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 131
?igs, 3,071 and 3,072.—Detail of the differentially wound third spool of relay of the Weiny-Phillips system^ In fig. 3,071, one terminal of the battery is shown grounded while theother terminalis shown connected differentially with two equal windings of the magnet.The current divides at A, half…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
