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 219
FlGS. 4,136 and 4,137.—Cutler-Hammer direct current non-reversible single speed semi-magnet controller and belt switch for double belt freight elevators. The controller con-sists of a sliding contact type of self-starter, with main line clapper switch, and a separatebelt switch which serves as a…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-335-206.webp)
