Abstract :
IN the last few years, new developments of Selsyn principles and new applications of modified designs have opened a vast field of use, the emphasis of which is on the system, within which the Selsyns exert control. The many advantages of these new uses are not yet fully realized. Therefore an explanation of the fundamentals of design and application of Selsyns will give a firmer basis for present applications and increase the future usefulness of this highly versatile means of control.
