Stator lead anchoring slot insulator

Claim 1

In a slot liner for an electric motor having an iron core with at least one mouthed slot, a wire coil wound on said core and into said slot, a lead element spliced to one end of the coil wire, and a slot liner of insulating sheet-like material interposed in said slot between the coil wire and the walls of said slot, said liner preformed to have an inner panel, an outer panel and a portion joining said panels generally to conform respectively to an inner, an outer and a joining wall surface of the slot, said outer panel having an outer edge extending longitudinally of the slot direction and having a flap bent back upon the outer panel from and along a fold line at said edge and adapted to form a channel receiving and anchoring a portion of the length of a said lead element at the splicing end to be retained therein; said outer edge, upon initial liner insertion for liner selfretention, engaging a low shoulder terminating said outer wall surface of the slot; the improvement comprising: a longitudinal external cut score interruption of the liner stock continuity along said fold line thereby, at said longitudinally extending outer edge, providing a generally transversely flat longitudinal edge face for engaging said shoulder and a flat disposition of the flap on the outer panel.