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 245
ARMATURE RESISTANCE C FIELD R£5 L1tt^-V\A/W\_ •m RJ—/ … Fig. 4,166.—Diagram of Fraser direct current duplex motor controller. Shaft limit switches may be installed so as to be operated eitherby the car or by the counter-weight, or by both. The Safety Switch.—In order to insure the stopping of the elevator,even should some accident render the regular…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
