or ring armature A surrounded by four coils F F F' F', of which those diametrically opposite are connected in series so that four free ends are left which are connected to the insulated contact rings b b b' b'. The ring is mounted on a shaft a' between the poles N S.
The contact rings of each pair of generator coils are connected to those of the motor respectively by means of contact brushes and the two pairs of conductors L L L' L' as indicated diametrically in Figure 12.
It is obvious from a consideration of the preceding Figures that the rotation of the generator ring produces currents in the coils F F' which, being transmitted to the motor coils, impart to the armature core of the motor, magnetic poles which are constantly shifted around the core. This effect sets up a rotation of the motor armature owing to the attractive force between the shell R and the poles of the armature, but inasmuch as the coils in this case move relatively to the shell or field magnets the movement of the coils is in the opposite direction to the progressive movement of the poles.
Other arrangements of the coils of both generator and motor are possible and a greater number of circuits may be used as will be seen in the two succeeding Figures.
Figure 13 is a diagramatic illustration of a motor and a generator, connected and constructed in accordance with the invention. Figure 14 is an end view of the generator with its field magnets in section.
The field of the motor M is produced by six magnetic poles G' G', secured to or projecting from a ring or
