Page:Canadian patent 29537.djvu/19

 It is not new to produce the rotation of a motor by intermittently shifting the poles of one of its elements. This has been done by passing through independent energizing coils on one of the elements, the current from a battery or other source of direct or continuous currents, reversing such currents by suitable mechanical appliances so that they are directed through the coils in alternately opposite directions. In such cases, however, the potential of the energizing currents remains the same, their direction only being changed. According to the present invention, on the other hand, true alternating currents are employed and the invention consists in the mode or method of an apparatus for utilizing such currents.

The difference between the two plans and the advantages of this one are obvious. By producing an alternating current each impulse of which involves a rise and fall of potential, the exact conditions of the generator are reproduced in the motor, and by such currents and the consequent production of resultant poles the progression of the poles will be continuous and not intermittent. In addition to this, the practical difficulty of interrupting or reversing a current of any considerable strength is such that none of the devises at present known could be made as economically or practically effect the transmission of power by reversing, in the manner described, a continuous or direct current.

In so far, then, as the plan of acting upon one element of the motor is concerned, my invention involves the use of an alternating as distinguished from a reversed current, or a current which while continuous and direct is