Design and Construction of a Machine for Testing Commutators and Brushes. A Thesis : Legare Street Press : 9781021258670 : 1021258679 : 18 Jul 2023 : This detailed technical guide explores the design and creation of a machine for testing the electrical performance of commutators and brushes, an essential component of direct current motors. Miller's thesis provides an excellent resource for electrical engineers and students studying electrical systems and machinery. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We