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 57
5EC0NDARYCOIL EXTENSIONINSTRUMENT RETARDATION C0IL5 __iAAT\AM_J … Fig. 2,962.—Stock Exchange extension station as installed in New York City. Circuit at mainstation is without condenser and differs from any other telephone circuit. When extensionwants main, hand generator is used which rings bell and causes drop shutter to fall. Intalking circuit, the main…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
