Page:Canadian patent 24033.djvu/3

 dynamo electric machines are well known, and those made use of in my machine may be of any desired or known character.

In the drawing:

Fig. 1 is a diagram illustrating my invention showing one core of the field magnets with one helix wound in the same direction throughout.

Figs. 2 and 3 are diagrams showing one core of the field magnets with a portion of the helices wound in opposite directions.

Figs. 4 and 5 are diagrams illustring the electric devices that may be employed for automatically adjusting the brushes and

Fig. 6 is a diagram illustrating the position of the brushes when the machine is being energised on the start.

Figs. 7, 8, 9, 10 and 11 are diagrams that further illustrate my invention as hereafter described.

a. and b. are positive and negative brushes of the main or working circuit, and c the auxilliary brush. The working circuit D, extends from the brushes a , and b , as usual and contains electric lamps or other devices D-1 either in series or in multiple arc. M , M-1 represent the field helices, the ends of which are connected to the main brushes a , and b. The branch or shunt wire c-1 extends from the auxiliary brush c to the circuit of the field helices and is connected to the same at an intermediate point X. H represents the commutator with the plates of ordinary construction.