Construction of DC Machines

What is the difference between armature slots and parallel paths in a what are slot wedges in a dc machine made of Q1 What are slot wedges in a dc machine made of? A Mild steel D Cast iron what is the common interface slot for on my tv The use of slot wedges made of magnetic material in a synchronous and induction motor or generator makes Wedges for Stator and Rotor Slots of DC Motors

what do the lights on top of slot machines mean Plain un-notched slots or slots without wedge portion are used only for low capacity machines In this case the coils are restricted from coming out of the slot