Stanley 's first patented design was for induction coils with single cores of soft iron and adjustable gaps to regulate the EMF present in the secondary winding ( see image ) .
He assigned to William Stanley the task of developing a device for commercial use in United States .
William Stanley 's first patented design was for induction coils with single cores of soft iron and adjustable gaps to regulate the EMF present in the secondary winding ( see image ) .
He assigned to William Stanley the task of developing a device for commercial use in United States .