For example, in Figure 7, is an alternating current generator, B, B, the line wires or circuit. At any given point in the circuit two paths as D D', are formed, and at another point two paths as C C'. Either pair of group of paths is similar to the previous dispositions with the electrical source or induction device in one branch only, while the two groups taken together form the obvious equivalent of the cases in which an induction devices or generator is included in both branches.
In one of the paths as D are included the devices to be operated by the current. In the other branch as D' is an induction device that opposes the current impulses of one direction and directs them through the branch D. So also in branch C are translating devices G and in the branch C' an induction device or its equivalent that diverts through C, impulses of opposite direction to those diverted by the device in branch D'.
A special form of induction device for this purpose is also shown. J J' are the cores formed with pole pieces upon which are wound the coils M N. Between these pole pieces are mounted at right angles to one another the magnetic armatures O P, preferably mounted on the same shaft and designed to be rotated in synchronism with the alternations of current. When one of the armatures is in line with the poles or in the position occupied by armature P, the magnetic circuit of the induction
