lamps D, while C' C' may be independently connected in series in a circuit including arc lamps or the like.
The generator in this system will be adapted to the converter in the manner illustrated. For example, in the preset case it consists of a pair of ordinary permanent or electro-magnets E E, between which a cylindrical armature core is mounted on a shaft F and wound with two coils G G'. The terminals of these coils are connected respectively to four insulated or collecting rings n H H H' H' and the four line circuit wires L connect the brushes K bearing on these rings to the converter in the order shown.
Noting the results of this combination it will be observed that at a given point of time the coil G is in its neutral position and is generating little or no current while the other coil G' is in a position where it exerts its maximum effect. Assuming coil G to be connected in circuit with coils B B of the converter and coil G' with coils B' B' it is evident that the poles of the ring A at such point of time will be determined by the current in coils B' B' alone. But as the armature of the generator revolves, coil G develops more current and coil G' less, until G reaches its maximum and G' its neutral position.
The obvious result will be to shift the poles of the ring A through one quarter of its periphery. The movement of the coils of the generator through the next quarter of a turn, during which coil G' enters a field of opposite polarity and generates a current of opposite direction, and increasing strength, while coil G is passing
