Abstract: An apparatus for forming electrical coil bars used in dynamoelectric machines of any size and cone angle. The apparatus includes at least one rotatable frusto-conical shaped member whose major diameter, minor diameter, and cone angle are adjustable to form coils for any sized dynamoelectric machine. By guiding an end portion of an electrical coil bar against the conical surface in a spiral configuration about the conical member's axis of rotation, the electrical coil bars may be caused to lie along a frusto-conical surface when assembled in the dynamoelectric machines. The frusto-conically shaped member has a plurality of radially extendible struts at one axial end thereof, a plurality of radially directed support members at the other axial end thereof, and a plurality of shaping ribs extending between the struts and support members.

Abstract: An apparatus for shaping end turn portions of dynamoelectric machine coil bars. An end portion of an electrical coil bar is bent at a selected angle to a straight portion of the electrical coil bar. The bent, end portion of the coil bar is caused to lie along a frustoconical surface having an axis of rotation extending substantially parallel to the straight portion of the coil bar. A rotatable member whose axis of rotation is mounted perpendicularly to the frustoconical surface at a selected distance from the straight coil bar portion has an opening therethrough for guiding the coil bar's end portion in a spiral configuration on the frustoconical surface when that surface is rotated about its axis through a predetermined angular displacement.