Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 342
ing the length of arc, a device called a clutchfor feeding the movable carbon in the direction of the fixedcarbon to compensate for its consumption. To accomplish this a clutch must be so constructed that it willrelease the carbon and move freely over its surface when moved ELECTRIC LIGHTING 2,433…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
