Patent ID: 7250704

Claim:
An apparatus, comprising: an electrical coil adapted for use in an electromagnetic machine and adapted for a continuous operating temperature exceeding approximately 1000 degrees F., said coil comprising: a copper winding wound about a central axis in a first spiral, said winding defining a winding width and a winding thickness, a ratio of said winding width to said winding thickness ranging from approximately 10 to approximately 30; a phlogopite mica/fiberglass tape wound about the central axis in a second spiral, said tape defining a tape width and a tape thickness, said tape located width-wise adjacent said winding; and a stainless steel shell encasing said first spiral and said second spiral, said shell comprising: an inner shell portion located proximate to and surrounding the central axis; an outer shell portion located distal to and surrounding the central axis; and an opposing pair of shell side portions each located substantially in a respective plane perpendicular to the central axis; and a phlogopite mica winding insulator separating said winding from said shell, said winding insulator comprising: a flexible inner portion insulator located between said winding and said inner shell portion; a flexible outer portion insulator located between said winding and said outer shell portion; and a rigid opposing pair of side portion insulators each located between a respective shell side portion and said winding.