UNIPOLAR MACHINES

455

higher than in Figs. 221 to 223, where it equals the conductor
speed.

Higher voltages then can be given by a single conductor, are

F B,

FIG. 221.—Drum type of unipolar FIG. 222.—Drum type of unipolar
machine with revolving magnet core machine with revolving magnet core
and auxiliary end gap, section. and auxiliary cylinder gap, section.

derived in the unipolar machine by connecting a number of con-
ductors in series. In this case, every series conductor obviously

FIG. 223.—Double drum type of unipolar machine, section.

requires a separate pair of collector rings. This is shown in Figs.
224 and 225, the cross-section and length section of the rotor of

1 2 34

4,3,2,1,

ZD

FIG. 224.—Multi- FIG. 225.—Multi-conductor unipolar machine,
conductor unipolar length section,
machine, cross-sec-
tion.
a four-circuit unipolar. As seen in Kg. 224, the cylindrical con-
ductor is slotted into eight sections, and diametrically opposite