Abstract: A core for a dynamoelectric machine has a pair of generally opposite end faces, and wall means is provided in the core for defining at least one winding receiving slot intersecting the opposite end faces, respectively. At least a pair of layers of generally thin dielectric material are associated in overlaying relation and disposed in the slot. A set of apertures are arranged in a preselected pattern in the layers and disposed in non-aligning relation, and a set of non-apertured sections in the layers are arranged in the layer between the apertures, respectively. At least some of the apertures in each layer are communicated with at least some of the non-aperture sections in an adjacent layer, and the at least some apertures in one of the layers is also communicated with the wall means of the at least one slot.A method of assembling a core, a method of treating a core, and a method of assembling a slot liner are also disclosed.

Abstract: A method of treating a core for a dynamoelectric machine with a hardenable liquid adhesive material. The core includes winding receiving slots, a plurality of layers of a dielectric material associated in overlaying relation in each slot, a plurality of apertures in each layer arranged in non-aligning relation, and a plurality of non-apertured sections in each layer disposed in overlaying relation with the apertures in adjacent layers. In this method, the liquid adhesive material is passed by capillary action through the aperture in one of the layers in the slots and channeled by capillary action past the non-apertured sections in the one layer and another layer interposed between the one layers and the slot. The liquid adhesive material is then flowed through the apertures in the another layers into communication with the slots.A method of assembling a core, a core, a slot liner, and a method of assembling a slot liner are also disclosed.

Abstract: A method of assembling a core for a dynamoelectric machine with the core including a pair of opposite end faces, a wall in the core defining a winding receiving slot intersecting the end faces, and a plurality of layers of a generally thin dielectric material with each layer having a plurality of apertures extending therethrough in a preselected pattern. The layers are associated in overlaying relation, and the apertures in the layers are arranged in non-aligning relation with the apertures in each layer communicating with a non-apertured section of an adjacent layer, respectively. The layers in their overlaying relation are positioned in the slot, and one of the layers is interposed between another of the layers and the wall of the slot.A method of assembling a slot liner is also disclosed.