Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 393
it. In multipolar machines there are asmany brushes as pole pieces,* and all the -f brushes are gen-erally connected to one main generator cable, forming the -f-terminal of the machine, and likewise to the negative brushes. *Since opposite commutator bars are of the same potential on this four-pole… … Fig. 359.—Direction of Current Through the Windings of a Ring Armature Rotating in a Four-Pole Field. DIRECT CURRENT DYNAMOS. 37t> 348. Constant Current and Constant Potential Dyna-mos.—Alternators and direct current dynamos may be classi-fied according to their design as follows : (1.) Constant…
Electricity · Magnetism
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer02inte-359-203.webp)
