from the locking members. An aspect of the invention includes the combination in a dynamoelectric machine rotor of a plurality of deformable locking members positioned to secure coiled conductors in rotor slots and to secure preformed sheets of insulating material between the outer surfaces of the conductors and the locking members when they are arranged in their coil-locking positions.